Port-Based VLANs.......................................................................................................................... 1028
VLANs and Port Tagging.................................................................................................................1029
Configuration Task List...................................................................................................................1029
Creating a Port-Based VLAN.................................................................................................... 1029
Assigning Interfaces to a VLAN................................................................................................ 1030
Moving Untagged Interfaces.................................................................................................... 1032
Assigning an IP Address to a VLAN...........................................................................................1033
Configuring Native VLANs..............................................................................................................1033
Enabling Null VLAN as the Default VLAN.......................................................................................1034
60 Virtual Link Trunking (VLT)........................................................................ 1035
Overview......................................................................................................................................... 1035
VLT on Core Switches.............................................................................................................. 1036
Enhanced VLT........................................................................................................................... 1036
VLT Terminology.............................................................................................................................1037
Configure Virtual Link Trunking..................................................................................................... 1038
Important Points to Remember............................................................................................... 1038
Configuration Notes................................................................................................................. 1039
Primary and Secondary VLT Peers........................................................................................... 1043
RSTP and VLT............................................................................................................................1043
VLT Bandwidth Monitoring.......................................................................................................1044
VLT and Stacking...................................................................................................................... 1044
VLT and IGMP Snooping.......................................................................................................... 1044
VLT IPv6.....................................................................................................................................1044
VLT Port Delayed Restoration.................................................................................................. 1045
PIM-Sparse Mode Support on VLT...........................................................................................1045
VLT Routing ..............................................................................................................................1047
Non-VLT ARP Sync...................................................................................................................1049
RSTP Configuration........................................................................................................................ 1050
Preventing Forwarding Loops in a VLT Domain......................................................................1050
Sample RSTP Configuration..................................................................................................... 1050
Configuring VLT.........................................................................................................................1051
PVST+ Configuration......................................................................................................................1062
Sample PVST+ Configuration...................................................................................................1063
eVLT Configuration Example......................................................................................................... 1064
eVLT Configuration Step Examples......................................................................................... 1064
PIM-Sparse Mode Configuration Example....................................................................................1066
Verifying a VLT Configuration........................................................................................................ 1067
Additional VLT Sample Configurations...........................................................................................1071
Configuring Virtual Link Trunking (VLT Peer 1)Configuring Virtual Link Trunking (VLT Peer
2)Verifying a Port-Channel Connection to a VLT Domain (From an Attached Access
Switch)........................................................................................................................................1071
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