Setup Guide
61 Virtual LANs (VLANs)............................................................................................................................. 1055
Default VLAN................................................................................................................................................................1056
Port-Based VLANs...................................................................................................................................................... 1056
VLANs and Port Tagging............................................................................................................................................. 1057
Conguration Task List................................................................................................................................................ 1057
Creating a Port-Based VLAN................................................................................................................................1057
Assigning Interfaces to a VLAN............................................................................................................................1058
Moving Untagged Interfaces................................................................................................................................1059
Assigning an IP Address to a VLAN.....................................................................................................................1060
Conguring Native VLANs..........................................................................................................................................1060
Enabling Null VLAN as the Default VLAN..................................................................................................................1061
62 Virtual Link Trunking (VLT).....................................................................................................................1062
Overview.......................................................................................................................................................................1062
VLT Terminology.....................................................................................................................................................1065
Layer-2 Trac in VLT Domains.............................................................................................................................1066
Interspersed VLANs............................................................................................................................................... 1067
VLT on Core Switches........................................................................................................................................... 1067
Enhanced VLT........................................................................................................................................................ 1068
Congure Virtual Link Trunking.................................................................................................................................. 1069
Important Points to Remember............................................................................................................................1069
Conguration Notes...............................................................................................................................................1070
Primary and Secondary VLT Peers.......................................................................................................................1073
RSTP and VLT.........................................................................................................................................................1074
VLT Bandwidth Monitoring....................................................................................................................................1074
VLT and Stacking....................................................................................................................................................1074
VLT and IGMP Snooping....................................................................................................................................... 1074
VLT IPv6.................................................................................................................................................................. 1075
VLT Port Delayed Restoration...............................................................................................................................1075
PIM-Sparse Mode Support on VLT......................................................................................................................1075
VLT Routing ............................................................................................................................................................1077
Non-VLT ARP Sync................................................................................................................................................1080
RSTP Conguration......................................................................................................................................................1081
Preventing Forwarding Loops in a VLT Domain.................................................................................................. 1081
Sample RSTP conguration...................................................................................................................................1081
Conguring VLT......................................................................................................................................................1082
PVST+ Conguration................................................................................................................................................... 1092
Sample PVST+ Conguration............................................................................................................................... 1093
Peer Routing Conguration Example.........................................................................................................................1093
Dell-1 Switch Conguration...................................................................................................................................1094
Dell-2 Switch Conguration..................................................................................................................................1098
R1 Conguration.......................................................................................................................................................1101
Access Switch A1 Congurations and Verication..............................................................................................1102
eVLT Conguration Example....................................................................................................................................... 1103
eVLT Conguration Step Examples...................................................................................................................... 1103
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