Setup Guide

Assigning Interfaces to a VLAN............................................................................................................................. 898
Moving Untagged Interfaces..................................................................................................................................899
Assigning an IP Address to a VLAN...................................................................................................................... 900
Conguring Native VLANs........................................................................................................................................... 900
Enabling Null VLAN as the Default VLAN................................................................................................................... 901
57 Virtual Link Trunking (VLT)...................................................................................................................... 902
Overview.........................................................................................................................................................................902
VLT Terminology...................................................................................................................................................... 905
Layer-2 Trac in VLT Domains.............................................................................................................................. 906
Interspersed VLANs.................................................................................................................................................907
VLT on Core Switches.............................................................................................................................................907
Enhanced VLT..........................................................................................................................................................908
Congure Virtual Link Trunking....................................................................................................................................909
Important Points to Remember............................................................................................................................. 909
Conguration Notes.................................................................................................................................................910
Primary and Secondary VLT Peers.........................................................................................................................913
RSTP and VLT...........................................................................................................................................................913
VLT Bandwidth Monitoring..................................................................................................................................... 914
VLT and Stacking......................................................................................................................................................914
VLT and IGMP Snooping......................................................................................................................................... 914
VLT IPv6.................................................................................................................................................................... 914
VLT Port Delayed Restoration.................................................................................................................................915
PIM-Sparse Mode Support on VLT........................................................................................................................915
VLT Routing ..............................................................................................................................................................917
Non-VLT ARP Sync................................................................................................................................................. 920
RSTP Conguration....................................................................................................................................................... 921
Preventing Forwarding Loops in a VLT Domain.................................................................................................... 921
Sample RSTP Conguration....................................................................................................................................921
Conguring VLT....................................................................................................................................................... 922
PVST+ Conguration.....................................................................................................................................................932
Sample PVST+ Conguration.................................................................................................................................932
Peer Routing Conguration Example.......................................................................................................................... 933
Dell-1 Switch Conguration.....................................................................................................................................934
Dell-2 Switch Conguration....................................................................................................................................938
R1 Conguration....................................................................................................................................................... 941
Access Switch A1 Congurations and Verication.............................................................................................. 942
eVLT Conguration Example........................................................................................................................................ 943
eVLT Conguration Step Examples.......................................................................................................................943
PIM-Sparse Mode Conguration Example.................................................................................................................945
Verifying a VLT Conguration...................................................................................................................................... 946
Additional VLT Sample Congurations........................................................................................................................ 949
Troubleshooting VLT.......................................................................................................................................................951
Reconguring Stacked Switches as VLT....................................................................................................................952
Specifying VLT Nodes in a PVLAN..............................................................................................................................952
Association of VLTi as a Member of a PVLAN.....................................................................................................953
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