Users Guide
56 Virtual Link Trunking (VLT)...................................................................................................................... 835
Overview.........................................................................................................................................................................835
VLT on Core Switches.............................................................................................................................................836
Enhanced VLT.......................................................................................................................................................... 836
VLT Terminology.............................................................................................................................................................837
Congure Virtual Link Trunking.................................................................................................................................... 837
Important Points to Remember..............................................................................................................................837
Conguration Notes................................................................................................................................................ 839
Primary and Secondary VLT Peers.........................................................................................................................841
RSTP and VLT..........................................................................................................................................................842
VLT Bandwidth Monitoring.....................................................................................................................................842
VLT and IGMP Snooping.........................................................................................................................................842
VLT IPv6....................................................................................................................................................................842
VLT Port Delayed Restoration................................................................................................................................843
PIM-Sparse Mode Support on VLT.......................................................................................................................843
VLT Routing .............................................................................................................................................................845
Non-VLT ARP Sync................................................................................................................................................. 847
RSTP Conguration.......................................................................................................................................................847
Preventing Forwarding Loops in a VLT Domain................................................................................................... 847
Sample RSTP Conguration...................................................................................................................................848
Conguring VLT....................................................................................................................................................... 848
PVST+ Conguration.................................................................................................................................................... 858
Sample PVST+ Conguration.................................................................................................................................858
eVLT Conguration Example........................................................................................................................................859
eVLT Conguration Step Examples.......................................................................................................................860
PIM-Sparse Mode Conguration Example.................................................................................................................862
Verifying a VLT Conguration...................................................................................................................................... 862
Additional VLT Sample Congurations........................................................................................................................866
Troubleshooting VLT...................................................................................................................................................... 867
Reconguring Stacked Switches as VLT.................................................................................................................... 868
Specifying VLT Nodes in a PVLAN..............................................................................................................................869
Association of VLTi as a Member of a PVLAN.....................................................................................................869
MAC Synchronization for VLT Nodes in a PVLAN.............................................................................................. 870
PVLAN Operations When One VLT Peer is Down...............................................................................................870
PVLAN Operations When a VLT Peer is Restarted............................................................................................. 870
Interoperation of VLT Nodes in a PVLAN with ARP Requests.......................................................................... 870
Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN............................. 871
Conguring a VLT VLAN or LAG in a PVLAN.............................................................................................................872
Creating a VLT LAG or a VLT VLAN...................................................................................................................... 872
Associating the VLT LAG or VLT VLAN in a PVLAN........................................................................................... 873
Proxy ARP Capability on VLT Peer Nodes.................................................................................................................. 874
Working of Proxy ARP for VLT Peer Nodes..........................................................................................................874
VLT Nodes as Rendezvous Points for Multicast Resiliency......................................................................................875
Conguring VLAN-Stack over VLT..............................................................................................................................876
57 Virtual Extensible LAN (VXLAN)..............................................................................................................880
28
Contents