White Papers

Table Of Contents
Interspersed VLANs..................................................................................................................................................904
VLT on Core Switches............................................................................................................................................. 904
Enhanced VLT........................................................................................................................................................... 905
Configure Virtual Link Trunking...................................................................................................................................906
Important Points to Remember.............................................................................................................................906
Configuration Notes................................................................................................................................................. 907
Primary and Secondary VLT Peers........................................................................................................................910
RSTP and VLT............................................................................................................................................................ 910
VLT Bandwidth Monitoring...................................................................................................................................... 911
VLT and Stacking....................................................................................................................................................... 911
VLT and IGMP Snooping...........................................................................................................................................911
VLT IPv6....................................................................................................................................................................... 911
VLT Port Delayed Restoration................................................................................................................................912
PIM-Sparse Mode Support on VLT....................................................................................................................... 912
VLT Routing ............................................................................................................................................................... 914
Non-VLT ARP Sync................................................................................................................................................... 917
RSTP Configuration........................................................................................................................................................ 917
Preventing Forwarding Loops in a VLT Domain................................................................................................. 917
Sample RSTP configuration.................................................................................................................................... 918
Configuring VLT......................................................................................................................................................... 918
PVST+ Configuration..................................................................................................................................................... 927
Peer Routing Configuration Example......................................................................................................................... 928
Dell-1 Switch Configuration.................................................................................................................................... 928
Dell-2 Switch Configuration................................................................................................................................... 932
R1 Configuration........................................................................................................................................................935
Access Switch A1 Configurations and Verification........................................................................................... 936
eVLT Configuration Example........................................................................................................................................937
PIM-Sparse Mode Configuration Example................................................................................................................939
Verifying a VLT Configuration..................................................................................................................................... 939
Additional VLT Sample Configurations...................................................................................................................... 943
Troubleshooting VLT......................................................................................................................................................944
Reconfiguring Stacked Switches as VLT.................................................................................................................. 945
Specifying VLT Nodes in a PVLAN.............................................................................................................................946
Configuring a VLT VLAN or LAG in a PVLAN.......................................................................................................... 949
Creating a VLT LAG or a VLT VLAN.................................................................................................................... 949
Associating the VLT LAG or VLT VLAN in a PVLAN........................................................................................950
Proxy ARP Capability on VLT Peer Nodes................................................................................................................ 951
VLT Nodes as Rendezvous Points for Multicast Resiliency................................................................................. 952
Configuring VLAN-Stack over VLT............................................................................................................................ 952
IPv6 Peer Routing in VLT Domains Overview......................................................................................................... 955
Configure BFD in VLT Domain.....................................................................................................................................959
Sample BFD configuration in VLT domain.......................................................................................................... 959
Chapter 59: VLT Proxy Gateway................................................................................................ 964
Proxy Gateway in VLT Domains.................................................................................................................................. 964
LLDP VLT Proxy Gateway in a Square VLT Topology..................................................................................... 967
Configuring a Static VLT Proxy Gateway................................................................................................................. 968
Configuring an LLDP VLT Proxy Gateway................................................................................................................968
VLT Proxy Gateway Sample Topology...................................................................................................................... 969
VLT Domain Configuration......................................................................................................................................969
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