Setup Guide

Table Of Contents
VLT Terminology....................................................................................................................................................... 937
Layer-2 Traffic in VLT Domains.............................................................................................................................938
Interspersed VLANs..................................................................................................................................................939
VLT on Core Switches............................................................................................................................................. 939
Enhanced VLT............................................................................................................................................................940
Configure Virtual Link Trunking....................................................................................................................................941
Important Points to Remember.............................................................................................................................. 941
Configuration Notes................................................................................................................................................. 942
Primary and Secondary VLT Peers.......................................................................................................................945
RSTP and VLT........................................................................................................................................................... 945
VLT Bandwidth Monitoring.....................................................................................................................................946
VLT and Stacking......................................................................................................................................................946
VLT and IGMP Snooping......................................................................................................................................... 946
VLT IPv6......................................................................................................................................................................946
VLT Port Delayed Restoration............................................................................................................................... 947
PIM-Sparse Mode Support on VLT...................................................................................................................... 947
VLT Routing .............................................................................................................................................................. 949
Non-VLT ARP Sync.................................................................................................................................................. 952
RSTP Configuration....................................................................................................................................................... 952
Preventing Forwarding Loops in a VLT Domain................................................................................................ 952
Sample RSTP configuration....................................................................................................................................953
Configuring VLT........................................................................................................................................................ 953
PVST+ Configuration.....................................................................................................................................................962
Peer Routing Configuration Example......................................................................................................................... 963
Dell-1 Switch Configuration.................................................................................................................................... 964
Dell-2 Switch Configuration................................................................................................................................... 967
R1 Configuration........................................................................................................................................................ 970
Access Switch A1 Configurations and Verification............................................................................................ 971
eVLT Configuration Example........................................................................................................................................972
PIM-Sparse Mode Configuration Example................................................................................................................974
Verifying a VLT Configuration......................................................................................................................................975
Additional VLT Sample Configurations.......................................................................................................................978
Troubleshooting VLT......................................................................................................................................................979
Reconfiguring Stacked Switches as VLT...................................................................................................................981
Specifying VLT Nodes in a PVLAN..............................................................................................................................981
Configuring a VLT VLAN or LAG in a PVLAN.......................................................................................................... 984
Creating a VLT LAG or a VLT VLAN.................................................................................................................... 984
Associating the VLT LAG or VLT VLAN in a PVLAN........................................................................................985
Proxy ARP Capability on VLT Peer Nodes................................................................................................................986
VLT Nodes as Rendezvous Points for Multicast Resiliency................................................................................. 987
Configuring VLAN-Stack over VLT.............................................................................................................................987
IPv6 Peer Routing in VLT Domains Overview......................................................................................................... 990
Configure BFD in VLT Domain.....................................................................................................................................995
Sample BFD configuration in VLT domain.......................................................................................................... 995
VXLAN on VLT................................................................................................................................................................ 998
Chapter 60: VLT Proxy Gateway............................................................................................... 1001
Proxy Gateway in VLT Domains................................................................................................................................. 1001
LLDP VLT Proxy Gateway in a Square VLT Topology....................................................................................1004
Configuring a Static VLT Proxy Gateway............................................................................................................... 1005
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Contents