Chapter 20 IPv6 BGP Unicast Address Family Commands

Transcription

1 Chapter 20 IPv6 BGP Unicast Address Family Commands NOTE: The IPv6 BGP unicast address family configuration level is present only on HP devices that support IPv6 and the ProCurve 9408sl Routing Switch only. address-family Allows you to enter the following configuration levels: BGP4 unicast address family While at this level, you can access commands that allow you to configure BGP4 unicast routes. The commands that you enter at this level apply only to the BGP4 unicast address family only. You can generate a configuration for BGP4 unicast routes that is separate and distinct from configurations for BGP4 multicast routes and IPv6 BGP unicast routes. BGP4 multicast address family While at this level, you can access commands that allow you to configure BGP4 multicast routes. The commands that you enter at this level apply only to the BGP4 multicast address family only. You can generate a configuration for BGP4 multicast routes that is separate and distinct from configurations for BGP4 unicast routes and IPv6 BGP unicast routes. IPv6 BGP unicast address family While at this level, you can access commands that allow you to configure IPv6 BGP unicast routes. The commands that you enter at this level apply only to the IPv6 BGP unicast address family only. You can generate a configuration for IPv6 BGP unicast routes that is separate and distinct from configurations for BGP4 unicast routes and BGP4 multicast routes. NOTE: Each address family configuration level allows you to access commands that apply to that particular address family only. To enable a feature in a particular address family, you must specify any associated commands for that feature in that particular address family. You cannot expect the feature, which you may have configured in the BGP4 unicast address family, to work in the IPv6 BGP unicast address family unless it is explicitly configured in the IPv6 BGP unicast address family. For backward compatibility, you can currently access commands related to BGP4 unicast routes at both global BGP configuration and BGP4 unicast address family configuration levels. Both of these levels are indicated by the (config-bgp)# prompt. For information about the commands that you can access in the BGP global and BGP4 unicast address family levels, see Global BGP and BGP4 Unicast Address Family Commands on page For information about the commands that you can access from the BGP4 multicast address family level, see BGP4 Multicast Address Family Commands on page To enter the BGP4 unicast address family configuration level, enter a command such as the following: ProCurveRS(config-bgp)# address-family ipv4 unicast June

2 Command Line Interface Reference for ProCurve 9300/9400 Series Routing Switches ProCurveRS(config-bgp)# The (config-bgp)# prompt indicates that you are at the default BGP4 level, where you can access both global BGP and BGP4 unicast address family commands. To enter the IPv4 BGP multicast address family configuration level, enter a command such as the following: ProCurveRS(config-bgp)# address-family ipv4 multicast ProCurveRS(config-bgp-ipv4m)# The (config-bgp-ipv4m)# prompt indicates that you are at the IPv4 BGP multicast address family configuration level. To enter the IPv6 BGP unicast address family configuration level, enter a command such as the following: ProCurveRS(config-bgp)# address-family ipv6 unicast ProCurveRS(config-bgp-ipv6u)# The (config-bgp-ipv6u)# prompt indicates that you are at the IPv6 BGP unicast address family configuration level. Syntax: address-family ipv4 unicast ipv4 multicast ipv6 unicast Specify the ipv4 unicast, ipv4 multicast, and ipv6 unicast keywords to enter the BGP4 unicast, BGP4 multicast, and IPv6 BGP unicast address family configuration levels, respectively. aggregate-address Configures an HP device that supports IPv6 to aggregate routes in a range of networks into a single IPv6 prefix. For example, without aggregation, an HP device will individually advertise routes for networks ff00:f000:0001:0000::/64, ff00:f000:0002:0000::/64,ff00:f000:0003:0000::/64, and so on. You can configure the device to instead send a single, aggregate route for the networks. The aggregate route would be advertised as ff00:f000::/24 to IPv6 BGP neighbors. To aggregate IPv6 BGP routes for ff00:f000:0001:0000::/64, ff00:f000:0002:0000::/64,ff00:f000:0003:0000::/64, enter a command such as the following: ProCurveRS(config-bgp-ipv6u)# aggregate-address ff00:f000::/24 summary-only Syntax: aggregate-address <ipv6-prefix>/<prefix-length> [as-set] [summary-only] [suppress-map <map-name>] [advertise-map <map-name>] [attribute-map <map-name>] The <ipv6-prefix>/<prefix-length> parameter specifies the aggregate value for the networks. You must specify the <ipv6-prefix> parameter in hexadecimal using 16-bit values between colons as documented in RFC You must specify the <prefix-length> parameter as a decimal value. A slash mark (/) must follow the <ipv6-prefix> parameter and precede the <prefix-length> parameter. The as-set keyword causes the router to aggregate AS-path information for all the routes in the aggregate address into a single AS-path. The summary-only keyword prevents the router from advertising more specific routes contained within the aggregate route. The suppress-map <map-name> parameter prevents the more specific routes contained in the specified route map from being advertised. The advertise-map <map-name> parameter configures the router to advertise the more specific routes in the specified route map. The attribute-map <map-name> parameter configures the router to set attributes for the aggregate routes based on the specified route map June 2005

3 IPv6 BGP Unicast Address Family Commands NOTE: For the suppress-map, advertise-map, and attribute-map parameters, the route map must already be defined. To remove an aggregate route from a BGP4 neighbor advertisement, use the no form of this command without any parameters. Default value: An HP device advertises individual IPv6 BGP routes for all the networks. client-to-client-reflection Disables or re-enables route reflection. For more information about route reflection, see the "Configuring BGP4" chapter of the Advanced Configuration and Management Guide for ProCurve 9300/9400 Series Routing Switches. If you need to disable route reflection on an HP device that supports IPv6, enter the following command. Disabling route reflection allows you to turn off the feature without removing Cluster ID and route reflector client information from the system configuration file. ProCurveRS(config-bgp-ipv6u)# no client-to-client-reflection Enter the following command to re-enable the feature: ProCurveRS(config-bgp-ipv6u)# client-to-client-reflection Syntax: [no] client-to-client-reflection Default value: Enabled dampening Configures route flap dampening. This section shows how to globally configure dampening. You also can use route maps to configure dampening for specify neighbors and routes. The following example shows how to change the dampening parameters. ProCurveRS(config-bgp-ipv6u)# dampening This command changes the half-life to 20 minutes, the reuse threshold to 200, the suppression threshold to 2500, and the maximum number of minutes a route can be dampened to 40. Syntax: dampening [<half-life> <reuse> <suppress> <max-suppress-time>] The <half-life> parameter specifies the number of minutes after which the route s penalty becomes half its value. The route penalty allows routes that have remained stable for a while despite earlier instability to eventually become eligible for use again. The decay rate of the penalty is proportional to the value of the penalty. After the half-life expires, the penalty decays to half its value. Thus, a dampened route that is no longer unstable can eventually become eligible for use again. You can configure the half-life to be from 1 45 minutes. The default is 15 minutes. The <reuse> parameter specifies how low a route s penalty must become before the route becomes eligible for use again after being suppressed. You can set the reuse threshold to a value from The default is 750 (0.75, or three-fourths, of the penalty assessed for a one flap ). The <suppress> parameter specifies how high a route s penalty can become before the Routing Switch suppresses the route. You can set the suppression threshold to a value from The default is 2000 (two flaps ). The <max-suppress-time> parameter specifies the maximum number of minutes that a route can be suppressed regardless of how unstable it is. You can set the maximum suppression time to a value from minutes. June

4 Command Line Interface Reference for ProCurve 9300/9400 Series Routing Switches The default is four times the half-life setting. Thus, if you use the default half-life of 15 minutes, the maximum suppression time is 60 minutes. NOTE: To change any of the parameters, you must specify all the parameters with the command. If you want to leave some parameters unchanged, enter their default values. Default value: Disabled default-information-originate Enables an HP device that supports IPv6 to originate and advertise a default IPv6 BGP route. A default route is the IPv6 address :: and the route prefix 0; that is, ::/0. Before entering the default-information-originate command, the default route ::/0 must be present in the IPv6 route table. You can also enable the HP device to send the default route to a particular neighbor using the neighbor <ipv6 address> default-originate command. This command does not require the presence of the default route ::/0 in the IPv6 route table. For more information, see neighbor <ipv6-address> default-originate on page ProCurveRS(config-bgp-ipv6u)# default-information-originate Syntax: [no] default-information-originate. Default value: The HP device does not originate and advertise a default IPv6 BGP route. default-metric Sets the default IPv6 BGP MED (metric), a global parameter that specifies the cost that will be applied to all routes by default when they are redistributed into IPv6 BGP. When routes are selected, lower metric values are preferred over higher metric values. To change the default metric to 40, enter the following command: ProCurveRS(config-bgp-ipv6u)# default-metric 40 Syntax: default-metric <num> Possible values: Default value: 0 end Moves activity to the privileged EXEC level from any level of the CLI except the user EXEC level. To move to the privileged level, enter the following from any level of the CLI. ProCurveRS(config-bgp-ipv6u)# end ProCurveRS# Syntax: end exit Moves activity up one level from the current level. In this case, activity will be moved to the global level. ProCurveRS(config-bgp-ipv6u)# exit 20-4 June 2005

5 IPv6 BGP Unicast Address Family Commands ProCurveRS(config)# Syntax: exit exit-address-family Allows you to exit from the IPv6 BGP unicast address family configuration level and return to the default BGP level, where you can access both global BGP and BGP4 unicast address family commands. ProCurveRS(config-bgp-ipv6u)# exit-address-family ProCurveRS(config-bgp)# The (config-bgp)# prompt indicates that you are at the default BGP level. Syntax: exit-address-family maximum-paths Changes the maximum number of shared paths. When IP load sharing is enabled, IPv6 BGP can balance traffic to a specific destination across up to four equal paths. You can set the maximum number of paths to a value from 1 8. The default is 1. NOTE: The maximum number of IPv6 BGP load sharing paths cannot be greater than the maximum number of IP load sharing paths. To increase the maximum number of IP load sharing paths, use the ip load-sharing <num> command at the global CONFIG level of the CLI or use the # of Paths field next to Load Sharing on the IP configuration panel of the Web management interface. To change the maximum number of shared paths: ProCurveRS(config-bgp-ipv6u)# maximum-paths 4 Syntax: [no] maximum-paths <num> Possible values: The <num> parameter specifies the maximum number of paths across which the Routing Switch can balance traffic to a given IPv6 BGP destination. You can change the maximum number of paths to a value from 2 8. Default value: The default is 1. multipath Disables load sharing of EBGP paths. By default, when IPv6 BGP load sharing is enabled, both IBGP and EBPG paths are eligible for load sharing, while paths from different neighboring ASs are not eligible. You can change load sharing to apply only to IBGP or EBGP paths, or to support load sharing among paths from different neighboring ASs. To enable load sharing of IBGP paths only, enter the following command: ProCurveRS(config-bgp-ipv6u)# multipath ibgp To enable load sharing of EBGP paths only, enter the following command: ProCurveRS(config-bgp-ipv6u)# multipath ebgp To enable load sharing of paths from different neighboring ASs, enter the following command: ProCurveRS(config-bgp-ipv6u)# multipath multi-as June

6 Command Line Interface Reference for ProCurve 9300/9400 Series Routing Switches Syntax: [no] multipath ebgp ibgp multi-as The ebgp ibgp multi-as parameter specifies the change you are making to load sharing: ebgp Load sharing applies only to EBGP paths. Load sharing is disabled for IBGP paths. ibgp Load sharing applies only to IBGP paths. Load sharing is disabled for EBGP paths. multi-as Load sharing is enabled for paths from different ASs. By default, load sharing applies to EBGP and IBGP paths, and does not apply to paths from different neighboring ASs.. Default value: Load sharing of IBGP and EBGP paths is enabled. neighbor <ipv6-address> default-originate Enables the HP device that supports IPv6 to send the default route to a particular neighbor. Using the neighbor <ipv6-address> default-originate command to perform this task does not require the presence of the default route ::/0 in the IPv6 route table. To enable the HP device to send the default route to a neighbor with the IPv6 address of 2001:efff:89::23, enter a command such as the following: ProCurveRS(config-bgp-ipv6u)# neighbor 2001:efff:89::23 default-originate Syntax: [no] neighbor <ipv6-address> default-originate [route-map <name>] The <ipv6-address> parameter specifies a neighbor by its IPv6 address. You must specify this address in hexadecimal using 16-bit values between colons as documented in RFC Specifying the optional route-map <name> parameter injects the default route conditionally, based on the match conditions in the route map. Default value: The HP device does not send the default route to neighbors. neighbor <ipv6-address> peer-group <peer-group-name> Adds a neighbor to a peer group. If an HP device that supports IPv6 has multiple neighbors with similar attributes, you can configure a peer group, then add neighbors to the group instead of configuring neighbors individually. NOTE: You can add IPv6 neighbors only to an IPv6 peer group. You cannot add an IPv4 neighbor to an IPv6 peer group and vice versa. IPv6 and IPv4 peer groups must remain separate. To assign an already configured neighbor (2001:efff:89::23) to the peer group peer_group1, enter a command such as the following: ProCurveRS(config-bgp-ipv6u)# neighbor 2001:efff:89::23 peer-group peer_group1 Syntax: neighbor <ipv6-address> peer-group <peer-group-name> The <ipv6-address> parameter specifies the IPv6 address of the neighbor. You must specify the <ipv6-address> parameter in hexadecimal using 16-bit values between colons as documented in RFC The peer-group <peer-group-name> parameter indicates the name of the already created peer group. To delete the mapping of the neighbor IPv6 address to the peer group, enter the no form of this command. neighbor <peer-group-name> peer-group 20-6 June 2005

7 IPv6 BGP Unicast Address Family Commands Configures a peer group. If an HP device that supports IPv6 has multiple neighbors with similar attributes, you can configure a peer group, then add neighbors to the group instead of configuring neighbors individually. NOTE: You can add IPv6 neighbors only to an IPv6 peer group. You cannot add an IPv4 neighbor to an IPv6 peer group and vice versa. IPv6 and IPv4 peer groups must remain separate. To create a peer group named peer_group1, enter a command such as the following: ProCurveRS(config-bgp-ipv6u)# neighbor peer_group1 peer-group Syntax: neighbor <peer-group-name> peer-group The <peer-group-name> parameter Specifies a name for the peer group. To delete the peer group, enter the no form of this command. neighbor <ipv6-address> remote-as <as-number> Configures IPv6 BGP neighbors using global, site-local, or link-local IPv6 addresses. To do so, you must add the IPv6 address of a neighbor in a remote AS to the IPv6 BGP neighbor table of the local HP device that supports IPv6. You must repeat this procedure for each neighbor that you want to add to a local device. To add the global IPv6 address 2011:f3e9:93e8:cc00::1 of a neighbor in remote AS 4500 to the IPv6 BGP neighbor table of an HP device, enter a command such as the following: ProCurveRS(config-bgp-ipv6u)# neighbor 2011:f3e9:93e8:cc00::1 remote-as 4500 Syntax: neighbor <ipv6-address> remote-as <as-number> NOTE: The example above adds an IPv6 neighbor at the IPv6 BGP unicast address family configuration level. This neighbor, by default, is enabled to exchange IPv6 BGP unicast prefixes. However, if you add an IPv6 neighbor while at the global BGP configuration/ipv4 BGP unicast address family configuration level, the neighbor will not exchange IPv6 BGP unicast prefixes until you explicitly enable it to do so by entering the neighbor <ipv6 address> <peer-group-name> activate command at the IPv6 BGP unicast address family configuration level. The <ipv6-address> parameter specifies the global or site-local IPv6 address of the neighbor. You must specify the <ipv6-address> parameter in hexadecimal using 16-bit values between colons as documented in RFC The <as-number> parameter indicates the number of the AS in which the neighbor resides. To delete the neighbor from the IPv6 BGP neighbor table, enter the no form of this command. neighbor <ipv6-address> route-map [in out] <name> Configures a route map that filters routes advertised to a neighbor or sets up a global next hop for packets destined for a neighbor with a IPv6 link-local address. To configure a route map that applies to the outgoing routes on the neighbor with the IPv6 link-local address fe80:4393:ab30:45de::1, enter commands such as the following: ProCurveRS(config-bgp-ipv6u)# neighbor fe80:4398:ab30:45de::1 route-map out next hop ProCurveRS(config-bgp-ipv6u)# exit ProCurveRS(config)# route-map next-hop permit 10 ProCurveRS(config-route-map)# match ipv6 address prefix-list next-hop-ipv6 June

8 Command Line Interface Reference for ProCurve 9300/9400 Series Routing Switches ProCurveRS(config-route-map)# set ipv6 next-hop 2011:e0ff:3764::34 If an outgoing route on the neighbor matches the route map, the route is distributed via the next hop router with the global IPv6 address 2011:e0ff:3764::34. Syntax: neighbor <ipv6-address> route-map [in out] <name> The <ipv6-address> parameter specifies the IPv6 link-local address of the neighbor. A link-local address has a fixed prefix of FE80::/10. You must specify the <ipv6-address> parameter in hexadecimal using 16-bit values between colons as documented in RFC The in keyword applies the route map to incoming routes. The out keyword applies the route map to outgoing routes. The <name> parameter specifies a route map name. neighbor <ipv6-address> update-source <ipv4-address> <interface> Identifies a neighbor interface over which a neighbor and a local HP device that supports IPv6 will exchange prefixes. To specify Ethernet interface 1 as the neighbor interface over which the neighbor and local device will exchange prefixes, enter a command such as the following: ProCurveRS(config-bgp-ipv6u)# neighbor fe80:4398:ab30:45de::1 update-source ethernet 1 Syntax: neighbor <ipv6-address> update-source <ipv4-address> ethernet <port> loopback <number> ve <number> The <ipv6-address> parameter specifies the IPv6 link-local address of the neighbor. A link-local address has a fixed prefix of FE80::/10. You must specify the <ipv6-address> parameter in hexadecimal using 16-bit values between colons as documented in RFC The <ipv4-address> parameter specifies the IPv4 address of the update source. The ethernet loopback ve parameter specifies the neighbor interface over which the neighbor and local router will exchange prefixes. If you specify an Ethernet interface, also specify the port number associated with the interface. If you specify a loopback or VE interface, also specify the loopback or VE number. network Enables an HP device that supports IPv6 to import specified routes into IPv6 BGP. NOTE: The routes imported into IPv6 BGP must first exist in the IPv6 unicast route table. To import the IPv6 prefix 3ff0:ec21::/32 into the IPv6 BGP database, enter a command such as the following: ProCurveRS(config-bgp-ipv6u)# network 3ff0:ec21::/32 Syntax: network <ipv6-prefix>/<prefix-length> [route-map <name>] You must specify the <ipv6-prefix> parameter in hexadecimal using 16-bit values between colons as documented in RFC You must specify the <prefix-length> parameter as a decimal value. A slash mark (/) must follow the <ipv6-prefix> parameter and precede the <prefix-length> parameter June 2005

9 IPv6 BGP Unicast Address Family Commands You can specify the optional route-map <name> parameter if you want to change attributes of a route when importing it into IPv6 BGP. To disable the importing of a specified route, enter the no form of this command without the route-map parameter. Default value: The HP device does not import routes into IPv6 BGP. next-hop-enable-default Enables the HP device that supports IPv6 to use the default IPv6 route to resolve an IPv6 BGP next-hop route. By default, the HP device does not use a default route to resolve an IPv6 BGP next-hop route. If the IPv6 route lookup for the IPv6 BGP next hop does not result in a valid IGP route (including static or direct routes), the IPv6 BGP next hop is considered to be unreachable and the IPv6 BGP route is not used. In some cases, such as when the HP device is acting as an edge router, you might want to allow the device to use the default route as a valid next hop. ProCurveRS(config-bgp-ipv6u)# next-hop-enable-default Syntax: [no] next-hop-enable-default Default value: Disabled no Disables other commands. To disable a command, place the word no before the command. quit Returns you from any level of the CLI to the User EXEC mode. ProCurveRS(config-bgp-ipv6u)# quit ProCurveRS> Syntax: quit redistribute Configures the HP device that supports IPv6 to redistribute routes from the following sources into IPv6 BGP: Static IPv6 routes. Directly connected IPv6 networks. OSPF version 3. IPv6 RIP. You can redistribute routes in the following ways: By route types, for example, the router redistributes all IPv6 static and IPv6 RIP routes. By using a route map to filter which routes to redistribute, for example, the router redistributes specified IPv6 static and IPv6 RIP routes only. To configure the redistribution of all IPv6 RIP routes into the IPv6 BGP unicast database, enter a command such as the following: ProCurveRS(config-bgp-ipv6u)# redistribute rip June

10 Command Line Interface Reference for ProCurve 9300/9400 Series Routing Switches show Syntax: redistribute <protocol> [level-1 level-1-2 level-2] [match external1 external2 internal] [metric <metricvalue>] [route-map <name>] The <protocol> parameter can be connected, isis, ospf, rip, or static. If you specify isis as the protocol, you can optionally specify the redistribution of level 1, level 1 and 2, or level 2 routes. If you specify ospf as the protocol, you can optionally specify the redistribution of external 1, external 2, or internal routes. (The default is internal.) The metric <metric-value> parameter specifies the metric used for the redistributed route. If a value is not specified for this option, and no value is specified using the default-metric command at the IPv6 BGP unicast address family configuration level, the metric value for the IPv6 static, IPv6 RIP, or IPv6 OSPF route is used. Use a value consistent with the destination protocol. For more information about the default-metric command, see the Configuring BGP4 chapter in the Advanced Configuration and Management Guide for ProCurve 9300/9400 Series Routing Switches. The <name> parameter specifies a route map name. Default value: The HP device does not redistribute routes from other sources into IPv6 BGP. Displays a variety of configuration and statistical information about the device. See Show Commands on page table-map Configures an existing route map to change the route tag in routes when adding them to the IPv6 route table. To create a route map and identify it as a table map, enter commands such as following. These commands create a route map that uses an address filter. For routes that match the address filter, the route map changes the tag value to 100. This route map is then identified as a table map. As a result, the route map is applied only to routes that the HP device that supports IPv6 places in the IPv6 route table. The route map is not applied to all routes. This example assumes that address filter 11 has already been configured. ProCurveRS(config)# route-map TAG_IP permit 1 ProCurveRS(config-routemap TAG_IP)# match address-filters 11 ProCurveRS(config-routemap TAG_IP)# set tag 100 ProCurveRS(config-routemap TAG_IP)# router bgp ProCurveRS(config-bgp)# address-family ipv6 unicast ProCurveRS(config-bgp-ipv6u)# table-map TAG_IP Syntax: table-map <route-map> Possible values: a route-map name update-time Changes the IPv6 BGP update timer. The update timer controls how often the HP device that supports IPv6 updates its IPv6 BGP next-hop tables and affected IPv6 BGP routes. By default, the HP device updates its IPv6 BGP next-hop tables and affected IPv6 BGP routes five seconds after IGP route changes. ProCurveRS(config-bgp-ipv6u)# update-time 15 This command changes the update timer to 15 seconds. Syntax: [no] update-time <secs> June 2005

11 IPv6 BGP Unicast Address Family Commands The <secs> parameter specifies the number of seconds and can be from Possible values: 1 30 seconds after IGP route changes Default value: 5 seconds after IGP route changes write memory Saves the running configuration into the startup-config file. ProCurveRS(config-bgp-ipv6u)# write memory Syntax: write memory write terminal Displays the running configuration of the HP device that supports IPv6 on the terminal screen. NOTE: This command is equivalent to the show running-config command. ProCurveRS(config-bgp-ipv6u)# write terminal Syntax: write terminal June

12 Command Line Interface Reference for ProCurve 9300/9400 Series Routing Switches June 2005