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Non-VLT ARP Sync
In the Dell Networking OS version 9.2(0.0), ARP entries (including ND entries) learned on other ports are synced with the VLT
peer to support station move scenarios.
Prior to Dell Networking OS version 9.2.(0.0), only ARP entries learned on VLT ports were synced between peers.
Additionally, ARP entries resulting from station movements from VLT to non-VLT ports or to different non-VLT ports are
learned on the non-VLT port and synced with the peer node. The peer node is updated to use the new non-VLT port.
NOTE: ARP entries learned on non-VLT, non-spanned VLANs are not synced with VLT peers.
Verifying a VLT Configuration
To monitor the operation or verify the configuration of a VLT domain, use any of the following show commands on the primary
and secondary VLT switches.
● Display information on backup link operation.
EXEC mode
show vlt backup-link
● Display general status information about VLT domains currently configured on the switch.
EXEC mode
show vlt brief
● Display detailed information about the VLT-domain configuration, including local and peer port-channel IDs, local VLT switch
status, and number of active VLANs on each port channel.
EXEC mode
show vlt detail
● Display the VLT peer status, role of the local VLT switch, VLT system MAC address and system priority, and the MAC
address and priority of the locally-attached VLT device.
EXEC mode
show vlt role
● Display the current configuration of all VLT domains or a specified group on the switch.
EXEC mode
show running-config vlt
● Display statistics on VLT operation.
EXEC mode
show vlt statistics
● Display the current status of a port or port-channel interface used in the VLT domain.
EXEC mode
show interfaces interface
○ interface: specify one of the following interface types:
￭ 10-Gigabit Ethernet: enter tengigabitethernet slot/port.
￭ Port channel: enter port-channel {1-128}.
Example of the show vlt backup-link Command
Dell_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
Dell_VLTpeer2# show vlt backup-link
PMUX Mode of the IO Aggregator
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