Concept Guide

UFD and NIC Teaming................................................................................................................................................. 1026
Important Points to Remember..................................................................................................................................1026
Conguring Uplink Failure Detection..........................................................................................................................1027
Clearing a UFD-Disabled Interface.............................................................................................................................1028
Displaying Uplink Failure Detection............................................................................................................................ 1029
Sample Conguration: Uplink Failure Detection........................................................................................................ 1031
60 Upgrade Procedures...............................................................................................................................1033
Get Help with Upgrades..............................................................................................................................................1033
61 Virtual LANs (VLANs)............................................................................................................................. 1034
Default VLAN................................................................................................................................................................1035
Port-Based VLANs.......................................................................................................................................................1035
VLANs and Port Tagging.............................................................................................................................................1036
Conguration Task List................................................................................................................................................ 1036
Creating a Port-Based VLAN................................................................................................................................1036
Assigning Interfaces to a VLAN............................................................................................................................ 1037
Moving Untagged Interfaces................................................................................................................................ 1038
Assigning an IP Address to a VLAN..................................................................................................................... 1039
Conguring Native VLANs..........................................................................................................................................1039
Enabling Null VLAN as the Default VLAN.................................................................................................................1040
62 Virtual Link Trunking (VLT)......................................................................................................................1041
Overview........................................................................................................................................................................1041
VLT Terminology.....................................................................................................................................................1044
Layer-2 Trac in VLT Domains.............................................................................................................................1045
Interspersed VLANs...............................................................................................................................................1046
VLT on Core Switches...........................................................................................................................................1046
Enhanced VLT.........................................................................................................................................................1047
Congure Virtual Link Trunking.................................................................................................................................. 1048
Important Points to Remember............................................................................................................................1048
Conguration Notes...............................................................................................................................................1049
Primary and Secondary VLT Peers...................................................................................................................... 1052
RSTP and VLT........................................................................................................................................................ 1053
VLT Bandwidth Monitoring................................................................................................................................... 1053
VLT and Stacking................................................................................................................................................... 1053
VLT and IGMP Snooping.......................................................................................................................................1053
VLT IPv6..................................................................................................................................................................1054
VLT Port Delayed Restoration.............................................................................................................................. 1054
PIM-Sparse Mode Support on VLT..................................................................................................................... 1054
VLT Routing ........................................................................................................................................................... 1056
Non-VLT ARP Sync................................................................................................................................................1059
RSTP Conguration.....................................................................................................................................................1060
Preventing Forwarding Loops in a VLT Domain................................................................................................. 1060
Sample RSTP conguration..................................................................................................................................1060
Conguring VLT...................................................................................................................................................... 1061
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