Administrator Guide

Chapter 59: Upgrade Procedures...............................................................................................907
Chapter 60: Virtual LANs (VLANs).............................................................................................908
Default VLAN................................................................................................................................................................... 908
Port-Based VLANs......................................................................................................................................................... 909
VLANs and Port Tagging.............................................................................................................................................. 909
Configuration Task List.................................................................................................................................................. 910
Creating a Port-Based VLAN..................................................................................................................................910
Assigning Interfaces to a VLAN.............................................................................................................................. 911
Moving Untagged Interfaces.................................................................................................................................. 912
Assigning an IP Address to a VLAN.......................................................................................................................913
Configuring Native VLANs.............................................................................................................................................913
Enabling Null VLAN as the Default VLAN.................................................................................................................. 914
Chapter 61: Virtual Link Trunking (VLT)..................................................................................... 915
Overview............................................................................................................................................................................915
VLT Terminology........................................................................................................................................................ 917
Layer-2 Traffic in VLT Domains............................................................................................................................. 918
Interspersed VLANs.................................................................................................................................................. 919
VLT on Core Switches..............................................................................................................................................919
Enhanced VLT............................................................................................................................................................920
Configure Virtual Link Trunking....................................................................................................................................921
Important Points to Remember.............................................................................................................................. 921
Configuration Notes................................................................................................................................................. 923
Primary and Secondary VLT Peers.......................................................................................................................925
RSTP and VLT........................................................................................................................................................... 926
VLT Bandwidth Monitoring.....................................................................................................................................926
VLT and Stacking......................................................................................................................................................926
VLT and IGMP Snooping......................................................................................................................................... 927
VLT IPv6......................................................................................................................................................................927
VLT Port Delayed Restoration............................................................................................................................... 927
PIM-Sparse Mode Support on VLT.......................................................................................................................927
VLT Routing .............................................................................................................................................................. 929
Non-VLT ARP Sync.................................................................................................................................................. 932
RSTP Configuration........................................................................................................................................................932
Preventing Forwarding Loops in a VLT Domain................................................................................................ 932
Sample RSTP configuration....................................................................................................................................933
Configuring VLT.........................................................................................................................................................933
PVST+ Configuration..................................................................................................................................................... 942
Peer Routing Configuration Example......................................................................................................................... 943
Dell-1 Switch Configuration.................................................................................................................................... 944
Dell-2 Switch Configuration................................................................................................................................... 948
R1 Configuration.........................................................................................................................................................951
Access Switch A1 Configurations and Verification........................................................................................... 952
eVLT Configuration Example........................................................................................................................................952
PIM-Sparse Mode Configuration Example............................................................................................................... 955
Verifying a VLT Configuration..................................................................................................................................... 955
Additional VLT Sample Configurations...................................................................................................................... 958
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