Administrator Guide

Table Of Contents
Configuring Route Leaking with Filtering...........................................................................................................1010
Configuring Route Leaking without Filtering Criteria.......................................................................................1011
Chapter 64: Virtual Link Trunking (VLT)................................................................................... 1013
Overview.......................................................................................................................................................................... 1014
VLT on Core Switches............................................................................................................................................ 1016
VLT Terminology............................................................................................................................................................ 1016
Important Points to Remember.................................................................................................................................. 1016
Configuration Notes...................................................................................................................................................... 1017
Primary and Secondary VLT Peers........................................................................................................................... 1020
RSTP and VLT................................................................................................................................................................1020
VLT Bandwidth Monitoring.........................................................................................................................................1020
VLT and High Availability..............................................................................................................................................1021
VLT and IGMP Snooping.............................................................................................................................................. 1021
VLT and Stacking...........................................................................................................................................................1021
VLT IPv6...........................................................................................................................................................................1021
VLT Port Delayed Restoration.................................................................................................................................... 1021
PIM-Sparse Mode Support on VLT...........................................................................................................................1022
VLT Routing ...................................................................................................................................................................1023
VLT Unicast Routing...............................................................................................................................................1023
VLT Multicast Routing........................................................................................................................................... 1024
Non-VLT ARP Sync...................................................................................................................................................... 1025
RSTP Configuration......................................................................................................................................................1025
Preventing Forwarding Loops in a VLT Domain...............................................................................................1025
Sample RSTP Configuration................................................................................................................................. 1026
Configuring VLT.............................................................................................................................................................1026
Configuring a VLT Interconnect.......................................................................................................................... 1026
Enabling VLT and Creating a VLT Domain.........................................................................................................1027
Configuring a VLT Backup Link............................................................................................................................1028
Configuring a VLT Port Delay Period..................................................................................................................1028
Reconfiguring the Default VLT Settings (Optional) ...................................................................................... 1028
Connecting a VLT Domain to an Attached Access Device (Switch or Server)....................................... 1029
Configuring a VLT VLAN Peer-Down (Optional).............................................................................................1030
Configuring Enhanced VLT (eVLT) (Optional)................................................................................................ 1030
VLT Sample Configuration.................................................................................................................................... 1032
eVLT Configuration Example......................................................................................................................................1035
PIM-Sparse Mode Configuration Example.............................................................................................................. 1037
Verifying a VLT Configuration.................................................................................................................................... 1037
Additional VLT Sample Configurations......................................................................................................................1041
Troubleshooting VLT.................................................................................................................................................... 1042
Reconfiguring Stacked Switches as VLT................................................................................................................ 1044
Specifying VLT Nodes in a PVLAN........................................................................................................................... 1044
Configuring a VLT VLAN or LAG in a PVLAN.........................................................................................................1047
Creating a VLT LAG or a VLT VLAN...................................................................................................................1047
Associating the VLT LAG or VLT VLAN in a PVLAN...................................................................................... 1048
Proxy ARP Capability on VLT Peer Nodes.............................................................................................................. 1049
VLT Nodes as Rendezvous Points for Multicast Resiliency............................................................................... 1050
Configuring VLAN-Stack over VLT...........................................................................................................................1050
Configure BFD in VLT Domain................................................................................................................................... 1053
Sample BFD configuration in VLT domain.........................................................................................................1053
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