Version 8.3.8.0 Introduced on the S4810.
Usage 
Information
Use the peer-down-vlan parameter to configure the VLAN from where the VLT peer forwards 
packets received over the VLTi from an adjacent VLT peer that is down. When a VLT peer with 
bare metal provisioning (BMP) is booting up, it sends untagged DHCP discover packets to its 
peer over the VLTi. Use this configuration to ensure that the DHCP discover packets are 
forwarded to the VLAN that has the DHCP server.
show vlt backup-link
Displays information on the backup link operation.
Z-Series, S4810
Syntax
show vlt backup-link
Default Not configured.
Command Modes EXEC
Command History
Version 9.0.0.0 Introduced on the Z9000.
Version 8.3.8.0 Introduced on the S4810.
Example
FTOS_VLTpeer1# show vlt backup-link
VLT Backup Link
-----------------
Destination:                 10.11.200.18
Peer HeartBeat status:       Up
HeartBeat Timer Interval:    1
HeartBeat Timeout:           3
UDP Port:                    34998
HeartBeat Messages Sent:     1026
HeartBeat Messages Received: 1025
show vlt brief
Displays summarized status information about VLT domains currently configured on the switch.
Z-Series, S4810
Syntax
show vlt brief 
Default Not configured.
Command Modes EXEC
1461