Dell S4048–ON Configuration Manual page 31

61 Virtual Link Trunking (VLT)....................................................................................................................... 976
Overview.........................................................................................................................................................................976
VLT Terminology.......................................................................................................................................................979
Layer-2 Traffic in VLT Domains.............................................................................................................................. 980
Interspersed VLANs................................................................................................................................................. 981
VLT on Core Switches............................................................................................................................................. 981
Enhanced VLT.......................................................................................................................................................... 982
Configure Virtual Link Trunking.................................................................................................................................... 983
Important Points to Remember............................................................................................................................. 983
Configuration Notes................................................................................................................................................ 984
Primary and Secondary VLT Peers........................................................................................................................ 987
RSTP and VLT.......................................................................................................................................................... 987
VLT Bandwidth Monitoring.....................................................................................................................................988
VLT and Stacking.....................................................................................................................................................988
VLT and IGMP Snooping........................................................................................................................................ 988
VLT IPv6................................................................................................................................................................... 988
VLT Port Delayed Restoration................................................................................................................................989
PIM-Sparse Mode Support on VLT.......................................................................................................................989
VLT Routing ............................................................................................................................................................. 991
Non-VLT ARP Sync................................................................................................................................................. 994
RSTP Configuration...................................................................................................................................................... 995
Preventing Forwarding Loops in a VLT Domain................................................................................................... 995
Sample RSTP Configuration...................................................................................................................................995
Configuring VLT....................................................................................................................................................... 996
PVST+ Configuration...................................................................................................................................................1006
Sample PVST+ Configuration............................................................................................................................... 1006
Peer Routing Configuration Example.........................................................................................................................1007
Dell-1 Switch Configuration................................................................................................................................... 1008
Dell-2 Switch Configuration................................................................................................................................... 1012
R1 Configuration......................................................................................................................................................1015
Access Switch A1 Configurations and Verification..............................................................................................1016
eVLT Configuration Example....................................................................................................................................... 1017
eVLT Configuration Step Examples...................................................................................................................... 1017
PIM-Sparse Mode Configuration Example................................................................................................................ 1019
Verifying a VLT Configuration..................................................................................................................................... 1020
Additional VLT Sample Configurations.......................................................................................................................1023
Troubleshooting VLT.................................................................................................................................................... 1025
Reconfiguring Stacked Switches as VLT...................................................................................................................1026
Specifying VLT Nodes in a PVLAN............................................................................................................................ 1026
Association of VLTi as a Member of a PVLAN................................................................................................... 1027
MAC Synchronization for VLT Nodes in a PVLAN............................................................................................. 1027
PVLAN Operations When One VLT Peer is Down............................................................................................. 1028
PVLAN Operations When a VLT Peer is Restarted........................................................................................... 1028
Interoperation of VLT Nodes in a PVLAN with ARP Requests.........................................................................1028
Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN...........................1028
Contents 31