Connectivity Guide

Default 32768.
Command Mode VLT-DOMAIN
Usage Information
• After you congure 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 congure 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 congured 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 congure a priority for VLT peers using this command, the conguration is not
eective immediately. The primary priority conguration comes into eect 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 specic to VLT.
Syntax
show spanning-tree virtual-interface [detail]
Parameters detail—(Optional) Displays detailed output.
Default Not congured
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
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: 7, Received: 9
Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
---------------------------------------------------------------------------------------------
VFP(VirtualFabricPort) 0.1 0 1 BLK 0 4196 90b1.1cf4.a602 0.1
Example (detail)
OS10# show spanning-tree virtual-interface detail
Port 1 (VFP(VirtualFabricPort)) of RSTP 1 is designated Forwarding
Port path cost 1, Port priority 0, Port Identifier 0.1
Virtual Link Trunking 1061