HPE FlexNetwork 5510 HI Switch Series

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1 HPE FlexNetwork 5510 HI Switch Series Layer 3 IP Services Command Reference Part number: b Software version: Release 11xx Document version: 6W

2 Copyright 2015, 2017 Hewlett Packard Enterprise Development LP The information contained herein is subject to change without notice. The only warranties for Hewlett Packard Enterprise products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. Hewlett Packard Enterprise shall not be liable for technical or editorial errors or omissions contained herein. Confidential computer software. Valid license from Hewlett Packard Enterprise required for possession, use, or copying. Consistent with FAR and , Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor s standard commercial license. Links to third-party websites take you outside the Hewlett Packard Enterprise website. Hewlett Packard Enterprise has no control over and is not responsible for information outside the Hewlett Packard Enterprise website. Acknowledgments Intel, Itanium, Pentium, Intel Inside, and the Intel Inside logo are trademarks of Intel Corporation in the United States and other countries. Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. Adobe and Acrobat are trademarks of Adobe Systems Incorporated. Java and Oracle are registered trademarks of Oracle and/or its affiliates. UNIX is a registered trademark of The Open Group.

3 Contents ARP commands 1 arp check enable 1 arp check log enable 1 arp max-learning-num 2 arp max-learning-number 3 arp mode uni 4 arp multiport 5 arp static 5 arp timer aging 7 display arp 7 display arp ip-address 9 display arp timer aging 10 display arp vpn-instance 10 reset arp 11 Gratuitous ARP commands 13 arp ip-conflict log prompt 13 arp send-gratuitous-arp 13 gratuitous-arp-learning enable 14 gratuitous-arp-sending enable 15 Proxy ARP commands 16 display local-proxy-arp 16 display proxy-arp 16 local-proxy-arp enable 17 proxy-arp enable 18 ARP snooping commands 19 arp snooping enable 19 display arp snooping 19 reset arp snooping 20 IP addressing commands 22 display ip interface 22 display ip interface brief 24 ip address 25 ip address unnumbered 26 DHCP commands 28 Common DHCP commands 28 dhcp dscp 28 dhcp enable 28 dhcp select 29 DHCP server commands 30 address range 30 bims-server 31 bootfile-name 31 class 32 dhcp class 33 dhcp server always-broadcast 34 dhcp server apply ip-pool 35 dhcp server bootp ignore 35 dhcp server bootp reply-rfc dhcp server forbidden-ip 36 dhcp server ip-pool 37 dhcp server ping packets 38 dhcp server ping timeout 39 i

4 dhcp server relay information enable 39 display dhcp server conflict 40 display dhcp server expired 41 display dhcp server free-ip 42 display dhcp server ip-in-use 43 display dhcp server pool 44 display dhcp server statistics 46 dns-list 48 domain-name 48 expired 49 forbidden-ip 50 gateway-list 50 if-match 51 nbns-list 53 netbios-type 53 network 54 next-server 55 option 56 reset dhcp server conflict 57 reset dhcp server expired 58 reset dhcp server ip-in-use 58 reset dhcp server statistics 59 static-bind 59 tftp-server domain-name 60 tftp-server ip-address 61 voice-config 61 DHCP relay agent commands 62 dhcp relay check mac-address 62 dhcp relay check mac-address aging time 63 dhcp relay client-information record 64 dhcp relay client-information refresh 64 dhcp relay client-information refresh enable 65 dhcp relay information circuit-id 66 dhcp relay information enable 68 dhcp relay information remote-id 68 dhcp relay information strategy 69 dhcp relay release ip 70 dhcp relay server-address 71 dhcp smart-relay enable 71 display dhcp relay check mac-address 72 display dhcp relay client-information 73 display dhcp relay information 74 display dhcp relay server-address 75 display dhcp relay statistics 76 reset dhcp relay client-information 77 reset dhcp relay statistics 78 DHCP client commands 78 dhcp client dad enable 78 dhcp client dscp 79 dhcp client identifier 79 display dhcp client 80 ip address dhcp-alloc 82 DHCP snooping commands 83 dhcp snooping binding database filename 83 dhcp snooping binding database update interval 84 dhcp snooping binding database update now 85 dhcp snooping binding record 86 dhcp snooping check mac-address 86 dhcp snooping check request-message 87 dhcp snooping enable 87 dhcp snooping information circuit-id 88 dhcp snooping information enable 90 ii

5 dhcp snooping information remote-id 90 dhcp snooping information strategy 91 dhcp snooping max-learning-num 92 dhcp snooping rate-limit 93 dhcp snooping trust 93 display dhcp snooping binding 94 display dhcp snooping binding database 95 display dhcp snooping information 96 display dhcp snooping packet statistics 97 display dhcp snooping trust 98 reset dhcp snooping binding 98 reset dhcp snooping packet statistics 99 BOOTP client commands 99 display bootp client 99 ip address bootp-alloc 100 DNS commands 101 display dns domain 101 display dns host 101 display dns server 103 display ipv6 dns server 104 dns domain 105 dns dscp 105 dns proxy enable 106 dns server 106 dns source-interface 107 dns spoofing 108 dns trust-interface 109 ip host 110 ipv6 dns dscp 111 ipv6 dns server 111 ipv6 dns spoofing 112 ipv6 host 113 reset dns host 114 DDNS commands 115 ddns apply policy 115 ddns dscp 116 ddns policy 116 display ddns policy 117 interval 118 method 119 password 120 ssl-client-policy 121 url 122 username 123 Basic IP forwarding commands 125 display fib 125 Load sharing commands 128 ip load-sharing local-first enable 128 ip load-sharing mode per-flow 128 Fast forwarding commands 130 display ip fast-forwarding aging-time 130 display ip fast-forwarding cache 130 display ip fast-forwarding fragcache 131 ip fast-forwarding aging-time 132 ip fast-forwarding load-sharing 133 reset ip fast-forwarding cache 133 iii

6 IRDP commands 135 ip irdp 135 ip irdp address 135 ip irdp lifetime 136 ip irdp interval 137 ip irdp multicast 137 ip irdp preference 138 IP performance optimization commands 140 display icmp statistics 140 display ip statistics 140 display rawip 142 display rawip verbose 143 display tcp 145 display tcp statistics 146 display tcp verbose 148 display udp 150 display udp statistics 151 display udp verbose 152 ip forward-broadcast 154 ip icmp error-interval 155 ip icmp fragment discarding 156 ip icmp source 156 ip mtu 157 ip redirects enable 158 ip ttl-expires enable 158 ip unreachables enable 159 reset ip statistics 160 reset tcp statistics 160 reset udp statistics 161 tcp mss 161 tcp path-mtu-discovery 162 tcp syn-cookie enable 163 tcp timer fin-timeout 163 tcp timer syn-timeout 164 tcp window 164 UDP helper commands 166 display udp-helper interface 166 reset udp-helper statistics 167 udp-helper broadcast-map 167 udp-helper enable 168 udp-helper port 168 udp-helper server 169 UDP helper commands 171 display udp-helper interface 171 reset udp-helper statistics 172 udp-helper broadcast-map 172 udp-helper enable 173 udp-helper port 173 udp-helper server 174 IPv6 basics commands 176 display ipv6 fib 176 display ipv6 icmp statistics 177 display ipv6 interface 178 display ipv6 interface prefix 182 display ipv6 nd snooping 183 display ipv6 nd snooping count 184 display ipv6 neighbors 185 iv

7 display ipv6 neighbors count 187 display ipv6 neighbors vpn-instance 187 display ipv6 pathmtu 188 display ipv6 prefix 189 display ipv6 rawip 190 display ipv6 rawip verbose 191 display ipv6 statistics 194 display ipv6 tcp 195 display ipv6 tcp verbose 197 display ipv6 udp 200 display ipv6 udp verbose 201 ipv6 address 203 ipv6 address anycast 204 ipv6 address auto 205 ipv6 address auto link-local 206 ipv6 address eui ipv6 address link-local 207 ipv6 hop-limit 208 ipv6 hoplimit-expires enable 209 ipv6 icmpv6 error-interval 209 ipv6 icmpv6 multicast-echo-reply enable 210 ipv6 icmpv6 source 211 ipv6 mtu 211 ipv6 nd autoconfig managed-address-flag 212 ipv6 nd autoconfig other-flag 213 ipv6 nd dad attempts 214 ipv6 nd ns retrans-timer 214 ipv6 nd nud reachable-time 215 ipv6 nd ra halt 216 ipv6 nd ra hop-limit unspecified 216 ipv6 nd ra interval 217 ipv6 nd ra no-advlinkmtu 218 ipv6 nd ra prefix 218 ipv6 nd ra router-lifetime 219 ipv6 nd snooping enable global 220 ipv6 nd snooping enable link-local 220 ipv6 nd snooping glean source 221 ipv6 nd snooping max-learning-num 222 ipv6 nd router-preference 222 ipv6 neighbor 223 ipv6 neighbor link-local minimize 224 ipv6 neighbor stale-aging 225 ipv6 neighbors max-learning-num 225 ipv6 option drop enable 226 ipv6 pathmtu 227 ipv6 pathmtu age 227 ipv6 prefer temporary-address 228 ipv6 prefix 229 ipv6 redirects enable 229 ipv6 temporary-address 230 ipv6 unreachables enable 231 local-proxy-nd enable 232 proxy-nd enable 232 reset ipv6 nd snooping 233 reset ipv6 neighbors 233 reset ipv6 pathmtu 234 reset ipv6 statistics 235 DHCPv6 commands 236 Common DHCPv6 commands 236 display ipv6 dhcp duid 236 ipv6 dhcp dscp 236 v

8 ipv6 dhcp select 237 DHCPv6 server commands 238 address range 238 display ipv6 dhcp pool 239 display ipv6 dhcp prefix-pool 240 display ipv6 dhcp server 241 display ipv6 dhcp server conflict 242 display ipv6 dhcp server expired 243 display ipv6 dhcp server ip-in-use 244 display ipv6 dhcp server pd-in-use 246 display ipv6 dhcp server statistics 248 dns-server 249 domain-name 250 ipv6 dhcp pool 250 ipv6 dhcp prefix-pool 251 ipv6 dhcp server 252 ipv6 dhcp server apply pool 253 ipv6 dhcp server forbidden-address 254 ipv6 dhcp server forbidden-prefix 255 network 256 option 256 prefix-pool 258 reset ipv6 dhcp server conflict 259 reset ipv6 dhcp server expired 259 reset ipv6 dhcp server ip-in-use 260 reset ipv6 dhcp server pd-in-use 260 reset ipv6 dhcp server statistics 261 sip-server 261 static-bind 262 temporary address range 263 DHCPv6 relay agent commands 264 display ipv6 dhcp relay server-address 264 display ipv6 dhcp relay statistics 265 ipv6 dhcp relay server-address 267 reset ipv6 dhcp relay statistics 268 DHCPv6 client commands 269 display ipv6 dhcp client 269 display ipv6 dhcp client statistics 271 ipv6 address dhcp-alloc 272 ipv6 dhcp client dscp 273 ipv6 dhcp client pd 273 ipv6 dhcp client stateless enable 274 reset ipv6 dhcp client statistics 275 DHCPv6 snooping commands 275 display ipv6 dhcp snooping binding 275 display ipv6 dhcp snooping binding database 276 display ipv6 dhcp snooping packet statistics 277 display ipv6 dhcp snooping trust 277 ipv6 dhcp snooping binding database filename 278 ipv6 dhcp snooping binding database update interval 279 ipv6 dhcp snooping binding database update now 280 ipv6 dhcp snooping binding record 281 ipv6 dhcp snooping check request-message 281 ipv6 dhcp snooping enable 282 ipv6 dhcp snooping max-learning-num 282 ipv6 dhcp snooping option interface-id enable 283 ipv6 dhcp snooping option interface-id string 284 ipv6 dhcp snooping option remote-id enable 284 ipv6 dhcp snooping option remote-id string 285 ipv6 dhcp snooping rate-limit 286 ipv6 dhcp snooping trust 286 reset ipv6 dhcp snooping binding 287 vi

9 reset ipv6 dhcp snooping packet statistics 287 IPv6 fast forwarding commands 289 display ipv6 fast-forwarding aging-time 289 display ipv6 fast-forwarding cache 289 ipv6 fast-forwarding aging-time 291 ipv6 fast-forwarding load-sharing 291 reset ipv6 fast-forwarding cache 292 Tunneling commands 293 bandwidth 293 default 293 description 294 destination 294 display interface tunnel 295 interface tunnel 299 mtu 300 reset counters interface 300 service 301 shutdown 301 source 302 tunnel dfbit enable 303 tunnel discard ipv4-compatible-packet 304 tunnel tos 304 tunnel ttl 305 GRE commands 306 keepalive 306 Document conventions and icons 307 Conventions 307 Network topology icons 308 Support and other resources 309 Accessing Hewlett Packard Enterprise Support 309 Accessing updates 309 Websites 310 Customer self repair 310 Remote support 310 Documentation feedback 310 Index 313 vii

10 ARP commands arp check enable Use arp check enable to enable dynamic ARP entry check. Use undo arp check enable to disable dynamic ARP entry check. arp check enable undo arp check enable Dynamic ARP entry check is enabled. System view Dynamic ARP entry check disables a device from supporting dynamic ARP entries with multicast MAC addresses. The device cannot learn dynamic ARP entries containing multicast MAC addresses. You cannot manually add static ARP entries that contain multicast MAC addresses. When this function is disabled, ARP entries containing multicast MAC addresses are supported. The device can learn dynamic ARP entries containing multicast MAC addresses obtained from the ARP packets sourced from a unicast MAC address. You can also manually add static ARP entries containing multicast MAC addresses. # Enable dynamic ARP entry check. [Sysname] arp check enable arp check log enable Use arp check log enable to enable the ARP logging function. Use undo arp check log enable to disable the ARP logging function. arp check log enable undo arp check log enable ARP logging is disabled. System view 1

11 This function enables a device to log ARP events when ARP cannot resolve IP addresses correctly. The device can log the following ARP events: On a proxy ARP-disabled interface, the target IP address of a received ARP packet is not one of the following IP addresses: The IP address of the receiving interface. The virtual IP address of the VRRP group. The public address after NAT. The sender IP address of a received ARP reply conflicts with one of the following IP addresses: The IP address of the receiving interface. The virtual IP address of the VRRP group. The public address after NAT. The device sends ARP log messages to the information center. You can use the info-center source command to specify the log output rules for the information center. For more information about information center, see Network Management and Monitoring Configuration Guide. The device can generate a large amount of ARP logs. To conserve system resources, enable ARP logging only when you are troubleshooting or debugging ARP events. # Enable ARP logging. [Sysname] arp check log enable arp max-learning-num Use arp max-learning-num to set the maximum number of dynamic ARP entries that an interface can learn. Use undo arp max-learning-num to restore the default. arp max-learning-num number undo arp max-learning-num In Release 1111, an interface can learn a maximum of dynamic ARP entries. In Release 1121 and later, the maximum number of dynamic ARP entries that an interface can learn depends on the ARP table capacity set by using the switch-mode command. For information about the switch-mode command, see Fundamentals Command Reference. Layer 2 Ethernet interface view, Layer 3 Ethernet interface view, VLAN interface view, Layer 2 aggregate interface view, Layer 3 aggregate interface view number: Specifies the maximum number of dynamic ARP entries for an interface. In Release 1111, the value range for this argument is 0 to In Release 1121 and later, the value range for this argument is 0 to N. The value for N depends on the ARP table capacity. 2

12 An interface can dynamically learn ARP entries. To prevent an interface from holding too many ARP entries, you can set the maximum number of dynamic ARP entries that the interface can learn. When the maximum number is reached, the interface stops learning ARP entries. When the number argument is set to 0, the interface is disabled from learning dynamic ARP entries. # Specify VLAN-interface 40 to learn a maximum of 500 dynamic ARP entries. [Sysname] interface vlan-interface 40 [Sysname-Vlan-interface40] arp max-learning-num 500 # Specify GigabitEthernet 1/0/1 to learn a maximum of 1000 dynamic ARP entries. [Sysname] interface GigabitEthernet 1/0/1 [Sysname-GigabitEthernet1/0/1] arp max-learning-num 1000 # Specify Layer 2 aggregate interface Bridge-Aggregation 1 to learn a maximum of 1000 dynamic ARP entries. [Sysname] interface bridge-aggregation 1 [Sysname-Bridge-Aggregation1] arp max-learning-num 1000 # Specify Layer 3 aggregate interface Route-Aggregation 1 to learn a maximum of 1000 dynamic ARP entries. [Sysname] interface route-aggregation 1 [Sysname-Route-Aggregation1] arp max-learning-num 1000 arp max-learning-number Use arp max-learning-number to set the maximum number of dynamic ARP entries that a device can learn. Use undo arp max-learning-number to restore the default. arp max-learning-number number slot slot-number undo arp max-learning-number slot slot-number In Release 1111, a device can learn a maximum of dynamic ARP entries. In Release 1121 and later, the maximum number of dynamic ARP entries that a device can learn depends on the ARP table capacity set by using the switch-mode command. For information about the switch-mode command, see Fundamentals Command Reference. System view 3

13 number: Specifies the maximum number of dynamic ARP entries for a device. In Release 1111, the value range for this argument is 0 to In Release 1121 and later, the value range for this argument is 0 to N. The value for N depends on the ARP table capacity. slot slot-number: Displays the ARP entries of an IRF member device. The slot-number argument specifies the ID of the IRF member device. A device can dynamically learn ARP entries. To prevent a device from holding too many ARP entries, you can set the maximum number of dynamic ARP entries that the device can learn. When the maximum number is reached, the device stops learning ARP entries. When the number argument is set to 0, the device is disabled from learning dynamic ARP entries. # Set the IRF member device in slot 1 to learn a maximum of 64 dynamic ARP entries. [Sysname] arp max-learning-number 64 slot 1 arp mode uni Use arp mode uni to configure a port as a customer-side port. Use undo arp mode to restore the default. arp mode uni undo arp mode A port operates as a network-side port. VLAN interface view This command is available in Release 1121 and later. By default, the device associates an ARP entry with routing information when the device learns an ARP entry. The ARP entry provides the next hop information for routing. To save hardware resources, you can use this command to specify a port that connects to a user terminal as a customer-side port. The device will not associate the routing information with the learned ARP entries. # Configure VLAN-interface 2 as a customer-side port. [Sysname] interface vlan-interface 2 [Sysname-Vlan-interface2] arp mode uni 4

14 arp multiport Use arp multiport to configure a multiport ARP entry. Use undo arp to remove an ARP entry. arp multiport ip-address mac-address vlan-id [ vpn-instance vpn-instance-name ] undo arp ip-address [ vpn-instance-name ] No multiport ARP entries are configured. System view ip-address: Specifies an IP address for the multiport ARP entry. mac-address: Specifies a MAC address for the multiport ARP entry, in the format of H-H-H. vlan-id: Specifies a VLAN for the multiport ARP entry, in the range of 1 to vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance for the multiport ARP entry. The vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. The specified VPN instance must already exist. Without this option, the multiport ARP entry belongs to the public network. The specified VLAN must already exist. If the VLAN or the corresponding VLAN interface is removed, the multiport ARP entry is also removed. The specified IP address must reside on the same subnet as the VLAN interface of the specified VLAN. Otherwise, the multiport ARP entry does not take effect. To use the multiport ARP entry, you must configure a multicast or multiport unicast MAC address entry to specify multiple output interfaces. The MAC address entry must have the same MAC address and VLAN ID as the multiport ARP entry. # Configure a multiport ARP entry that comprises IP address and MAC address 00e0-fc in VLAN 10. [Sysname] arp multiport e0-fc arp static display arp multiport reset arp multiport Use arp static to configure a static ARP entry. Use undo arp to remove an ARP entry. 5

15 arp static ip-address mac-address [ vlan-id interface-type interface-number ] [ vpn-instance vpn-instance-name ] undo arp ip-address [ vpn-instance-name ] No static ARP entries are configured. System view ip-address: Specifies an IP address for the static ARP entry. mac-address: Specifies a MAC address for the static ARP entry, in the format of H-H-H. vlan-id: Specifies the ID of a VLAN to which the static ARP entry belongs. The value range is 1 to The VLAN and VLAN interface must already exist. interface-type interface-number: Specifies an interface by its type and number. Make sure the interface belongs to the specified VLAN. vpn-instance vpn-instance-name: Specifies an MPLS L3VPN for the static ARP entry. The vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. The VPN instance must already exist. To specify a static ARP entry on the public network, do not specify this option. A static ARP entry is manually configured and maintained. It does not age out and cannot be overwritten by any dynamic ARP entry. Static ARP entries can be classified into long and short static ARP entries. A short static ARP entry contains an IP-to-MAC mapping. A long static ARP entry contains an IP-to-MAC mapping, a VLAN, and an output interface. A static ARP entry is effective when the device works correctly. When the VLAN or VLAN interface is deleted, long static ARP entries in the VLAN are deleted, and resolved short static ARP entries in the VLAN become unresolved. A resolved short static ARP entry becomes unresolved upon certain events, for example, when the output interface goes down. A long static ARP entry is ineffective when the corresponding VLAN interface or output interface is down. An ineffective long static ARP entry cannot be used to forward packets. If you specify both the vlan-id and ip-address arguments, the IP address of the corresponding VLAN interface must be on the same network as the specified IP address. If you do not specify a VPN, the undo arp command removes ARP entries only for the public network. # Configure a static ARP entry that comprises IP address , MAC address 00e0-fc , and output interface GigabitEthernet 1/0/1 in VLAN 10. [Sysname] arp static e0-fc GigabitEthernet 1/0/1 display arp 6

16 reset arp arp timer aging Use arp timer aging to set the aging timer for dynamic ARP entries. Use undo arp timer aging to restore the default. arp timer aging aging-time undo arp timer aging The aging timer for dynamic ARP entries is 20 minutes. System view aging-time: Sets the aging timer for dynamic ARP entries, in the range of 1 to 1440 minutes. Each dynamic ARP entry in the ARP table has a limited lifetime, called an aging timer. The aging timer of a dynamic ARP entry is reset each time the dynamic ARP entry is updated. Dynamic ARP entries that are not updated before their aging timers expire are deleted from the ARP table. Set the aging timer for dynamic ARP entries as needed. For example, when you configure proxy ARP, set a short aging time so that invalid dynamic ARP entries can be deleted in time. # Set the aging timer for dynamic ARP entries to 10 minutes. [Sysname] arp timer aging 10 display arp display arp timer aging Use display arp to display ARP entries. display arp [ [ all dynamic multiport static ] [ slot slot-number ] vlan vlan-id interface interface-type interface-number ] [ count verbose ] Any view network-operator 7

17 all: Displays all ARP entries. dynamic: Displays dynamic ARP entries. multiport: Displays multiport ARP entries. static: Displays static ARP entries. slot slot-number: Displays the ARP entries of an IRF member device. The slot-number argument specifies the ID of the IRF member device. vlan vlan-id: Displays the ARP entries for the specified VLAN. The VLAN ID is in the range of 1 to interface interface-type interface-number: Displays the ARP entries for the interface specified by the argument interface-type interface-number. count: Displays the number of ARP entries. verbose: Displays detailed information about ARP entries. This command displays information about ARP entries, including the IP address, MAC address, VLAN ID, output interface, entry type, and aging timer. If you do not specify any parameters, the command displays all ARP entries. # Display all ARP entries. <Sysname> display arp all Type: S-Static D-Dynamic O-Openflow M-Multiport I-Invalid IP Address MAC Address VLAN Interface Aging Type e0-fc N/A N/A N/A S e0-fe GE1/0/1 N/A IS d-88f7-9f7d 1 GE1/0/2 18 D a GE1/0/3 20 D c-299d-c N/A N/A M # Display detailed information about all ARP entries. <Sysname> display arp all verbose Type: S-Static D-Dynamic O-Openflow M-Multiport I-Invalid IP Address MAC Address VLAN Interface Aging Type Vpn Instance e0-fc N/A N/A N/A S [No Vrf] e0-fe GE1/0/1 N/A IS [No Vrf] d-88f7-9f7d 1 GE1/0/2 18 D [No Vrf] a GE1/0/3 20 D [No Vrf] c-299d-c N/A N/A M [No Vrf] # Display the number of all ARP entries. <Sysname> display arp all count Total number of entries : 5 8

18 Table 1 Command output Field IP Address MAC Address VLAN Interface Aging Type Vpn Instance Total number of entries Description IP address in an ARP entry. MAC address in an ARP entry. ID of the VLAN to which the ARP entry belongs. This field displays N/A in either of the following situations: The ARP entry is an unresolved short static ARP entry. The output interface of the ARP entry does not belong to the VLAN. Output interface in an ARP entry. This field displays N/A in either of the following situations: The ARP entry is an unresolved short static ARP entry. The ARP entry is a multiport ARP entry and has no output interface information. To obtain the output interface information of the multiport ARP entry, look up the MAC address table according to the MAC address in the ARP entry. Aging time for a dynamic ARP entry in minutes. N/A means unknown aging time or no aging time. ARP entry type: D Dynamic. S Static. O OpenFlow. M Multiport. I Invalid. Name of VPN instance. [No Vrf] is displayed if no VPN instance is configured for the ARP entry. Number of ARP entries. arp static reset arp display arp ip-address Use display arp ip-address to display the ARP entry for an IP address. display arp ip-address [ slot slot-number ] [ verbose ] Any view network-operator ip-address: Displays the ARP entry for the specified IP address. slot slot-number: Displays the specified ARP entry of an IRF member device. The slot-number argument specifies the ID of the IRF member device. 9

19 verbose: Displays the detailed information about the specified ARP entry. The ARP entry information includes the IP address, MAC address, VLAN ID, output interface, entry type, and aging timer. # Display the ARP entry for the IP address <Sysname> display arp Type: S-Static D-Dynamic O-Openflow M-Multiport I-Invalid IP address MAC address VLAN Interface Aging Type e0-fc N/A N/A N/A S arp static reset arp display arp timer aging Use display arp timer aging to display the aging timer of dynamic ARP entries. display arp timer aging Any view network-operator # Display the aging timer of dynamic ARP entries. <Sysname> display arp timer aging Current ARP aging time is 10 minute(s) arp timer aging display arp vpn-instance Use display arp vpn-instance to display the ARP entries for a VPN instance. display arp vpn-instance vpn-instance-name [ count ] Any view network-operator 10

20 vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. count: Displays the number of ARP entries. This command displays information about ARP entries for a VPN instance, including the IP address, MAC address, VLAN ID, output interface, entry type, and aging timer. # Display ARP entries for the VPN instance named test. <Sysname> display arp vpn-instance test Type: S-Static D-Dynamic O-Openflow M-Multiport I-Invalid IP address MAC address VLAN ID Interface Aging Type e0-fc N/A N/A N/A S reset arp arp static reset arp Use reset arp to clear ARP entries from the ARP table. reset arp { all dynamic interface interface-type interface-number multiport slot slot-number static } User view all: Clears all ARP entries. dynamic: Clears all dynamic ARP entries. multiport: Clears all multiport ARP entries. static: Clears all static ARP entries. slot slot-number: Clears the ARP entries of an IRF member device. The slot-number argument specifies the ID of the IRF member device. interface interface-type interface-number: Clears the ARP entries for the interface specified by the argument interface-type interface-number. This command can separately clear static ARP entries, dynamic ARP entries, multiport ARP entries, or ARP entries on specified interfaces. When the interface interface-type interface-number option is specified, this command clears only dynamic ARP entries for the specified interface. When the slot slot-number option is specified, this command clears only dynamic ARP entries for the specified IRF member device. 11

21 # Clear all static ARP entries. <Sysname> reset arp static arp static display arp 12

22 Gratuitous ARP commands arp ip-conflict log prompt Use arp ip-conflict log prompt to enable IP conflict notification without conflict confirmation. Use undo arp ip-conflict log prompt to restore the default. arp ip-conflict log prompt undo arp ip-conflict log prompt IP conflict notification is disabled. The device performs the following operations if it is using the sender IP address of a received ARP packet: Sends a gratuitous ARP request. Displays an error message after the device receives an ARP reply about the conflict. System view # Enable IP conflict notification on the device. [Sysname] arp ip-conflict log prompt arp send-gratuitous-arp Use arp send-gratuitous-arp to enable periodic sending of gratuitous ARP packets and set the sending interval on an interface. Use undo arp send-gratuitous-arp to disable the interface from periodically sending gratuitous ARP packets. arp send-gratuitous-arp [ interval milliseconds ] undo arp send-gratuitous-arp Periodic sending of gratuitous ARP is disabled. Layer 3 Ethernet interface view, Layer 3 aggregate interface view, VLAN interface view interval milliseconds: Sets the interval at which gratuitous ARP packets are sent, in the range of 200 to milliseconds. The default value is 2000 milliseconds. 13

23 This function takes effect only when the enabled interface is up and an IP address has been assigned to the interface. This function can send gratuitous ARP requests only for a VRRP virtual IP address, or the sending interface's primary IP address or manually configured secondary IP address. The primary IP address can be configured manually or automatically, whereas the secondary IP address must be configured manually. If you change the interval for sending gratuitous ARP packets, the configuration takes effect at the next sending interval. The frequency of sending gratuitous ARP packets might be much lower than expected when any of the following conditions exist: This function is enabled on multiple interfaces. Each interface is configured with multiple secondary IP addresses. A small sending interval is configured in the preceding cases. # Enable VLAN-interface 2 to send gratuitous ARP packets every 300 milliseconds. [Sysname] interface vlan-interface 2 [Sysname-Vlan-interface2] arp send-gratuitous-arp interval 300 gratuitous-arp-learning enable Use gratuitous-arp-learning enable to enable learning of gratuitous ARP packets. Use undo gratuitous-arp-learning enable to disable learning of gratuitous ARP packets. gratuitous-arp-learning enable undo gratuitous-arp-learning enable Learning of gratuitous ARP packets is enabled. System view The learning of gratuitous ARP packets function allows a device to maintain its ARP table by creating or updating ARP entries based on received gratuitous ARP packets. When this function is disabled, the device uses received gratuitous ARP packets to update existing ARP entries only. ARP entries are not created based on the received gratuitous ARP packets, which saves ARP table space. # Enable learning of gratuitous ARP packets. [Sysname] gratuitous-arp-learning enable 14

24 gratuitous-arp-sending enable Use gratuitous-arp-sending enable to enable sending of gratuitous ARP packets upon receiving ARP requests whose sender IP address is on a different subnet. Use undo gratuitous-arp-sending enable to restore the default. gratuitous-arp-sending enable undo gratuitous-arp-sending enable A device does not send gratuitous ARP packets when it receives ARP requests whose sender IP address is on a different subnet. System view # Disable a device from sending gratuitous ARP packets upon receiving ARP requests whose sender IP address is on a different subnet. [Sysname] undo gratuitous-arp-sending enable 15

25 Proxy ARP commands display local-proxy-arp Use display local-proxy-arp to display the local proxy ARP status. display local-proxy-arp [ interface interface-type interface-number ] Any view network-operator interface interface-type interface-number: Displays the local proxy ARP status for the specified interface. You can use this command to check whether local proxy ARP is enabled or disabled. If an interface is specified, this command displays the local proxy ARP status for the specified interface. If no interface is specified, this command displays the local proxy ARP status for all interfaces. # Display the local proxy ARP status for VLAN-interface 2. <Sysname> display local-proxy-arp interface vlan-interface 2 Interface Vlan-interface2 Local Proxy ARP status: enabled local-proxy-arp enable display proxy-arp Use display proxy-arp to display the proxy ARP status. display proxy-arp [ interface interface-type interface-number ] Any view network-operator interface interface-type interface-number: Displays the proxy ARP status for the specified interface. 16

26 You can use this command to check whether proxy ARP is enabled or disabled. If an interface is specified, this command displays proxy ARP status for the specified interface. If no interface is specified, this command displays proxy ARP status for all interfaces. # Display the proxy ARP status on VLAN-interface 1. <Sysname> display proxy-arp interface Vlan-interface 1 Interface Vlan-interface1 Proxy ARP status: disabled proxy-arp enable local-proxy-arp enable Use local-proxy-arp enable to enable local proxy ARP. Use undo local-proxy-arp enable to disable local proxy ARP. local-proxy-arp enable [ ip-range startip to endip ] undo local-proxy-arp enable Local proxy ARP is disabled. VLAN interface view, Layer 3 Ethernet interface view, Layer 3 aggregate interface view ip-range startip to endip: Specifies the IP address range for which local proxy ARP is enabled. The start IP address must be lower than or equal to the end IP address. Proxy ARP enables a device on a network to answer ARP requests for an IP address not on that network. With proxy ARP, hosts in different broadcast domains can communicate with each other as they do on the same network. Proxy ARP includes common proxy ARP and local proxy ARP. Common proxy ARP allows communication between hosts that connect to different Layer 3 interfaces and reside in different broadcast domains. Local proxy ARP allows communication between hosts that connect to the same Layer 3 interface and reside in different broadcast domains. Only one IP address range can be specified by using the ip-range keyword on an interface. # Enable local proxy ARP on VLAN-interface 2. [Sysname] interface vlan-interface 2 17

27 [Sysname-Vlan-interface2] local-proxy-arp enable # Enable local proxy ARP on VLAN-interface 2 for an IP address range. [Sysname] interface vlan-interface 2 [Sysname-Vlan-interface2] local-proxy-arp enable ip-range to display local-proxy-arp proxy-arp enable Use proxy-arp enable to enable proxy ARP. Use undo proxy-arp enable to disable proxy ARP. proxy-arp enable undo proxy-arp enable Proxy ARP is disabled. VLAN interface view, Layer 3 Ethernet interface view, Layer 3 aggregate interface view Proxy ARP enables a device on a network to answer ARP requests for an IP address not on that network. With proxy ARP, hosts in different broadcast domains can communicate with each other as they do on the same network. Proxy ARP includes common proxy ARP and local proxy ARP. Common proxy ARP allows communication between hosts that connect to different Layer 3 interfaces and reside in different broadcast domains. Local proxy ARP allows communication between hosts that connect to the same Layer 3 interface and reside in different broadcast domains. # Enable proxy ARP on VLAN-interface 2. [Sysname] interface vlan-interface 2 [Sysname-Vlan-interface2] proxy-arp enable display proxy-arp 18

28 ARP snooping commands arp snooping enable Use arp snooping enable to enable ARP snooping. Use undo arp snooping enable to disable ARP snooping. arp snooping enable undo arp snooping enable ARP snooping is disabled. VLAN view # Enable ARP snooping on VLAN 2. [Sysname] vlan 2 [Sysname-vlan2] arp snooping enable display arp snooping Use display arp snooping to display ARP snooping entries. display arp snooping [ vlan vlan-id ] [ slot slot-number ] [ count ] display arp snooping ip ip-address [ slot slot-number ] Any view network-operator vlan vlan-id: Displays ARP snooping entries for a VLAN. The vlan-id argument is in the range of 1 to count: Displays the number of the current ARP snooping entries. ip ip-address: Displays the ARP snooping entry for the specified IP address. slot slot-number: Specifies an IRF member device. The slot-number argument is the member device ID in the IRF fabric. 19

29 If you do not specify any keywords or arguments, the command displays all ARP snooping entries. # Display ARP snooping entries for VLAN 2. <Sysname> display arp snooping vlan 2 IP Address MAC Address VLAN ID Interface Aging Status GE1/0/1 20 Valid GE1/0/2 5 Invalid # Display the number of the current ARP snooping entries. <Sysname> display arp snooping count Total entries: 2 Table 2 Command output Field IP Address MAC Address VLAN ID Interface Aging Status Total entries Description IP address in an ARP snooping entry. MAC address in an ARP snooping entry. ID of the VLAN to which the ARP snooping entry belongs. Input interface in an ARP snooping entry. Aging time for an ARP snooping entry in minutes. If the card learns an ARP snooping entry from another card, the card cannot learn the aging time of the entry, and this field displays N/A. Status of an ARP snooping entry: Valid, Invalid, Collision. Number of ARP snooping entries. reset arp snooping reset arp snooping Use reset arp snooping to remove ARP snooping entries. reset arp snooping [ ip ip-address vlan vlan-id ] User view ip ip-address: Removes the ARP entry for the specified IP address. vlan vlan-id: Removes the ARP entries for the specified VLAN. The vlan-id argument is in the range of 1 to If you do not specify any keywords or arguments, the command removes all ARP snooping entries. 20

30 # Remove ARP snooping entries for VLAN 2. <Sysname> reset arp snooping vlan 2 display arp snooping 21

31 IP addressing commands The IP addresses in this chapter refer to IPv4 addresses unless otherwise specified. The term "interface" in this chapter collectively refers to Layer 3 interfaces, including VLAN interfaces and Layer 3 Ethernet interfaces. You can set an Ethernet port as a Layer 3 interface by using the port link-mode route command (see Layer 2 LAN Switching Configuration Guide). display ip interface Use display ip interface to display IP configuration and statistics for the specified Layer 3 interface or all Layer 3 interfaces. display ip interface [ interface-type interface-number ] Any view network-operator interface-type interface-number: Specifies an interface by its type and number. Use the display ip interface command to display IP configuration and statistics for the specified Layer 3 interface. The statistics include the following information: The number of unicast packets, bytes, and multicast packets the interface has sent and received. The number of TTL-invalid packets and ICMP packets the interface has received. The packet statistics helps you locate a possible attack on the network. If you do not specify an interface, the command displays information about all Layer 3 interfaces. # Display IP configuration and statistics for VLAN-interface 10. <Sysname> display ip interface vlan-interface 10 Vlan-interface10 current state : DOWN Line protocol current state : DOWN Internet Address is /8 Primary Broadcast address : The Maximum Transmit Unit : 1500 bytes input packets : 0, bytes : 0, multicasts : 0 output packets : 0, bytes : 0, multicasts : 0 TTL invalid packet number: 0 ICMP packet input number: 0 Echo reply: 0 Unreachable: 0 Source quench: 0 22

32 Routing redirect: 0 Echo request: 0 Router advert: 0 Router solicit: 0 Time exceed: 0 IP header bad: 0 Timestamp request: 0 Timestamp reply: 0 Information request: 0 Information reply: 0 Netmask request: 0 Netmask reply: 0 Unknown type: 0 Table 3 Command output Field current state Line protocol current state Internet Address Broadcast address The Maximum Transmit Unit input packets, bytes, multicasts output packets, bytes, multicasts TTL invalid packet number Description Current physical state of the interface: Administrative DOWN The interface is shut down with the shutdown command. DOWN The interface is administratively up but its physical state is down, which might be caused by a connection or link failure. UP Both the administrative and physical states of the interface are up. Current state of the link layer protocol: DOWN The protocol state of the interface is down. UP The protocol state of the interface is up. UP (spoofing) The protocol state of the interface pretends to be up. However, no corresponding link is present, or the corresponding link is not present permanently but is established as needed. IP address of an interface followed by: Primary A primary IP address. Sub A secondary IP address. DHCP-Allocated An IP address obtained through DHCP. BOOTP-Allocated An IP address obtained through BOOTP. Cluster A cluster IP address. Mad A MAD IP address. Broadcast address of the subnet attached to an interface. Maximum transmission units on the interface, in bytes. Unicast packets, bytes, and multicast packets received on an interface (statistics start at the device startup). Number of TTL-invalid packets received on the interface (statistics start at the device startup). 23

33 Field ICMP packet input number: Echo reply: Unreachable: Source quench: Routing redirect: Echo request: Router advert: Router solicit: Time exceed: IP header bad: Timestamp request: Timestamp reply: Information request: Information reply: Netmask request: Netmask reply: Unknown type: Description Total number of ICMP packets received on the interface (statistics start at the device startup): Echo reply packets. Unreachable packets. Source quench packets. Routing redirect packets. Echo request packets. Router advertisement packets. Router solicitation packets. Time exceeded packets. IP header bad packets. Timestamp request packets. Timestamp reply packets. Information request packets. Information reply packets. Netmask request packets. Netmask reply packets. Unknown type packets. display ip interface brief ip address display ip interface brief Use display ip interface brief to display brief IP configuration information for the specified Layer 3 interface or all Layer 3 interfaces. display ip interface [ interface-type [ interface-number ] ] brief Any view network-operator interface-type: Specifies the interface type. interface-number: Specifies the interface number. Use the display ip interface brief command to display brief IP configuration information, including the state, IP address, and description of the physical and link layer protocols, for the specified Layer 3 interface or all Layer 3 interfaces. If you do not specify the interface type and interface number, the command displays the brief IP configuration information for all Layer 3 interfaces. 24

34 If you specify only the interface type, the command displays the brief IP configuration information for all Layer 3 interfaces of the specified type. If you specify both the interface type and interface number, the command displays the brief IP configuration information for the specified interface. # Display brief IP configuration information for VLAN interfaces. <Sysname> display ip interface vlan-interface brief *down: administratively down (s): spoofing (l): loopback Interface Physical Protocol IP Address Description Vlan10 down down Vlan-inte... Vlan2 down down Vlan-inte... Table 4 Command output Field *down: administratively down (s) : spoofing Interface Physical Protocol IP Address Description Description The interface is administratively shut down with the shutdown command. Spoofing attribute of the interface. It indicates that an interface might have no link present even when its link layer protocol is up or the link is established only on demand. Interface name. Physical state of the interface: *down The interface is administratively shut down with the shutdown command. down The interface is administratively up but its physical state is down (possibly because of poor connection or line failure). up Both the administrative and physical states of the interface are up. Link layer protocol state of the interface: down The protocol state of the interface is down (typically when no IP address is configured for the interface). up The protocol state of the interface is up. up(s) The protocol state of the interface is up (spoofing). IP address of the interface. If no IP address is configured, unassigned is displayed. Interface description information. A maximum of 12 characters can be displayed. If there are more than 12 characters, only the first 9 characters are displayed. display ip interface ip address ip address Use ip address to assign an IP address to the interface. Use undo ip address to remove the IP address from the interface. ip address ip-address { mask-length mask } [ sub ] 25

35 undo ip address [ ip-address { mask-length mask } [ sub ] ] No IP address is assigned to an interface. Interface view ip-address: Specifies the IP address of the interface, in dotted decimal notation. mask-length: Specifies the subnet mask length in the range of 1 to 31. For a loopback interface, the value range is 1 to 32. mask: Specifies the subnet mask in dotted decimal notation. sub: Assigns a secondary IP address to the interface. Use the command to configure a primary IP address for an interface. If the interface connects to multiple subnets, configure primary and secondary IP addresses on the interface so the subnets can communicate with each other through the interface. An interface can have only one primary IP address. A newly configured primary IP address overwrites the previous address. You cannot assign secondary IP addresses to an interface that obtains an IP address through BOOTP, DHCP, or IP unnumbered. The undo ip address command removes all IP addresses from the interface. The undo ip address ip-address { mask mask-length } command removes the primary IP address. The undo ip address ip-address { mask mask-length } sub command removes a secondary IP address. Before removing the primary IP address, remove all secondary IP addresses. The primary and secondary IP addresses you assign to the interface can be located on the same network segment, but different interfaces on your device must reside on different network segments. # Assign VLAN-interface 10 a primary IP address and a secondary IP address , with subnet masks both [Sysname] interface vlan-interface 10 [Sysname-Vlan-interface10] ip address [Sysname-Vlan-interface10] ip address sub display ip interface display ip interface brief ip address unnumbered Use ip address unnumbered to configure the current interface as IP unnumbered to borrow an IP address from the specified interface. Use undo ip address unnumbered to disable IP unnumbered on the interface. 26

36 ip address unnumbered interface interface-type interface-number undo ip address unnumbered The interface does not borrow IP addresses from other interfaces. Tunnel interface view interface interface-type interface-number: Specifies an interface from which the current interface can borrow an IP address. Typically, you assign an IP address to an interface either manually or through DHCP. If the IP addresses are not enough, or the interface is used only occasionally, you can configure an interface to borrow an IP address from other interfaces. This is called IP unnumbered, and the interface borrowing the IP address is called IP unnumbered interface. Multiple interfaces can use the same unnumbered IP address. If an interface has multiple manually configured IP addresses, only the primary IP address manually configured can be borrowed. You cannot enable a dynamic routing protocol on the interface that has no IP address configured. To enable the interface to communicate with other devices, you must configure a static route to the peer device on the interface. Before entering tunnel interface view, make sure the tunnel interface has been created. For information about tunnel interface, see Layer 3 IP Services Configuration Guide. # Configure the interface Tunnel 1 to borrow the IP address of VLAN-interface 100. [Sysname] interface tunnel 1 [Sysname-Tunnel1] ip address unnumbered interface vlan-interface

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