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Conguring Route Leaking with Filtering.............................................................................................................1061
Conguring Route Leaking without Filtering Criteria.........................................................................................1062
63 Virtual Link Trunking (VLT).....................................................................................................................1065
Overview.......................................................................................................................................................................1065
VLT on Core Switches...........................................................................................................................................1068
VLT Terminology...........................................................................................................................................................1068
Important Points to Remember..................................................................................................................................1068
Conguration Notes.....................................................................................................................................................1069
Primary and Secondary VLT Peers.............................................................................................................................1072
RSTP and VLT...............................................................................................................................................................1072
VLT Bandwidth Monitoring......................................................................................................................................... 1072
VLT and High Availability..............................................................................................................................................1073
VLT and IGMP Snooping............................................................................................................................................. 1073
VLT and Stacking..........................................................................................................................................................1073
VLT IPv6........................................................................................................................................................................ 1073
VLT Port Delayed Restoration.....................................................................................................................................1073
PIM-Sparse Mode Support on VLT............................................................................................................................1074
VLT Routing ................................................................................................................................................................. 1075
Spanned VLANs..................................................................................................................................................... 1075
VLT Unicast Routing.............................................................................................................................................. 1075
VLT Multicast Routing........................................................................................................................................... 1076
Non-VLT ARP Sync...................................................................................................................................................... 1077
RSTP Conguration......................................................................................................................................................1077
Preventing Forwarding Loops in a VLT Domain..................................................................................................1078
Sample RSTP Conguration................................................................................................................................. 1078
Conguring VLT............................................................................................................................................................1079
Conguring a VLT Interconnect............................................................................................................................1079
Enabling VLT and Creating a VLT Domain...........................................................................................................1080
Conguring a VLT Backup Link............................................................................................................................. 1081
Conguring a VLT Port Delay Period....................................................................................................................1081
Reconguring the Default VLT Settings (Optional) ..........................................................................................1082
Connecting a VLT Domain to an Attached Access Device (Switch or Server)..............................................1082
Conguring a VLT VLAN Peer-Down (Optional)................................................................................................1083
Conguring Enhanced VLT (eVLT) (Optional)....................................................................................................1084
VLT Sample Conguration.................................................................................................................................... 1086
eVLT Conguration Example...................................................................................................................................... 1089
eVLT Conguration Step Examples..................................................................................................................... 1089
PIM-Sparse Mode Conguration Example................................................................................................................ 1091
Verifying a VLT Conguration..................................................................................................................................... 1092
Additional VLT Sample Congurations...................................................................................................................... 1095
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)......................................... 1095
Troubleshooting VLT.....................................................................................................................................................1097
Reconguring Stacked Switches as VLT.................................................................................................................. 1098
Specifying VLT Nodes in a PVLAN............................................................................................................................ 1098
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