Users Guide

Sample Conguration: Uplink Failure Detection.........................................................................................................950
58 Upgrade Procedures................................................................................................................................952
Get Help with Upgrades............................................................................................................................................... 952
59 Virtual LANs (VLANs)..............................................................................................................................953
Default VLAN................................................................................................................................................................. 954
Port-Based VLANs........................................................................................................................................................ 954
VLANs and Port Tagging.............................................................................................................................................. 955
Conguration Task List................................................................................................................................................. 955
Creating a Port-Based VLAN.................................................................................................................................955
Assigning Interfaces to a VLAN............................................................................................................................. 956
Moving Untagged Interfaces..................................................................................................................................957
Assigning an IP Address to a VLAN.......................................................................................................................958
Conguring Native VLANs........................................................................................................................................... 958
Enabling Null VLAN as the Default VLAN.................................................................................................................. 959
60 Virtual Link Trunking (VLT)...................................................................................................................... 960
Overview........................................................................................................................................................................ 960
VLT Terminology...................................................................................................................................................... 963
Layer-2 Trac in VLT Domains...............................................................................................................................964
Interspersed VLANs................................................................................................................................................ 965
VLT on Core Switches............................................................................................................................................ 965
Enhanced VLT..........................................................................................................................................................966
Congure Virtual Link Trunking.................................................................................................................................... 967
Important Points to Remember..............................................................................................................................967
Conguration Notes................................................................................................................................................ 968
Primary and Secondary VLT Peers.........................................................................................................................971
RSTP and VLT...........................................................................................................................................................971
VLT Bandwidth Monitoring.....................................................................................................................................972
VLT and Stacking..................................................................................................................................................... 972
VLT and IGMP Snooping.........................................................................................................................................972
VLT IPv6....................................................................................................................................................................972
VLT Port Delayed Restoration................................................................................................................................ 973
PIM-Sparse Mode Support on VLT....................................................................................................................... 973
VLT Routing .............................................................................................................................................................975
Non-VLT ARP Sync..................................................................................................................................................978
RSTP Conguration.......................................................................................................................................................979
Preventing Forwarding Loops in a VLT Domain................................................................................................... 979
Sample RSTP Conguration...................................................................................................................................979
Conguring VLT....................................................................................................................................................... 980
PVST+ Conguration.................................................................................................................................................... 990
Sample PVST+ Conguration................................................................................................................................ 990
Peer Routing Conguration Example...........................................................................................................................991
Dell-1 Switch Conguration.....................................................................................................................................992
Dell-2 Switch Conguration....................................................................................................................................996
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