Connectivity Guide

Table Of Contents
Enhanced VLT............................................................................................................................................................938
Configure Virtual Link Trunking...................................................................................................................................939
Important Points to Remember............................................................................................................................. 939
Configuration Notes................................................................................................................................................. 940
Primary and Secondary VLT Peers....................................................................................................................... 943
RSTP and VLT........................................................................................................................................................... 943
VLT Bandwidth Monitoring.....................................................................................................................................944
VLT and Stacking...................................................................................................................................................... 944
VLT and IGMP Snooping......................................................................................................................................... 944
VLT IPv6......................................................................................................................................................................944
VLT Port Delayed Restoration............................................................................................................................... 945
PIM-Sparse Mode Support on VLT...................................................................................................................... 945
VLT Routing ...............................................................................................................................................................947
Non-VLT ARP Sync..................................................................................................................................................950
RSTP Configuration....................................................................................................................................................... 950
Preventing Forwarding Loops in a VLT Domain................................................................................................ 950
Sample RSTP configuration.................................................................................................................................... 951
Configuring VLT......................................................................................................................................................... 951
PVST+ Configuration.....................................................................................................................................................960
Peer Routing Configuration Example..........................................................................................................................961
Dell-1 Switch Configuration.................................................................................................................................... 962
Dell-2 Switch Configuration................................................................................................................................... 965
R1 Configuration........................................................................................................................................................968
Access Switch A1 Configurations and Verification........................................................................................... 969
eVLT Configuration Example........................................................................................................................................970
PIM-Sparse Mode Configuration Example................................................................................................................972
Verifying a VLT Configuration......................................................................................................................................973
Additional VLT Sample Configurations...................................................................................................................... 976
Troubleshooting VLT...................................................................................................................................................... 977
Reconfiguring Stacked Switches as VLT.................................................................................................................. 978
Specifying VLT Nodes in a PVLAN............................................................................................................................. 979
Configuring a VLT VLAN or LAG in a PVLAN.......................................................................................................... 982
Creating a VLT LAG or a VLT VLAN.................................................................................................................... 982
Associating the VLT LAG or VLT VLAN in a PVLAN........................................................................................983
Proxy ARP Capability on VLT Peer Nodes................................................................................................................983
VLT Nodes as Rendezvous Points for Multicast Resiliency.................................................................................985
Configuring VLAN-Stack over VLT............................................................................................................................ 985
IPv6 Peer Routing in VLT Domains Overview..........................................................................................................988
VXLAN on VLT................................................................................................................................................................ 992
Chapter 59: VLT Proxy Gateway................................................................................................ 995
Proxy Gateway in VLT Domains..................................................................................................................................995
LLDP VLT Proxy Gateway in a Square VLT Topology..................................................................................... 998
Configuring a Static VLT Proxy Gateway................................................................................................................. 999
Configuring an LLDP VLT Proxy Gateway................................................................................................................999
VLT Proxy Gateway Sample Topology.....................................................................................................................1000
VLT Domain Configuration....................................................................................................................................1000
Dell-1 VLT Configuration........................................................................................................................................1000
Dell-2 VLT Configuration........................................................................................................................................1001
Dell-3 VLT Configuration....................................................................................................................................... 1002
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Contents