Users Guide

Assigning Interfaces to a VLAN..................................................................................................................... 908
Moving Untagged Interfaces......................................................................................................................... 909
Assigning an IP Address to a VLAN............................................................................................................... 910
Configuring Native VLANs....................................................................................................................................910
Enabling Null VLAN as the Default VLAN...........................................................................................................911
60 Virtual Link Trunking (VLT)............................................................................................................................. 912
Overview...................................................................................................................................................................912
VLT on Core Switches..................................................................................................................................... 913
Enhanced VLT................................................................................................................................................... 914
VLT Terminology.................................................................................................................................................... 914
Configure Virtual Link Trunking...........................................................................................................................915
Important Points to Remember.....................................................................................................................915
Configuration Notes........................................................................................................................................ 916
Primary and Secondary VLT Peers................................................................................................................919
RSTP and VLT.................................................................................................................................................... 919
VLT Bandwidth Monitoring.............................................................................................................................919
VLT and Stacking..............................................................................................................................................920
VLT and IGMP Snooping.................................................................................................................................920
VLT IPv6............................................................................................................................................................. 920
VLT Port Delayed Restoration....................................................................................................................... 920
PIM-Sparse Mode Support on VLT............................................................................................................... 921
VLT Routing ......................................................................................................................................................922
Non-VLT ARP Sync.......................................................................................................................................... 924
RSTP Configuration............................................................................................................................................... 924
Preventing Forwarding Loops in a VLT Domain........................................................................................ 925
Sample RSTP Configuration...........................................................................................................................925
Configuring VLT................................................................................................................................................926
PVST+ Configuration............................................................................................................................................ 936
Sample PVST+ Configuration........................................................................................................................936
eVLT Configuration Example...............................................................................................................................937
eVLT Configuration Step Examples..............................................................................................................938
PIM-Sparse Mode Configuration Example.......................................................................................................940
Verifying a VLT Configuration............................................................................................................................. 940
Additional VLT Sample Configurations..............................................................................................................943
Troubleshooting VLT.............................................................................................................................................945
Reconfiguring Stacked Switches as VLT........................................................................................................... 946
Specifying VLT Nodes in a PVLAN...................................................................................................................... 947
Association of VLTi as a Member of a PVLAN............................................................................................ 947
MAC Synchronization for VLT Nodes in a PVLAN.....................................................................................948
PVLAN Operations When One VLT Peer is Down.....................................................................................948
PVLAN Operations When a VLT Peer is Restarted.................................................................................... 948
Interoperation of VLT Nodes in a PVLAN with ARP Requests................................................................ 949
Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN................ 949
Configuring a VLT VLAN or LAG in a PVLAN....................................................................................................950
Creating a VLT LAG or a VLT VLAN.............................................................................................................. 950
Associating the VLT LAG or VLT VLAN in a PVLAN....................................................................................951
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