Administrator Guide

How Uplink Failure Detection Works..........................................................................................................................968
UFD and NIC Teaming................................................................................................................................................... 969
Important Points to Remember...................................................................................................................................969
Configuring Uplink Failure Detection..........................................................................................................................970
Clearing a UFD-Disabled Interface.............................................................................................................................. 971
Displaying Uplink Failure Detection.............................................................................................................................972
Sample Configuration: Uplink Failure Detection...................................................................................................... 974
Chapter 60: Upgrade Procedures...............................................................................................976
Chapter 61: Virtual LANs (VLANs)..............................................................................................977
Default VLAN....................................................................................................................................................................977
Port-Based VLANs..........................................................................................................................................................978
VLANs and Port Tagging...............................................................................................................................................978
Configuration Task List..................................................................................................................................................979
Creating a Port-Based VLAN................................................................................................................................. 979
Assigning Interfaces to a VLAN.............................................................................................................................980
Moving Untagged Interfaces.................................................................................................................................. 981
Assigning an IP Address to a VLAN...................................................................................................................... 982
Configuring Native VLANs............................................................................................................................................982
Enabling Null VLAN as the Default VLAN................................................................................................................. 983
Chapter 62: Virtual Link Trunking (VLT).................................................................................... 984
Overview...........................................................................................................................................................................984
VLT Terminology....................................................................................................................................................... 986
Layer-2 Traffic in VLT Domains.............................................................................................................................987
Interspersed VLANs..................................................................................................................................................988
VLT on Core Switches............................................................................................................................................. 988
Enhanced VLT............................................................................................................................................................989
Configure Virtual Link Trunking...................................................................................................................................990
Important Points to Remember.............................................................................................................................990
Configuration Notes................................................................................................................................................. 992
Primary and Secondary VLT Peers....................................................................................................................... 994
RSTP and VLT........................................................................................................................................................... 995
VLT Bandwidth Monitoring.....................................................................................................................................995
VLT and Stacking......................................................................................................................................................995
VLT and IGMP Snooping.........................................................................................................................................996
VLT IPv6......................................................................................................................................................................996
VLT Port Delayed Restoration............................................................................................................................... 996
Additional ARP Refresh on VLTi............................................................................................................................996
PIM-Sparse Mode Support on VLT...................................................................................................................... 997
VLT Routing .............................................................................................................................................................. 999
Non-VLT ARP Sync................................................................................................................................................ 1002
RSTP Configuration......................................................................................................................................................1002
Preventing Forwarding Loops in a VLT Domain...............................................................................................1002
Sample RSTP configuration.................................................................................................................................. 1003
Configuring VLT.......................................................................................................................................................1003
PVST+ Configuration.................................................................................................................................................... 1012
Peer Routing Configuration Example........................................................................................................................ 1013
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