Reference Guide

VLT on Core Switches.................................................................................................................874
Enhanced VLT............................................................................................................................. 874
VLT Terminology...............................................................................................................................875
Configure Virtual Link Trunking....................................................................................................... 876
Important Points to Remember................................................................................................. 876
Configuration Notes....................................................................................................................877
Primary and Secondary VLT Peers..............................................................................................881
RSTP and VLT.............................................................................................................................. 881
VLT Bandwidth Monitoring......................................................................................................... 881
VLT and IGMP Snooping.............................................................................................................882
VLT IPv6.......................................................................................................................................882
VLT Port Delayed Restoration.................................................................................................... 882
PIM-Sparse Mode Support on VLT.............................................................................................883
VLT Routing ................................................................................................................................884
Non-VLT ARP Sync..................................................................................................................... 887
RSTP Configuration.......................................................................................................................... 887
Preventing Forwarding Loops in a VLT Domain........................................................................ 887
Sample RSTP Configuration.......................................................................................................888
Configuring VLT..........................................................................................................................888
eVLT Configuration Example...........................................................................................................900
eVLT Configuration Step Examples............................................................................................901
PIM-Sparse Mode Configuration Example...................................................................................... 903
Verifying a VLT Configuration..........................................................................................................904
Additional VLT Sample Configurations............................................................................................908
Configuring Virtual Link Trunking (VLT Peer 1)Configuring Virtual Link Trunking (VLT Peer
2)Verifying a Port-Channel Connection to a VLT Domain (From an Attached Access
Switch).........................................................................................................................................908
Troubleshooting VLT........................................................................................................................ 910
Reconfiguring Stacked Switches as VLT...........................................................................................911
Specifying VLT Nodes in a PVLAN.................................................................................................... 912
Association of VLTi as a Member of a PVLAN............................................................................ 913
MAC Synchronization for VLT Nodes in a PVLAN......................................................................913
PVLAN Operations When One VLT Peer is Down......................................................................913
PVLAN Operations When a VLT Peer is Restarted..................................................................... 914
Interoperation of VLT Nodes in a PVLAN with ARP Requests................................................... 914
Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN........914
Configuring a VLT VLAN or LAG in a PVLAN....................................................................................916
Creating a VLT LAG or a VLT VLAN............................................................................................ 916
Associating the VLT LAG or VLT VLAN in a PVLAN.................................................................... 917
Proxy ARP Capability on VLT Peer Nodes........................................................................................918
Working of Proxy ARP for VLT Peer Nodes................................................................................919
VLT Nodes as Rendezvous Points for Multicast Resiliency.............................................................920