Users Guide
57 Virtual Link Trunking (VLT)....................................................................................................................... 831
Overview......................................................................................................................................................................... 831
VLT on Core Switches.............................................................................................................................................832
Enhanced VLT.......................................................................................................................................................... 832
VLT Terminology.............................................................................................................................................................833
Congure Virtual Link Trunking.................................................................................................................................... 833
Important Points to Remember............................................................................................................................. 833
Conguration Notes................................................................................................................................................ 835
Primary and Secondary VLT Peers........................................................................................................................ 837
RSTP and VLT..........................................................................................................................................................838
VLT Bandwidth Monitoring.....................................................................................................................................838
VLT and IGMP Snooping.........................................................................................................................................838
VLT IPv6................................................................................................................................................................... 838
VLT Port Delayed Restoration................................................................................................................................839
PIM-Sparse Mode Support on VLT.......................................................................................................................839
VLT Routing ..............................................................................................................................................................841
Non-VLT ARP Sync................................................................................................................................................. 843
RSTP Conguration.......................................................................................................................................................843
Preventing Forwarding Loops in a VLT Domain................................................................................................... 843
Sample RSTP Conguration...................................................................................................................................844
Conguring VLT....................................................................................................................................................... 844
PVST+ Conguration.................................................................................................................................................... 854
Sample PVST+ Conguration.................................................................................................................................854
eVLT Conguration Example........................................................................................................................................855
eVLT Conguration Step Examples.......................................................................................................................856
PIM-Sparse Mode Conguration Example.................................................................................................................858
Verifying a VLT Conguration...................................................................................................................................... 858
Additional VLT Sample Congurations........................................................................................................................ 862
Troubleshooting VLT......................................................................................................................................................863
Reconguring Stacked Switches as VLT....................................................................................................................864
Specifying VLT Nodes in a PVLAN..............................................................................................................................865
Association of VLTi as a Member of a PVLAN.................................................................................................... 865
MAC Synchronization for VLT Nodes in a PVLAN.............................................................................................. 866
PVLAN Operations When One VLT Peer is Down...............................................................................................866
PVLAN Operations When a VLT Peer is Restarted.............................................................................................866
Interoperation of VLT Nodes in a PVLAN with ARP Requests..........................................................................866
Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN............................ 867
Conguring a VLT VLAN or LAG in a PVLAN............................................................................................................ 868
Creating a VLT LAG or a VLT VLAN......................................................................................................................868
Associating the VLT LAG or VLT VLAN in a PVLAN...........................................................................................869
Proxy ARP Capability on VLT Peer Nodes..................................................................................................................870
Working of Proxy ARP for VLT Peer Nodes......................................................................................................... 870
VLT Nodes as Rendezvous Points for Multicast Resiliency...................................................................................... 871
Conguring VLAN-Stack over VLT..............................................................................................................................872
58 Virtual Extensible LAN (VXLAN).............................................................................................................. 876
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