Users Guide

INTERFACE PORT-CHANNEL mode
vlt-peer-lag port-channel id-number
Valid port-channel ID numbers are from 1 to 128.
11. Ensure that the port channel is active.
INTERFACE PORT-CHANNEL mode
no shutdown
12. Add links to the eVLT port. Congure a range of interfaces to bulk congure.
CONFIGURATION mode
interface range {port-channel id}
13. Enable LACP on the LAN port.
INTERFACE mode
port-channel-protocol lacp
14. Congure the LACP port channel mode.
INTERFACE mode
port-channel number mode [active]
15. Ensure that the interface is active.
MANAGEMENT INTERFACE mode
no shutdown
16. Repeat steps 1 through 15 for the VLT peer node in Domain 1.
17. Repeat steps 1 through 15 for the rst VLT node in Domain 2.
18. Repeat steps 1 through 15 for the VLT peer node in Domain 2.
To verify the conguration of a VLT domain, use any of the show commands described in Verifying a VLT Conguration.
PVST+ Conguration
PVST+ is supported in a VLT domain.
Before you congure VLT on peer switches, congure PVST+ in the network. PVST+ is required for initial loop prevention during the
VLT startup phase. You may also use PVST+ for loop prevention in the network outside of the VLT port channel. For information on
PVST+, refer to Per-VLAN Spanning Tree Plus (PVST+).
Run PVST+ on both VLT peer switches. PVST+ instance will be created for every VLAN congured in the system. PVST+ instances
running in the Primary Peer will control the VLT-LAGs on both Primary and Secondary peers. Only the Primary VLT switch
determines the PVST+ roles and states on VLT ports and ensures that the VLT interconnect link is never blocked. PVST+ instance in
Primary peer will send the role/state of VLT-LAGs for all VLANs to the Secondary peer. Secondary peer will use this information to
program the hardware. PVST+ instance running in Secondary peer will not control the VLT-LAGs.
Dell Networking recommends conguring the primary VLT peer as the primary root device for all the congured PVST+ Instances
and conguring the secondary VLT peer as the secondary root device for all the congured PVST+ Instances.
Sample PVST+ Conguration
The following examples show the PVST+ conguration that you must perform on each peer switch to prevent forwarding loops.
Congure PVST+ on VLT Peers to Prevent Forwarding Loops (VLT Peer 1)
Dell_VLTpeer1(conf)#protocol spanning-tree pvst
Dell_VLTpeer1(conf-pvst)#no disable
Dell_VLTpeer1(conf-pvst)#vlan 1000 bridge-priority 0
932
Virtual Link Trunking (VLT)