Users Guide
VLT Terminology.............................................................................................................................................................883
Congure Virtual Link Trunking.......................................................................................................................................883
Important Points to Remember................................................................................................................................883
Conguration Notes.................................................................................................................................................885
Primary and Secondary VLT Peers........................................................................................................................... 887
RSTP and VLT..........................................................................................................................................................888
VLT Bandwidth Monitoring.......................................................................................................................................888
VLT and Stacking..................................................................................................................................................... 888
VLT and IGMP Snooping..........................................................................................................................................888
VLT IPv6.................................................................................................................................................................. 889
VLT Port Delayed Restoration.................................................................................................................................. 889
PIM-Sparse Mode Support on VLT.......................................................................................................................... 889
VLT Routing .............................................................................................................................................................891
Non-VLT ARP Sync..................................................................................................................................................893
RSTP Conguration....................................................................................................................................................... 893
Preventing Forwarding Loops in a VLT Domain........................................................................................................ 893
Sample RSTP Conguration.....................................................................................................................................893
Conguring VLT....................................................................................................................................................... 894
PVST+ Conguration..................................................................................................................................................... 904
Sample PVST+ Conguration...................................................................................................................................904
eVLT Conguration Example..........................................................................................................................................905
eVLT Conguration Step Examples..........................................................................................................................905
PIM-Sparse Mode Conguration Example......................................................................................................................907
Verifying a VLT Conguration.........................................................................................................................................908
Additional VLT Sample Congurations............................................................................................................................. 911
Conguring Virtual Link Trunking (VLT Peer 1)Conguring Virtual Link Trunking (VLT Peer 2)Verifying a Port-
Channel Connection to a VLT Domain (From an Attached Access Switch)................................................................911
Troubleshooting VLT....................................................................................................................................................... 913
Reconguring Stacked Switches as VLT......................................................................................................................... 914
Specifying VLT Nodes in a PVLAN..................................................................................................................................914
Association of VLTi as a Member of a PVLAN.......................................................................................................... 915
MAC Synchronization for VLT Nodes in a PVLAN.....................................................................................................915
PVLAN Operations When One VLT Peer is Down.....................................................................................................916
PVLAN Operations When a VLT Peer is Restarted................................................................................................... 916
Interoperation of VLT Nodes in a PVLAN with ARP Requests...................................................................................916
Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN......................................... 916
Conguring a VLT VLAN or LAG in a PVLAN..................................................................................................................918
Creating a VLT LAG or a VLT VLAN..........................................................................................................................918
Associating the VLT LAG or VLT VLAN in a PVLAN..................................................................................................919
Proxy ARP Capability on VLT Peer Nodes......................................................................................................................920
Working of Proxy ARP for VLT Peer Nodes..............................................................................................................920
VLT Nodes as Rendezvous Points for Multicast Resiliency............................................................................................. 921
Conguring VLAN-Stack over VLT.................................................................................................................................922
IPv6 Peer Routing in VLT Domains Overview.................................................................................................................925
Working of IPv6 Peer Routing..................................................................................................................................925
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