Disjoint Layer2 Uplinks (DLU)

Transcription

1 Disjoint Layer2 Uplinks (DLU) 1

2 Overview In UCS release 1.4, network facing interfaces are configured to support all VLANs in the system. There is no way to configure a subset of VLANs on a network facing interface. A single network-facing interface is selected to receive multicast/broadcast traffic from the upstream network. This limits UCS to deployments where the upstream networks are symmetrical (all LAN segments are reachable by each border interface). Only workaround prior to 2.x was Switch Mode Brad Hedlund explains Disjoint Layer 2 concepts and workarounds concerning 1.4 and earlier: nbucshu38 2

3 Disjoint Layer 2 Sample Topology Network Prod1 VLANs Network Dev 2 VLANs Backup Network VLAN 31 BIF2 BIF1 BIF3 BIF1 BIF2 BIF3 UCS A UCS B Assumptions There is no overlap in VLAN IDs between the disparate networks Both FI s have access to the same set of VLANs. This ensures the function of fabric failover. 3

4 Disjoint L2 Configuration Overview Define all necessary VLANs 4

5 Disjoint L2 Configuration Overview Launch LAN Uplink Manager 5

6 Disjoint L2 Configuration Overview Associate VLANs with Uplinks 6

7 Disjoint L2 Configuration Overview Verifying Configuration From UCSM CLI NXOS Context: show interface trunk Should expect to see your associated VLANs on the assigned interfaces only. Ex. Eth 1/16-17 are Uplinks Port Vlans Allowed on Trunk Eth1/16 1,5-7,1000,3000 Only Eth1/16 allows VLAN 5 Eth1/17 1,6-7,1000,3000 Veth Veth709 1,1000 <snip> 7

8 Service Profile Circuit Paths A server s virtual interface (VIF) mapping can be displayed with the show service-profile circuit command. The VIF number can be used in the NXOS level of the FI to trace a path to the upstream. UCS-B# show service-profile circuit server 1/1 Service Profile: root/esxi_3 Server: 1/1 Fabric ID: A VIF vnic Link State Overall Status Admin Pin Oper Pin Transport Unknown Unknown 0/0 0/0 Unknown 9158 Up Active 0/0 0/0 Ether 964 eth0 Up Active 0/0 0/3 Ether 966 fc0 Up Active 0/0 0/0 Fc Fabric ID: B VIF vnic Link State Overall Status Admin Pin Oper Pin Transport Unknown Unknown 0/0 0/0 Unknown 9159 Up Active 0/0 0/0 Ether 965 eth1 Up Active 0/0 0/3 Ether 967 fc1 Up Active 0/0 0/0 Fc 8

9 Active Border Interfaces The interface a VIF will use to reach the upstream network can be determined by analyzing the active border-interfaces on the FI: UCS-B(nxos)# show pinning border-interfaces active Border Interface Status SIFs Eth1/7 Active Veth729, Veth730 Eth1/8 Active Veth731 Eth1/9 Active Veth732 Eth1/16 Active Veth733 Eth1/17 Active Eth1/18 Active Eth1/19 Active Eth2/1/29 Eth1/20 Active Veth706 Eth1/21 Active Eth1/22 Active Total Interfaces : 10 FI-6248-B(nxos)# 9

10 Determining DR for Bcast & Mcast The Designated Receiver (DR) port can be determined by: UCS-B(nxos)# show platform software enm internal info vlandb [id x] all vlan_id Designated receiver: Eth1/8 Membership: Eth1/8 Eth1/9 Eth1/16 Eth1/18 Eth1/19 Eth1/20 Eth1/21 Eth1/22 Eth1/17 vlan_id Designated receiver: Eth1/16 Membership: Eth1/16 <snip> 10

11 Disjoint Layer 2 Notes Default behavior is same as pre-2.0. VLANs will be allowed on all interfaces. If no interfaces are implicitly assigned to a VLAN, then default behavior will be implemented & that VLAN will be allowed on all interfaces (traffic dynamically pinned in Round Robin fashion) In UCSM 2.0, a designated broadcast/multicast receiver is allocated on a per VLAN basis rather than on a global basis. For a downgrade, disjoint Layer 2 config should be removed as it will not be supported in versions prior to UCSM 2.0 and may cause traffic disruption. 11

12 12