Install Guide

Table Of Contents
Multipoint Receive-Only Tunnels................................................................................................................................ 807
Chapter 55: Uplink Failure Detection (UFD).............................................................................. 808
Feature Description........................................................................................................................................................808
How Uplink Failure Detection Works......................................................................................................................... 809
UFD and NIC Teaming....................................................................................................................................................810
Important Points to Remember....................................................................................................................................810
Configuring Uplink Failure Detection........................................................................................................................... 811
Clearing a UFD-Disabled Interface.............................................................................................................................. 812
Displaying Uplink Failure Detection............................................................................................................................. 812
Sample Configuration: Uplink Failure Detection.......................................................................................................813
Chapter 56: Upgrade Procedures............................................................................................... 814
Chapter 57: Virtual LANs (VLANs)............................................................................................. 815
Default VLAN....................................................................................................................................................................815
Port-Based VLANs.......................................................................................................................................................... 816
VLANs and Port Tagging............................................................................................................................................... 816
Configuration Task List.................................................................................................................................................. 817
Creating a Port-Based VLAN.................................................................................................................................. 817
Assigning Interfaces to a VLAN..............................................................................................................................817
Moving Untagged Interfaces.................................................................................................................................. 818
Assigning an IP Address to a VLAN.......................................................................................................................818
Configuring Native VLANs............................................................................................................................................ 819
Enabling Null VLAN as the Default VLAN.................................................................................................................. 819
Chapter 58: Virtual Link Trunking (VLT).................................................................................... 820
Overview...........................................................................................................................................................................820
VLT Terminology....................................................................................................................................................... 822
Layer-2 Traffic in VLT Domains.............................................................................................................................823
Interspersed VLANs..................................................................................................................................................824
VLT on Core Switches............................................................................................................................................. 824
Enhanced VLT............................................................................................................................................................825
Configure Virtual Link Trunking...................................................................................................................................826
Important Points to Remember............................................................................................................................. 826
Configuration Notes................................................................................................................................................. 827
Primary and Secondary VLT Peers....................................................................................................................... 830
RSTP and VLT........................................................................................................................................................... 830
VLT Bandwidth Monitoring.....................................................................................................................................830
VLT and Stacking.......................................................................................................................................................831
VLT and IGMP Snooping..........................................................................................................................................831
VLT IPv6...................................................................................................................................................................... 831
VLT Port Delayed Restoration................................................................................................................................ 831
PIM-Sparse Mode Support on VLT....................................................................................................................... 831
VLT Routing .............................................................................................................................................................. 833
Non-VLT ARP Sync.................................................................................................................................................. 836
RSTP Configuration........................................................................................................................................................836
Preventing Forwarding Loops in a VLT Domain................................................................................................ 836
Sample RSTP configuration....................................................................................................................................837
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