Reference Guide
57 Upgrade Procedures..........................................................................................961
Get Help with Upgrades....................................................................................................................961
58 Virtual LANs (VLANs)......................................................................................... 962
Default VLAN.....................................................................................................................................962
Port-Based VLANs............................................................................................................................ 963
VLANs and Port Tagging...................................................................................................................963
Configuration Task List.....................................................................................................................964
Creating a Port-Based VLAN......................................................................................................964
Assigning Interfaces to a VLAN...................................................................................................965
Moving Untagged Interfaces...................................................................................................... 967
Assigning an IP Address to a VLAN............................................................................................ 968
Configuring Native VLANs................................................................................................................968
Enabling Null VLAN as the Default VLAN.........................................................................................969
59 Virtual Link Trunking (VLT)..............................................................................970
Overview........................................................................................................................................... 970
VLT on Core Switches................................................................................................................. 971
Enhanced VLT..............................................................................................................................971
VLT Terminology...............................................................................................................................972
Configure Virtual Link Trunking........................................................................................................973
Important Points to Remember..................................................................................................973
Configuration Notes................................................................................................................... 974
Primary and Secondary VLT Peers..............................................................................................977
RSTP and VLT.............................................................................................................................. 978
VLT Bandwidth Monitoring.........................................................................................................978
VLT and Stacking.........................................................................................................................979
VLT and IGMP Snooping.............................................................................................................979
VLT IPv6.......................................................................................................................................979
VLT Port Delayed Restoration.................................................................................................... 979
PIM-Sparse Mode Support on VLT............................................................................................ 980
VLT Routing ................................................................................................................................ 981
Non-VLT ARP Sync.....................................................................................................................984
RSTP Configuration.......................................................................................................................... 984
Preventing Forwarding Loops in a VLT Domain........................................................................984
Sample RSTP Configuration....................................................................................................... 985
Configuring VLT..........................................................................................................................985
eVLT Configuration Example............................................................................................................997
eVLT Configuration Step Examples........................................................................................... 998
PIM-Sparse Mode Configuration Example....................................................................................1000
Verifying a VLT Configuration........................................................................................................ 1001