Administrator Guide

Dynamic Route Leaking.....................................................................................................................................................961
Configuring Route Leaking with Filtering................................................................................................................. 962
Configuring Route Leaking without Filtering Criteria..............................................................................................963
64 Virtual Link Trunking (VLT)..................................................................................................... 965
Overview............................................................................................................................................................................965
VLT on Core Switches................................................................................................................................................967
VLT Terminology............................................................................................................................................................... 967
Important Points to Remember.......................................................................................................................................967
Configuration Notes..........................................................................................................................................................968
Primary and Secondary VLT Peers................................................................................................................................. 970
RSTP and VLT....................................................................................................................................................................971
VLT Bandwidth Monitoring...............................................................................................................................................971
VLT and High Availability...................................................................................................................................................971
VLT and IGMP Snooping...................................................................................................................................................971
VLT and Stacking.............................................................................................................................................................. 972
VLT IPv6.............................................................................................................................................................................972
VLT Port Delayed Restoration.........................................................................................................................................972
PIM-Sparse Mode Support on VLT................................................................................................................................ 972
VLT Routing ...................................................................................................................................................................... 974
VLT Unicast Routing................................................................................................................................................... 974
VLT Multicast Routing................................................................................................................................................975
Non-VLT ARP Sync.......................................................................................................................................................... 976
RSTP Configuration.......................................................................................................................................................... 976
Preventing Forwarding Loops in a VLT Domain...................................................................................................... 976
Sample RSTP Configuration...................................................................................................................................... 976
Configuring VLT.................................................................................................................................................................977
Configuring a VLT Interconnect................................................................................................................................ 977
Enabling VLT and Creating a VLT Domain............................................................................................................... 978
Configuring a VLT Backup Link................................................................................................................................. 978
Configuring a VLT Port Delay Period........................................................................................................................979
Reconfiguring the Default VLT Settings (Optional) ...............................................................................................979
Connecting a VLT Domain to an Attached Access Device (Switch or Server)..................................................980
Configuring a VLT VLAN Peer-Down (Optional).................................................................................................... 980
Configuring Enhanced VLT (eVLT) (Optional)........................................................................................................ 981
VLT Sample Configuration......................................................................................................................................... 982
eVLT Configuration Example...........................................................................................................................................985
PIM-Sparse Mode Configuration Example.....................................................................................................................987
Verifying a VLT Configuration......................................................................................................................................... 988
Additional VLT Sample Configurations............................................................................................................................991
Troubleshooting VLT........................................................................................................................................................ 993
Reconfiguring Stacked Switches as VLT.......................................................................................................................994
Specifying VLT Nodes in a PVLAN................................................................................................................................. 994
Configuring a VLT VLAN or LAG in a PVLAN................................................................................................................997
Creating a VLT LAG or a VLT VLAN.........................................................................................................................997
Associating the VLT LAG or VLT VLAN in a PVLAN..............................................................................................998
Proxy ARP Capability on VLT Peer Nodes.....................................................................................................................998
VLT Nodes as Rendezvous Points for Multicast Resiliency........................................................................................ 999
Configuring VLAN-Stack over VLT...............................................................................................................................1000
Configure BFD in VLT Domain.......................................................................................................................................1002
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