Install Guide

Table Of Contents
Interspersed VLANs................................................................................................................................................. 905
VLT on Core Switches.............................................................................................................................................905
Enhanced VLT............................................................................................................................................................906
Configure Virtual Link Trunking................................................................................................................................... 907
Important Points to Remember............................................................................................................................. 907
Configuration Notes................................................................................................................................................. 908
Primary and Secondary VLT Peers.........................................................................................................................911
RSTP and VLT............................................................................................................................................................. 911
VLT Bandwidth Monitoring......................................................................................................................................912
VLT and Stacking.......................................................................................................................................................912
VLT and IGMP Snooping..........................................................................................................................................912
VLT IPv6...................................................................................................................................................................... 912
VLT Port Delayed Restoration................................................................................................................................913
PIM-Sparse Mode Support on VLT....................................................................................................................... 913
VLT Routing ............................................................................................................................................................... 915
Non-VLT ARP Sync...................................................................................................................................................918
RSTP Configuration........................................................................................................................................................ 918
Preventing Forwarding Loops in a VLT Domain................................................................................................. 918
Sample RSTP configuration.................................................................................................................................... 919
Configuring VLT......................................................................................................................................................... 919
PVST+ Configuration..................................................................................................................................................... 928
Peer Routing Configuration Example......................................................................................................................... 929
Dell-1 Switch Configuration.................................................................................................................................... 929
Dell-2 Switch Configuration................................................................................................................................... 933
R1 Configuration........................................................................................................................................................936
Access Switch A1 Configurations and Verification........................................................................................... 937
eVLT Configuration Example........................................................................................................................................938
PIM-Sparse Mode Configuration Example............................................................................................................... 940
Verifying a VLT Configuration..................................................................................................................................... 940
Additional VLT Sample Configurations...................................................................................................................... 944
Troubleshooting VLT......................................................................................................................................................945
Reconfiguring Stacked Switches as VLT.................................................................................................................. 946
Specifying VLT Nodes in a PVLAN............................................................................................................................. 947
Configuring a VLT VLAN or LAG in a PVLAN.......................................................................................................... 950
Creating a VLT LAG or a VLT VLAN.................................................................................................................... 950
Associating the VLT LAG or VLT VLAN in a PVLAN.........................................................................................951
Proxy ARP Capability on VLT Peer Nodes................................................................................................................952
VLT Nodes as Rendezvous Points for Multicast Resiliency................................................................................. 953
Configuring VLAN-Stack over VLT............................................................................................................................ 953
IPv6 Peer Routing in VLT Domains Overview......................................................................................................... 956
Configure BFD in VLT Domain.....................................................................................................................................960
Sample BFD configuration in VLT domain.......................................................................................................... 960
Chapter 59: VLT Proxy Gateway................................................................................................ 965
Proxy Gateway in VLT Domains..................................................................................................................................965
LLDP VLT Proxy Gateway in a Square VLT Topology..................................................................................... 968
Configuring a Static VLT Proxy Gateway................................................................................................................. 969
Configuring an LLDP VLT Proxy Gateway................................................................................................................969
VLT Proxy Gateway Sample Topology.......................................................................................................................970
VLT Domain Configuration......................................................................................................................................970
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