Техническая Инструкция для Cisco Cisco Nexus 5010 Switch

Spanning Tree and FCoE VLANs

FCoE VLANs are a special case and should not exist in the spanning tree.

bdsol-n5548-05# show spanning-tree vlan 970

Spanning tree instance(s) for vlan does not exist.

A special case exists for Multiple Spanning Tree (MST) and FCoE VLANs. An instance of MST
needs to be created in order to carry FCoE VLANs, and not other VLANs. See

MST Instances For

Dual Fabric FCoE Deployments

VPC and FCoE VLANs

In the previous example, FCoE VLANs are added on VPCs and VPCs are on two different
devices. The configuration for trunking is slightly different for each VPC.

The FCoE VLANs will not show up as allowed VLANs in the VPC consistency check.

bdsol-n5548-05# show vpc consistency-parameters vpc 105

Legend:

Type 1 : vPC will be suspended in case of mismatch

Name Type Local Value Peer Value

------------- ---- ---------------------- -----------------------

Shut Lan 1 No No

STP Port Type 1 Default Default

STP Port Guard 1 None None

STP MST Simulate PVST 1 Default Default

lag-id 1 [(1, 2-a0-98-40-ba-fa, [(1, 2-a0-98-40-ba-fa,

1, 0, 0), (7f9b, 1, 0, 0), (7f9b,

0-23-4-ee-be-35, 8069, 0-23-4-ee-be-35, 8069,

0, 0)] 0, 0)]

mode 1 active active

Speed 1 10 Gb/s 10 Gb/s

Duplex 1 full full

Port Mode 1 trunk trunk

Native Vlan 1 1 1

MTU 1 1500 1500

Admin port mode 1

Allowed VLANs - 3380 3380

Local suspended VLANs - - -

This is expected.

In order to verify that the FCoE VLANs are trunked, verify per-interface trunking.

bdsol-n5548-05# show interface port-channel 105 trunk

--------------------------------------------------------------------------------

Port Native Status Port

Vlan Channel

--------------------------------------------------------------------------------

Po105 1 trunking --

--------------------------------------------------------------------------------

Port Vlans Allowed on Trunk

--------------------------------------------------------------------------------

Po105 970,3380