Administrator Guide

63 Virtual LANs (VLANs)......................................................................................................... 943
Default VLAN...........................................................................................................................944
Port-Based VLANs............................................................................................................945
VLANs and Port Tagging.................................................................................................945
Configuration Task List................................................................................................... 946
Configuring Native VLANs..............................................................................................949
Enabling Null VLAN as the Default VLAN..........................................................................950
64 Virtual Link Trunking (VLT)...............................................................................................951
Overview...................................................................................................................................951
Multi-domain VLT............................................................................................................ 952
VLT Terminology....................................................................................................................953
Configure Virtual Link Trunking.......................................................................................... 954
Important Points to Remember.................................................................................... 954
Configuration Notes........................................................................................................955
RSTP and VLT....................................................................................................................958
VLT Bandwidth Monitoring............................................................................................ 959
VLT and IGMP Snooping.................................................................................................959
VLT Port Delayed Restoration....................................................................................... 959
PIM-Sparse Mode Support on VLT...............................................................................960
VLT Multicast..................................................................................................................... 961
VLT Unicast Routing........................................................................................................ 962
Non-VLT ARP Sync.......................................................................................................... 963
RSTP Configuration...............................................................................................................964
Preventing Forwarding Loops in a VLT Domain........................................................964
Sample RSTP Configuration.......................................................................................... 964
Configuring VLT................................................................................................................965
Configuring a VLT Interconnect................................................................................... 966
Configuring a VLT Backup Link.....................................................................................966
Configuring a VLT Port Delay Period........................................................................... 967
Reconfiguring the Default VLT Settings (Optional) ..................................................967
Connecting a VLT Domain to an Attached Access Device (Switch or Server)... 968
Configuring a VLT VLAN Peer-Down (Optional).......................................................969
Configure Multi-domain VLT (mVLT) (Optional)....................................................... 970
Verifying a VLT Configuration........................................................................................972
Connecting a VLT Domain.............................................................................................976
PVST+ Configuration............................................................................................................ 980
Sample PVST+ Configuration........................................................................................980
mVLT Configuration Example............................................................................................. 982
In Domain 1, configure the VLT domain and VLTi on Peer 1Configure mVLT
on Peer 1Add links to the mVLT port-channel on Peer 1Next, configure the
Configuration Guide
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