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57 Virtual LANs (VLANs)...................................................................................... 913
Default VLAN..................................................................................................................................... 913
Port-Based VLANs.............................................................................................................................914
VLANs and Port Tagging...................................................................................................................914
Configuration Task List..................................................................................................................... 915
Creating a Port-Based VLAN.......................................................................................................915
Assigning Interfaces to a VLAN...................................................................................................916
Moving Untagged Interfaces.......................................................................................................917
Assigning an IP Address to a VLAN.............................................................................................918
Configuring Native VLANs................................................................................................................ 919
Enabling Null VLAN as the Default VLAN.........................................................................................920
58 Virtual Routing and Forwarding (VRF)....................................................... 921
VRF Overview.................................................................................................................................... 921
VRF Configuration Notes..................................................................................................................922
DHCP...........................................................................................................................................925
VRF Configuration.............................................................................................................................925
Load VRF CAM.............................................................................................................................925
Creating a Non-Default VRF Instance........................................................................................925
Assigning an Interface to a VRF..................................................................................................925
Assigning a Front-end Port to a Management VRF...................................................................926
View VRF Instance Information..................................................................................................926
Assigning an OSPF Process to a VRF Instance...........................................................................927
Configuring VRRP on a VRF Instance.........................................................................................927
Configuring Management VRF...................................................................................................928
Configuring a Static Route......................................................................................................... 928
Sample VRF Configuration............................................................................................................... 929
Route Leaking VRFs.......................................................................................................................... 936
Dynamic Route Leaking................................................................................................................... 936
Configuring Route Leaking without Filtering Criteria................................................................936
Configuring Route Leaking with Filtering.................................................................................. 939
59 Virtual Link Trunking (VLT).......................................................................... 942
Overview........................................................................................................................................... 942
VLT on Core Switches................................................................................................................ 943
Enhanced VLT.............................................................................................................................943
VLT Terminology.............................................................................................................................. 944
Configure Virtual Link Trunking....................................................................................................... 945
Important Points to Remember................................................................................................. 945
Configuration Notes...................................................................................................................946
Primary and Secondary VLT Peers.............................................................................................949