Administrator Guide

Feature Description........................................................................................................................................................891
How Uplink Failure Detection Works........................................................................................................................... 892
UFD and NIC Teaming...................................................................................................................................................893
Important Points to Remember................................................................................................................................... 893
Conguring Uplink Failure Detection...........................................................................................................................894
Clearing a UFD-Disabled Interface.............................................................................................................................. 895
Displaying Uplink Failure Detection..............................................................................................................................896
Sample Conguration: Uplink Failure Detection.........................................................................................................898
54 Upgrade Procedures................................................................................................................................900
Get Help with Upgrades............................................................................................................................................... 900
55 Virtual LANs (VLANs).............................................................................................................................. 901
Default VLAN................................................................................................................................................................. 902
Port-Based VLANs........................................................................................................................................................ 902
VLANs and Port Tagging.............................................................................................................................................. 903
Conguration Task List..................................................................................................................................................903
Creating a Port-Based VLAN.................................................................................................................................903
Assigning Interfaces to a VLAN............................................................................................................................. 904
Moving Untagged Interfaces................................................................................................................................. 905
Assigning an IP Address to a VLAN.......................................................................................................................906
Conguring Native VLANs........................................................................................................................................... 906
Enabling Null VLAN as the Default VLAN...................................................................................................................907
56 Virtual Link Trunking (VLT)...................................................................................................................... 908
Overview........................................................................................................................................................................ 908
VLT Terminology........................................................................................................................................................911
Layer-2 Trac in VLT Domains............................................................................................................................... 912
Interspersed VLANs................................................................................................................................................. 913
VLT on Core Switches............................................................................................................................................. 913
Enhanced VLT...........................................................................................................................................................914
Congure Virtual Link Trunking.....................................................................................................................................915
Important Points to Remember..............................................................................................................................915
Conguration Notes.................................................................................................................................................916
Primary and Secondary VLT Peers.........................................................................................................................919
RSTP and VLT...........................................................................................................................................................919
VLT Bandwidth Monitoring.....................................................................................................................................920
VLT and Stacking.....................................................................................................................................................920
VLT and IGMP Snooping........................................................................................................................................ 920
VLT IPv6................................................................................................................................................................... 920
VLT Port Delayed Restoration.................................................................................................................................921
PIM-Sparse Mode Support on VLT........................................................................................................................921
VLT Routing .............................................................................................................................................................923
Non-VLT ARP Sync................................................................................................................................................. 926
RSTP Conguration.......................................................................................................................................................927
Preventing Forwarding Loops in a VLT Domain................................................................................................... 927
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