53 VLT Proxy Gateway........................................................................................938
Proxy Gateway in VLT Domains.......................................................................................................938
Guidelines for Enabling the VLT Proxy Gateway.......................................................................939
Enabling the VLT Proxy Gateway...............................................................................................940
LLDP Organizational TLV for Proxy Gateway............................................................................940
Sample Configuration for a VLT Proxy Gateway.......................................................................942
Configuring a Static VLT Proxy Gateway.........................................................................................943
Configuring an LLDP VLT Proxy Gateway.......................................................................................943
54 Virtual Link Trunking (VLT).......................................................................... 945
Overview...........................................................................................................................................945
VLT on Core Switches................................................................................................................946
Enhanced VLT.............................................................................................................................946
VLT Terminology...............................................................................................................................947
Configure Virtual Link Trunking.......................................................................................................948
Important Points to Remember.................................................................................................948
Configuration Notes...................................................................................................................949
Primary and Secondary VLT Peers.............................................................................................953
RSTP and VLT..............................................................................................................................953
VLT Bandwidth Monitoring.........................................................................................................953
VLT and IGMP Snooping.............................................................................................................954
VLT IPv6.......................................................................................................................................954
VLT Port Delayed Restoration....................................................................................................954
PIM-Sparse Mode Support on VLT.............................................................................................955
VLT Routing ................................................................................................................................956
Non-VLT ARP Sync.....................................................................................................................959
RSTP Configuration..........................................................................................................................959
Preventing Forwarding Loops in a VLT Domain........................................................................959
Sample RSTP Configuration.......................................................................................................960
Configuring VLT..........................................................................................................................960
PVST+ Configuration........................................................................................................................972
Sample PVST+ Configuration.....................................................................................................972
eVLT Configuration Example............................................................................................................973
eVLT Configuration Step Examples............................................................................................973
PIM-Sparse Mode Configuration Example.......................................................................................975
Verifying a VLT Configuration..........................................................................................................976
Additional VLT Sample Configurations............................................................................................980
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).........................................................................................................................................980
Troubleshooting VLT........................................................................................................................982
30