Setup Guide
Layer-2 Trac in VLT Domains............................................................................................................................. 1078
Interspersed VLANs............................................................................................................................................... 1079
VLT on Core Switches........................................................................................................................................... 1079
Enhanced VLT........................................................................................................................................................ 1080
Congure Virtual Link Trunking................................................................................................................................... 1081
Important Points to Remember.............................................................................................................................1081
Conguration Notes...............................................................................................................................................1082
Primary and Secondary VLT Peers...................................................................................................................... 1085
RSTP and VLT........................................................................................................................................................ 1086
VLT Bandwidth Monitoring................................................................................................................................... 1086
VLT and Stacking................................................................................................................................................... 1086
VLT and IGMP Snooping.......................................................................................................................................1086
VLT IPv6.................................................................................................................................................................. 1087
VLT Port Delayed Restoration...............................................................................................................................1087
PIM-Sparse Mode Support on VLT......................................................................................................................1087
VLT Routing ........................................................................................................................................................... 1089
Non-VLT ARP Sync................................................................................................................................................1092
RSTP Conguration.....................................................................................................................................................1093
Preventing Forwarding Loops in a VLT Domain..................................................................................................1093
Sample RSTP conguration..................................................................................................................................1093
Conguring VLT......................................................................................................................................................1094
PVST+ Conguration....................................................................................................................................................1104
Sample PVST+ Conguration................................................................................................................................1105
Peer Routing Conguration Example......................................................................................................................... 1105
Dell-1 Switch Conguration....................................................................................................................................1106
Dell-2 Switch Conguration....................................................................................................................................1110
R1 Conguration.......................................................................................................................................................1113
Access Switch A1 Congurations and Verication...............................................................................................1114
eVLT Conguration Example........................................................................................................................................ 1115
eVLT Conguration Step Examples.......................................................................................................................1115
PIM-Sparse Mode Conguration Example................................................................................................................. 1117
Verifying a VLT Conguration.......................................................................................................................................1118
Additional VLT Sample Congurations........................................................................................................................ 1121
Troubleshooting VLT..................................................................................................................................................... 1123
Reconguring Stacked Switches as VLT....................................................................................................................1124
Specifying VLT Nodes in a PVLAN............................................................................................................................. 1124
Association of VLTi as a Member of a PVLAN....................................................................................................1125
MAC Synchronization for VLT Nodes in a PVLAN............................................................................................. 1125
PVLAN Operations When One VLT Peer is Down..............................................................................................1126
PVLAN Operations When a VLT Peer is Restarted............................................................................................ 1126
Interoperation of VLT Nodes in a PVLAN with ARP Requests..........................................................................1126
Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN............................1126
Conguring a VLT VLAN or LAG in a PVLAN............................................................................................................1128
Creating a VLT LAG or a VLT VLAN..................................................................................................................... 1128
Associating the VLT LAG or VLT VLAN in a PVLAN.......................................................................................... 1129
Contents
33