Reference Guide

61 Virtual Routing and Forwarding (VRF)........................................................1025
VRF Overview..................................................................................................................................1025
VRF Configuration Notes................................................................................................................1026
DHCP.........................................................................................................................................1029
VRF Configuration.......................................................................................................................... 1029
Enabling VRF in Configuration Mode.......................................................................................1029
Creating a Non-Default VRF.....................................................................................................1029
Assign an Interface to a VRF.....................................................................................................1030
View VRF Instance Information................................................................................................1030
Connect an OSPF Process to a VRF Instance..........................................................................1030
Configure VRRP on a VRF......................................................................................................... 1031
Sample VRF Configuration..............................................................................................................1031
Route Leaking VRFs........................................................................................................................ 1039
62 Virtual Router Redundancy Protocol (VRRP)............................................1041
VRRP Overview................................................................................................................................1041
VRRP Benefits..................................................................................................................................1042
VRRP Implementation.................................................................................................................... 1042
VRRP Configuration........................................................................................................................1043
Configuration Task List.............................................................................................................1043
Setting VRRP Initialization Delay.............................................................................................. 1052
Sample Configurations................................................................................................................... 1053
VRRP for an IPv4 Configuration............................................................................................... 1053
VRRP in a VRF Configuration.................................................................................................... 1057
63 S-Series Debugging and Diagnostics......................................................... 1063
Offline Diagnostics......................................................................................................................... 1063
Important Points to Remember............................................................................................... 1063
Running Offline Diagnostics.....................................................................................................1064
Trace Logs.......................................................................................................................................1067
Auto Save on Crash or Rollover..................................................................................................... 1067
Last Restart Reason (S4820T).........................................................................................................1067
Hardware Watchdog Timer............................................................................................................1068
Using the Show Hardware Commands......................................................................................... 1068
Enabling Environmental Monitoring.............................................................................................. 1070
Recognize an Overtemperature Condition............................................................................. 1070
Troubleshoot an Over-temperature Condition.......................................................................1070
Recognize an Under-Voltage Condition..................................................................................1071
Troubleshoot an Under-Voltage Condition.............................................................................1071
Buffer Tuning...................................................................................................................................1072
Deciding to Tune Buffers..........................................................................................................1073