Administrator Guide

How Uplink Failure Detection Works...............................................................................................................................913
UFD and NIC Teaming.......................................................................................................................................................914
Important Points to Remember....................................................................................................................................... 914
Configuring Uplink Failure Detection...............................................................................................................................915
Clearing a UFD-Disabled Interface.................................................................................................................................. 916
Displaying Uplink Failure Detection.................................................................................................................................. 917
Sample Configuration: Uplink Failure Detection.............................................................................................................918
60 Upgrade Procedures............................................................................................................... 920
61 Virtual LANs (VLANs)...............................................................................................................921
Default VLAN......................................................................................................................................................................921
Port-Based VLANs............................................................................................................................................................922
VLANs and Port Tagging..................................................................................................................................................922
Configuration Task List.....................................................................................................................................................923
Creating a Port-Based VLAN.....................................................................................................................................923
Assigning Interfaces to a VLAN.................................................................................................................................923
Moving Untagged Interfaces..................................................................................................................................... 924
Assigning an IP Address to a VLAN.......................................................................................................................... 925
Configuring Native VLANs...............................................................................................................................................926
Enabling Null VLAN as the Default VLAN...................................................................................................................... 926
62 Virtual Link Trunking (VLT)......................................................................................................927
Overview............................................................................................................................................................................ 927
VLT Terminology......................................................................................................................................................... 929
Layer-2 Traffic in VLT Domains.................................................................................................................................929
Interspersed VLANs....................................................................................................................................................930
VLT on Core Switches.................................................................................................................................................931
Enhanced VLT.............................................................................................................................................................. 931
Configure Virtual Link Trunking....................................................................................................................................... 932
Important Points to Remember.................................................................................................................................932
Configuration Notes....................................................................................................................................................933
Primary and Secondary VLT Peers........................................................................................................................... 936
RSTP and VLT............................................................................................................................................................. 936
VLT Bandwidth Monitoring........................................................................................................................................ 937
VLT and Stacking........................................................................................................................................................ 937
VLT and IGMP Snooping............................................................................................................................................ 937
VLT IPv6....................................................................................................................................................................... 937
VLT Port Delayed Restoration................................................................................................................................... 937
PIM-Sparse Mode Support on VLT.......................................................................................................................... 938
VLT Routing ................................................................................................................................................................ 939
Non-VLT ARP Sync.................................................................................................................................................... 942
RSTP Configuration.......................................................................................................................................................... 942
Preventing Forwarding Loops in a VLT Domain......................................................................................................942
Sample RSTP configuration....................................................................................................................................... 943
Configuring VLT...........................................................................................................................................................943
PVST+ Configuration........................................................................................................................................................952
Peer Routing Configuration Example............................................................................................................................. 953
Dell-1 Switch Configuration........................................................................................................................................953
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