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Table Of Contents
VLT Terminology....................................................................................................................................................... 936
Layer-2 Traffic in VLT Domains.............................................................................................................................937
Interspersed VLANs..................................................................................................................................................938
VLT on Core Switches............................................................................................................................................. 938
Enhanced VLT............................................................................................................................................................939
Configure Virtual Link Trunking...................................................................................................................................940
Important Points to Remember............................................................................................................................. 940
Configuration Notes..................................................................................................................................................941
Primary and Secondary VLT Peers....................................................................................................................... 944
RSTP and VLT........................................................................................................................................................... 944
VLT Bandwidth Monitoring.....................................................................................................................................945
VLT and Stacking......................................................................................................................................................945
VLT and IGMP Snooping.........................................................................................................................................945
VLT IPv6......................................................................................................................................................................945
VLT Port Delayed Restoration............................................................................................................................... 946
PIM-Sparse Mode Support on VLT...................................................................................................................... 946
VLT Routing .............................................................................................................................................................. 948
Non-VLT ARP Sync...................................................................................................................................................951
RSTP Configuration........................................................................................................................................................ 951
Preventing Forwarding Loops in a VLT Domain................................................................................................. 951
Sample RSTP configuration....................................................................................................................................952
Configuring VLT........................................................................................................................................................ 952
PVST+ Configuration......................................................................................................................................................961
Peer Routing Configuration Example......................................................................................................................... 962
Dell-1 Switch Configuration.................................................................................................................................... 963
Dell-2 Switch Configuration................................................................................................................................... 966
R1 Configuration........................................................................................................................................................969
Access Switch A1 Configurations and Verification........................................................................................... 970
eVLT Configuration Example.........................................................................................................................................971
PIM-Sparse Mode Configuration Example................................................................................................................973
Verifying a VLT Configuration......................................................................................................................................974
Additional VLT Sample Configurations.......................................................................................................................977
Troubleshooting VLT...................................................................................................................................................... 978
Reconfiguring Stacked Switches as VLT..................................................................................................................980
Specifying VLT Nodes in a PVLAN.............................................................................................................................980
Configuring a VLT VLAN or LAG in a PVLAN.......................................................................................................... 983
Creating a VLT LAG or a VLT VLAN.................................................................................................................... 983
Associating the VLT LAG or VLT VLAN in a PVLAN........................................................................................984
Proxy ARP Capability on VLT Peer Nodes................................................................................................................985
VLT Nodes as Rendezvous Points for Multicast Resiliency................................................................................. 986
Configuring VLAN-Stack over VLT............................................................................................................................ 986
IPv6 Peer Routing in VLT Domains Overview..........................................................................................................989
Configure BFD in VLT Domain..................................................................................................................................... 994
Sample BFD configuration in VLT domain...........................................................................................................994
VXLAN on VLT.................................................................................................................................................................997
Chapter 60: VLT Proxy Gateway.............................................................................................. 1000
Proxy Gateway in VLT Domains................................................................................................................................ 1000
LLDP VLT Proxy Gateway in a Square VLT Topology....................................................................................1003
Configuring a Static VLT Proxy Gateway............................................................................................................... 1004
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