Users Guide

Displaying Uplink Failure Detection................................................................................................................................. 809
Sample Configuration: Uplink Failure Detection..............................................................................................................811
Chapter 58: Upgrade Procedures.................................................................................................. 812
Chapter 59: Virtual LANs (VLANs)................................................................................................ 813
Default VLAN......................................................................................................................................................................813
Port-Based VLANs.............................................................................................................................................................814
VLANs and Port Tagging.................................................................................................................................................. 814
Configuration Task List..................................................................................................................................................... 815
Creating a Port-Based VLAN..................................................................................................................................... 815
Assigning Interfaces to a VLAN................................................................................................................................. 815
Moving Untagged Interfaces......................................................................................................................................816
Assigning an IP Address to a VLAN........................................................................................................................... 817
Configuring Native VLANs................................................................................................................................................818
Enabling Null VLAN as the Default VLAN....................................................................................................................... 818
Chapter 60: VLT Proxy Gateway................................................................................................... 819
Proxy Gateway in VLT Domains.......................................................................................................................................819
Configuring an LLDP VLT Proxy Gateway.....................................................................................................................823
Configuring a Static VLT Proxy Gateway...................................................................................................................... 823
Chapter 61: Virtual Link Trunking (VLT)........................................................................................ 824
Overview............................................................................................................................................................................ 824
VLT on Core Switches................................................................................................................................................825
Enhanced VLT............................................................................................................................................................. 825
VLT Terminology............................................................................................................................................................... 826
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.........................................................................................................................................831
VLT and Stacking.........................................................................................................................................................831
VLT and IGMP Snooping.............................................................................................................................................831
VLT IPv6........................................................................................................................................................................831
VLT Port Delayed Restoration....................................................................................................................................831
PIM-Sparse Mode Support on VLT.......................................................................................................................... 832
VLT Routing ................................................................................................................................................................ 833
Non-VLT ARP Sync.................................................................................................................................................... 835
RSTP Configuration..........................................................................................................................................................835
Preventing Forwarding Loops in a VLT Domain......................................................................................................835
Sample RSTP Configuration...................................................................................................................................... 835
Configuring VLT...........................................................................................................................................................836
PVST+ Configuration........................................................................................................................................................844
eVLT Configuration Example...........................................................................................................................................845
PIM-Sparse Mode Configuration Example.................................................................................................................... 848
Verifying a VLT Configuration......................................................................................................................................... 848
Additional VLT Sample Configurations............................................................................................................................851
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Contents