Administrator Guide
Layer-2 Traffic in VLT Domains.................................................................................................................................903
Interspersed VLANs....................................................................................................................................................904
VLT on Core Switches................................................................................................................................................905
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.................................................................................................................................... 911
PIM-Sparse Mode Support on VLT........................................................................................................................... 912
VLT Routing .................................................................................................................................................................913
Non-VLT ARP Sync.....................................................................................................................................................916
RSTP Configuration...........................................................................................................................................................916
Preventing Forwarding Loops in a VLT Domain.......................................................................................................916
Sample RSTP configuration........................................................................................................................................917
Configuring VLT............................................................................................................................................................917
PVST+ Configuration........................................................................................................................................................926
Peer Routing Configuration Example............................................................................................................................. 926
Dell-1 Switch Configuration........................................................................................................................................927
Dell-2 Switch Configuration........................................................................................................................................931
R1 Configuration.......................................................................................................................................................... 934
Access Switch A1 Configurations and Verification................................................................................................. 935
eVLT Configuration Example...........................................................................................................................................935
PIM-Sparse Mode Configuration Example.................................................................................................................... 938
Verifying a VLT Configuration......................................................................................................................................... 938
Additional VLT Sample Configurations............................................................................................................................941
Troubleshooting VLT........................................................................................................................................................ 943
Reconfiguring Stacked Switches as VLT.......................................................................................................................944
Specifying VLT Nodes in a PVLAN................................................................................................................................. 944
Configuring a VLT VLAN or LAG in a PVLAN................................................................................................................947
Creating a VLT LAG or a VLT VLAN.........................................................................................................................947
Associating the VLT LAG or VLT VLAN in a PVLAN..............................................................................................948
Proxy ARP Capability on VLT Peer Nodes.....................................................................................................................949
VLT Nodes as Rendezvous Points for Multicast Resiliency........................................................................................950
Configuring VLAN-Stack over VLT................................................................................................................................ 950
IPv6 Peer Routing in VLT Domains Overview...............................................................................................................953
Configure BFD in VLT Domain.........................................................................................................................................957
Sample BFD configuration in VLT domain................................................................................................................957
VXLAN on VLT...................................................................................................................................................................961
59 VLT Proxy Gateway.................................................................................................................963
Proxy Gateway in VLT Domains......................................................................................................................................963
LLDP VLT Proxy Gateway in a Square VLT Topology........................................................................................... 966
Configuring a Static VLT Proxy Gateway...................................................................................................................... 967
Configuring an LLDP VLT Proxy Gateway.....................................................................................................................967
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