Users Guide

How Uplink Failure Detection Works...........................................................................................................................889
UFD and NIC Teaming...................................................................................................................................................890
Important Points to Remember................................................................................................................................... 890
Conguring Uplink Failure Detection............................................................................................................................891
Clearing a UFD-Disabled Interface.............................................................................................................................. 892
Displaying Uplink Failure Detection..............................................................................................................................893
Sample Conguration: Uplink Failure Detection.........................................................................................................895
54 Upgrade Procedures................................................................................................................................ 897
Get Help with Upgrades................................................................................................................................................897
55 Virtual LANs (VLANs)..............................................................................................................................898
Default VLAN................................................................................................................................................................. 899
Port-Based VLANs........................................................................................................................................................ 899
VLANs and Port Tagging.............................................................................................................................................. 900
Conguration Task List................................................................................................................................................. 900
Creating a Port-Based VLAN.................................................................................................................................900
Assigning Interfaces to a VLAN..............................................................................................................................901
Moving Untagged Interfaces..................................................................................................................................902
Assigning an IP Address to a VLAN.......................................................................................................................903
Conguring Native VLANs........................................................................................................................................... 903
Enabling Null VLAN as the Default VLAN.................................................................................................................. 904
56 Virtual Link Trunking (VLT)...................................................................................................................... 905
Overview........................................................................................................................................................................ 905
VLT Terminology...................................................................................................................................................... 908
Layer-2 Trac in VLT Domains.............................................................................................................................. 909
Interspersed VLANs................................................................................................................................................. 910
VLT on Core Switches............................................................................................................................................. 910
Enhanced VLT............................................................................................................................................................911
Congure Virtual Link Trunking.....................................................................................................................................912
Important Points to Remember.............................................................................................................................. 912
Conguration Notes.................................................................................................................................................913
Primary and Secondary VLT Peers.........................................................................................................................916
RSTP and VLT...........................................................................................................................................................916
VLT Bandwidth Monitoring......................................................................................................................................917
VLT and Stacking......................................................................................................................................................917
VLT and IGMP Snooping......................................................................................................................................... 917
VLT IPv6.................................................................................................................................................................... 917
VLT Port Delayed Restoration.................................................................................................................................918
PIM-Sparse Mode Support on VLT........................................................................................................................918
VLT Routing .............................................................................................................................................................920
Non-VLT ARP Sync................................................................................................................................................. 923
RSTP Conguration.......................................................................................................................................................924
Preventing Forwarding Loops in a VLT Domain................................................................................................... 924
Sample RSTP Conguration...................................................................................................................................924
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