Administrator Guide

Feature Description....................................................................................................................................................... 860
How Uplink Failure Detection Works............................................................................................................................861
UFD and NIC Teaming...................................................................................................................................................862
Important Points to Remember................................................................................................................................... 862
Conguring Uplink Failure Detection...........................................................................................................................863
Clearing a UFD-Disabled Interface.............................................................................................................................. 864
Displaying Uplink Failure Detection..............................................................................................................................865
Sample Conguration: Uplink Failure Detection.........................................................................................................867
55 Upgrade Procedures................................................................................................................................869
Get Help with Upgrades............................................................................................................................................... 869
56 Virtual LANs (VLANs).............................................................................................................................. 870
Default VLAN.................................................................................................................................................................. 871
Port-Based VLANs......................................................................................................................................................... 871
VLANs and Port Tagging...............................................................................................................................................872
Conguration Task List.................................................................................................................................................. 872
Creating a Port-Based VLAN................................................................................................................................. 872
Assigning Interfaces to a VLAN..............................................................................................................................873
Moving Untagged Interfaces.................................................................................................................................. 874
Assigning an IP Address to a VLAN.......................................................................................................................875
Conguring Native VLANs............................................................................................................................................875
Enabling Null VLAN as the Default VLAN...................................................................................................................876
57 Virtual Link Trunking (VLT)....................................................................................................................... 877
Overview......................................................................................................................................................................... 877
VLT Terminology...................................................................................................................................................... 880
Layer-2 Trac in VLT Domains............................................................................................................................... 881
Interspersed VLANs................................................................................................................................................ 882
VLT on Core Switches.............................................................................................................................................882
Enhanced VLT.......................................................................................................................................................... 883
Congure Virtual Link Trunking.................................................................................................................................... 884
Important Points to Remember............................................................................................................................. 884
Conguration Notes................................................................................................................................................ 885
Primary and Secondary VLT Peers........................................................................................................................888
RSTP and VLT..........................................................................................................................................................888
VLT Bandwidth Monitoring.....................................................................................................................................889
VLT and Stacking.....................................................................................................................................................889
VLT and IGMP Snooping........................................................................................................................................ 889
VLT IPv6................................................................................................................................................................... 889
VLT Port Delayed Restoration................................................................................................................................890
PIM-Sparse Mode Support on VLT.......................................................................................................................890
VLT Routing .............................................................................................................................................................892
Non-VLT ARP Sync................................................................................................................................................. 895
RSTP Conguration...................................................................................................................................................... 896
Preventing Forwarding Loops in a VLT Domain................................................................................................... 896
28
Contents