Reference Guide

Table Of Contents
Configuring a VLT Interconnect...............................................................................................1007
Enabling VLT and Creating a VLT Domain...............................................................................1007
Configuring a VLT Backup Link................................................................................................1008
Configuring a VLT Port Delay Period.......................................................................................1009
Reconfiguring the Default VLT Settings (Optional) ................................................................1009
Connecting a VLT Domain to an Attached Access Device (Switch or Server)....................... 1010
Configuring a VLT VLAN Peer-Down (Optional)...................................................................... 1011
Configuring Enhanced VLT (eVLT) (Optional).......................................................................... 1011
PVST+ Configuration...................................................................................................................... 1014
Sample PVST+ Configuration................................................................................................... 1014
VLT Sample Configuration..............................................................................................................1015
eVLT Configuration Example..........................................................................................................1019
eVLT Configuration Step Examples..........................................................................................1019
PIM-Sparse Mode Configuration Example.....................................................................................1021
Verifying a VLT Configuration........................................................................................................ 1022
Additional VLT Sample Configurations..........................................................................................1026
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).......................................................................................................................................1026
Troubleshooting VLT......................................................................................................................1028
Reconfiguring Stacked Switches as VLT........................................................................................1029
Specifying VLT Nodes in a PVLAN................................................................................................. 1030
Association of VLTi as a Member of a PVLAN.......................................................................... 1031
MAC Synchronization for VLT Nodes in a PVLAN....................................................................1031
PVLAN Operations When One VLT Peer is Down....................................................................1031
PVLAN Operations When a VLT Peer is Restarted...................................................................1032
Interoperation of VLT Nodes in a PVLAN with ARP Requests.................................................1032
Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN......1032
Configuring a VLT VLAN or LAG in a PVLAN................................................................................. 1034
Creating a VLT LAG or a VLT VLAN..........................................................................................1034
Associating the VLT LAG or VLT VLAN in a PVLAN..................................................................1035
Proxy ARP Capability on VLT Peer Nodes......................................................................................1036
Working of Proxy ARP for VLT Peer Nodes..............................................................................1037
VLT Nodes as Rendezvous Points for Multicast Resiliency...........................................................1038
Configuring VLAN-Stack over VLT.................................................................................................1038
IPv6 Peer Routing in VLT Domains Overview................................................................................1042
Working of IPv6 Peer Routing.................................................................................................. 1042
Synchronization of IPv6 ND Entries in a VLT Domain.............................................................1043
Synchronization of IPv6 ND Entries in a Non-VLT Domain....................................................1043
Tunneling of IPv6 ND in a VLT Domain................................................................................... 1043
Sample Configuration of IPv6 Peer Routing in a VLT Domain............................................... 1044