Administrator Guide

Conguring an LLDP VLT Proxy Gateway.................................................................................................................. 979
Conguring a Static VLT Proxy Gateway....................................................................................................................979
65 Virtual Link Trunking (VLT)...................................................................................................................... 980
Overview........................................................................................................................................................................ 980
VLT on Core Switches............................................................................................................................................. 981
Multiple VLT..............................................................................................................................................................982
VLT Terminology............................................................................................................................................................ 983
Congure Virtual Link Trunking.................................................................................................................................... 983
Important Points to Remember............................................................................................................................. 983
Conguration Notes................................................................................................................................................ 984
RSTP and VLT.......................................................................................................................................................... 987
VLT Bandwidth Monitoring.....................................................................................................................................987
VLT and Stacking..................................................................................................................................................... 987
VLT and IGMP Snooping.........................................................................................................................................987
VLT Port Delayed Restoration................................................................................................................................988
PIM-Sparse Mode Support on VLT.......................................................................................................................988
RSTP Conguration...................................................................................................................................................... 990
Preventing Forwarding Loops in a VLT Domain................................................................................................... 990
Sample RSTP Conguration...................................................................................................................................990
Conguring VLT........................................................................................................................................................991
Conguring a VLT Interconnect..............................................................................................................................991
Enabling VLT and Creating a VLT Domain............................................................................................................ 992
Conguring a VLT Backup Link..............................................................................................................................993
Conguring a VLT Port Delay Period.....................................................................................................................993
Reconguring the Default VLT Settings (Optional) ........................................................................................... 993
Connecting a VLT Domain to an Attached Access Device (Switch or Server)............................................... 994
Conguring a VLT VLAN Peer-Down (Optional).................................................................................................995
Conguring Enhanced VLT (Optional)..................................................................................................................996
PVST+ Conguration.................................................................................................................................................... 998
Sample PVST+ Conguration.................................................................................................................................998
VLT Sample Conguration............................................................................................................................................999
eVLT Conguration Example...................................................................................................................................... 1002
eVLT Conguration Step Examples..................................................................................................................... 1002
PIM-Sparse Mode Conguration Example............................................................................................................... 1004
Verifying a VLT Conguration.....................................................................................................................................1005
Additional VLT Sample Congurations...................................................................................................................... 1008
Conguring Virtual Link Trunking (VLT Peer 1)Conguring Virtual Link Trunking (VLT Peer 2)Verifying a
Port-Channel Connection to a VLT Domain (From an Attached Access Switch)......................................... 1008
Troubleshooting VLT.....................................................................................................................................................1010
Reconguring Stacked Switches as VLT.................................................................................................................... 1011
Specifying VLT Nodes in a PVLAN..............................................................................................................................1011
Association of VLTi as a Member of a PVLAN....................................................................................................1012
MAC Synchronization for VLT Nodes in a PVLAN............................................................................................. 1012
PVLAN Operations When One VLT Peer is Down..............................................................................................1013
PVLAN Operations When a VLT Peer is Restarted............................................................................................ 1013
32
Contents