Connectivity Guide

Supported
Releases
10.3.0E or later
primary-priority
Configures the priority when selecting the primary and secondary VLT peers during election.
Syntax
primary-priority value
Parameters value — Enter a lower value than the priority value of the remote peer. The range is from 1 to 65535.
The default value is 32768.
Default 32768.
Command Mode VLT-DOMAIN
Usage
Information
● After you configure a VLT domain on each peer switch and connect the two VLT peers on each side
of the VLT interconnect, the system elects a primary and secondary VLT peer device. To configure
the primary and secondary roles before the election process, use the primary-priority command.
Enter a lower value on the primary peer and a higher value on the secondary peer. If the primary peer
fails, the secondary peer (with the higher priority) takes the primary role. If the primary peer (with the
lower priority) later comes back online, it is assigned the secondary role; there is no preemption.
● If the priority values configured on the two VLT peers are equal, VLT uses the default primary election
mechanism based on the values of the system MAC addresses of the two nodes. The VLT peer with
the lowest system MAC address assumes the primary role.
● If the heartbeat is up and the VLTi link goes down between the VLT peers, both the VLT peers retain
their primary and secondary roles. However, the VLT LAG on the secondary VLT peer shuts down.
NOTE: When you configure a priority for VLT peers using this command, the configuration is not
effective immediately. The primary priority configuration comes into effect the next time election is
triggered.
Example
OS10(conf-vlt-1)#primary-priority 2
Supported
Releases
10.4.1.0 or later
show spanning-tree virtual-interface
Displays STP , RPVST+, and MSTP information specific to VLT.
Syntax
show spanning-tree virtual-interface [detail]
Parameters detail—(Optional) Displays detailed output.
Default Not configured
Command Mode EXEC
Usage
Information
None
Example
OS10# show spanning-tree virtual-interface
VFP(VirtualFabricPort) of RSTP 1 is Designated Forwarding
Edge port: No (default)
Link type: point-to-point (auto)
Boundary: No, Bpdu-filter: Disable, Bpdu-Guard: Disable, Shutdown-on-Bpdu-Guard-violation: No
Root-Guard: Disable, Loop-Guard: Disable
Bpdus (MRecords) Sent: 11, Received: 7
Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
---------------------------------------------------------------------------------------------
VFP(VirtualFabricPort) 0.1 0 1 FWD 0 32768 0078.7614.6062 0.1
OS10# show spanning-tree virtual-interface
VFP(VirtualFabricPort) of vlan 100 is Designated Blocking
Virtual Link Trunking 1011