Reference Guide

VLT on Core Switches.................................................................................................................................... 842
Enhanced VLT.................................................................................................................................................842
VLT Terminology................................................................................................................................................... 843
Configure Virtual Link Trunking............................................................................................................................ 844
Important Points to Remember...................................................................................................................... 844
Configuration Notes....................................................................................................................................... 845
Primary and Secondary VLT Peers................................................................................................................ 848
RSTP and VLT.................................................................................................................................................848
VLT Bandwidth Monitoring.............................................................................................................................849
VLT and Stacking............................................................................................................................................849
VLT and IGMP Snooping................................................................................................................................ 849
VLT IPv6..........................................................................................................................................................849
VLT Port Delayed Restoration........................................................................................................................ 850
PIM-Sparse Mode Support on VLT................................................................................................................ 850
VLT Routing ................................................................................................................................................... 852
Non-VLT ARP Sync.........................................................................................................................................854
RSTP Configuration...............................................................................................................................................854
Preventing Forwarding Loops in a VLT Domain............................................................................................. 854
Sample RSTP Configuration........................................................................................................................... 855
Configuring VLT.............................................................................................................................................. 855
eVLT Configuration Example.................................................................................................................................865
eVLT Configuration Step Examples................................................................................................................ 865
PIM-Sparse Mode Configuration Example...........................................................................................................867
Verifying a VLT Configuration............................................................................................................................... 868
Additional VLT Sample Configurations................................................................................................................. 871
Configuring Virtual Link Trunking (VLT Peer 1)Configuring Virtual Link Trunking (VLT Peer 2)Verifying a
Port-Channel Connection to a VLT Domain (From an Attached Access Switch)...........................................871
Troubleshooting VLT.............................................................................................................................................873
Reconfiguring Stacked Switches as VLT..............................................................................................................875
57 Virtual Router Redundancy Protocol (VRRP)....................................................................877
VRRP Overview.....................................................................................................................................................877
VRRP Benefits.......................................................................................................................................................878
VRRP Implementation........................................................................................................................................... 878
VRRP Configuration.............................................................................................................................................. 879
Configuration Task List...................................................................................................................................879
Setting VRRP Initialization Delay....................................................................................................................887
Sample Configurations..........................................................................................................................................887
VRRP for an IPv4 Configuration......................................................................................................................887
VRRP in a VRF Configuration..........................................................................................................................892
58 S-Series Debugging and Diagnostics................................................................................897