Deployment Guide

Table Of Contents
Layer-2 Traffic in VLT Domains.............................................................................................................................948
Interspersed VLANs..................................................................................................................................................949
VLT on Core Switches............................................................................................................................................. 949
Enhanced VLT........................................................................................................................................................... 950
Configure Virtual Link Trunking....................................................................................................................................951
Important Points to Remember..............................................................................................................................951
Configuration Notes................................................................................................................................................. 952
Primary and Secondary VLT Peers.......................................................................................................................955
RSTP and VLT........................................................................................................................................................... 955
VLT Bandwidth Monitoring.....................................................................................................................................956
VLT and Stacking......................................................................................................................................................956
VLT and IGMP Snooping.........................................................................................................................................956
VLT IPv6..................................................................................................................................................................... 956
VLT Port Delayed Restoration............................................................................................................................... 957
PIM-Sparse Mode Support on VLT...................................................................................................................... 957
VLT Routing .............................................................................................................................................................. 959
Non-VLT ARP Sync.................................................................................................................................................. 962
RSTP Configuration....................................................................................................................................................... 962
Preventing Forwarding Loops in a VLT Domain................................................................................................ 962
Sample RSTP configuration....................................................................................................................................963
Configuring VLT........................................................................................................................................................ 963
PVST+ Configuration..................................................................................................................................................... 972
Peer Routing Configuration Example......................................................................................................................... 973
Dell-1 Switch Configuration.................................................................................................................................... 974
Dell-2 Switch Configuration....................................................................................................................................977
R1 Configuration........................................................................................................................................................980
Access Switch A1 Configurations and Verification............................................................................................ 981
eVLT Configuration Example........................................................................................................................................982
PIM-Sparse Mode Configuration Example................................................................................................................984
Verifying a VLT Configuration..................................................................................................................................... 985
Additional VLT Sample Configurations...................................................................................................................... 988
Troubleshooting VLT......................................................................................................................................................989
Reconfiguring Stacked Switches as VLT..................................................................................................................990
Specifying VLT Nodes in a PVLAN..............................................................................................................................991
Configuring a VLT VLAN or LAG in a PVLAN.......................................................................................................... 994
Creating a VLT LAG or a VLT VLAN.................................................................................................................... 994
Associating the VLT LAG or VLT VLAN in a PVLAN........................................................................................995
Proxy ARP Capability on VLT Peer Nodes............................................................................................................... 995
VLT Nodes as Rendezvous Points for Multicast Resiliency................................................................................. 997
Configuring VLAN-Stack over VLT.............................................................................................................................997
IPv6 Peer Routing in VLT Domains Overview........................................................................................................1000
Configure BFD in VLT Domain................................................................................................................................... 1004
Sample BFD configuration in VLT domain.........................................................................................................1004
VXLAN on VLT...............................................................................................................................................................1008
Chapter 59: VLT Proxy Gateway................................................................................................1011
Proxy Gateway in VLT Domains.................................................................................................................................. 1011
LLDP VLT Proxy Gateway in a Square VLT Topology.................................................................................... 1014
Configuring a Static VLT Proxy Gateway................................................................................................................ 1015
Configuring an LLDP VLT Proxy Gateway...............................................................................................................1015
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