Руководство По Проектированию для Cisco Cisco Nexus 5010 Switch

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You can verify the spanning-tree configuration as follows:

show spanning-tree summary

Switch is in rapid-pvst mode

Root bridge for: VLAN0212

Port Type Default is disable

If you are using MST, the MST region configuration must match the MST region configuration on the Cisco Nexus

7000 Series Switch, or more generally on the aggregation-layer switch. Failure to create matching configurations

creates two regions that still interoperate through Rapid PVST+; however, the steady-state configuration should

really comprise a single region.

spanning-tree mode mst

spanning-tree pathcost method long

spanning-tree mst configuration

name dc1

revision 3

instance 1 vlan 1-4093

If you are using MST, be sure to configure the region mapping for all VLANs even if you are not using them all.

This configuration does not have any hardware or CPU resource use costs until the VLAN is created and assigned

to interfaces.

Host ports on the Cisco Nexus 5000 Series should be configured as type edge to enable PortFast with or without

BPDU filtering:

spanning-tree port type edge

Cisco Nexus 5000 Series in vPC Mode

The spanning-tree configuration best practices for vPC mode are identical to the best practices described in the

previous section except that you can also configure the MST region definition using config-sync.

You may want to disable loop guard if you plan to use the Cisco Nexus 5000 Series in vPC mode. Loop guard is

not useful in vPC topologies.

The spanning-tree mode needs to be configured independently on both Cisco Nexus 5000 Series Switches:

config t

spanning-tree mode mst

spanning-tree pathcost method long

no spanning-tree loopguard default

spanning-tree mst configuration

name dc1

revision 3

instance 1 vlan 1-4093

Repeat the preceding configuration on both (future) vPC peers.

At this point, the MST region definition is identical on both Cisco Nexus 5000 Series peers.