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UFD and NIC Teaming...................................................................................................................................................904
Important Points to Remember................................................................................................................................... 904
Conguring Uplink Failure Detection...........................................................................................................................905
Clearing a UFD-Disabled Interface.............................................................................................................................. 906
Displaying Uplink Failure Detection.............................................................................................................................. 907
Sample Conguration: Uplink Failure Detection.........................................................................................................909
57 Upgrade Procedures................................................................................................................................. 911
Get Help with Upgrades.................................................................................................................................................911
58 Virtual LANs (VLANs).............................................................................................................................. 912
Default VLAN.................................................................................................................................................................. 913
Port-Based VLANs.........................................................................................................................................................913
VLANs and Port Tagging............................................................................................................................................... 914
Conguration Task List.................................................................................................................................................. 914
Creating a Port-Based VLAN..................................................................................................................................914
Assigning Interfaces to a VLAN..............................................................................................................................915
Moving Untagged Interfaces.................................................................................................................................. 916
Assigning an IP Address to a VLAN........................................................................................................................917
Conguring Native VLANs............................................................................................................................................ 917
Enabling Null VLAN as the Default VLAN................................................................................................................... 918
59 Virtual Link Trunking (VLT).......................................................................................................................919
Overview......................................................................................................................................................................... 919
VLT Terminology.......................................................................................................................................................922
Layer-2 Trac in VLT Domains...............................................................................................................................923
Interspersed VLANs.................................................................................................................................................924
VLT on Core Switches.............................................................................................................................................924
Enhanced VLT.......................................................................................................................................................... 925
Congure Virtual Link Trunking.................................................................................................................................... 926
Important Points to Remember............................................................................................................................. 926
Conguration Notes.................................................................................................................................................927
Primary and Secondary VLT Peers........................................................................................................................930
RSTP and VLT..........................................................................................................................................................930
VLT Bandwidth Monitoring......................................................................................................................................931
VLT and Stacking......................................................................................................................................................931
VLT and IGMP Snooping......................................................................................................................................... 931
VLT IPv6.................................................................................................................................................................... 931
VLT Port Delayed Restoration................................................................................................................................ 932
PIM-Sparse Mode Support on VLT.......................................................................................................................932
VLT Routing .............................................................................................................................................................934
Non-VLT ARP Sync..................................................................................................................................................937
RSTP Conguration.......................................................................................................................................................938
Preventing Forwarding Loops in a VLT Domain................................................................................................... 938
Sample RSTP Conguration...................................................................................................................................938
Conguring VLT....................................................................................................................................................... 939
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