Concept Guide
67 Virtual Router Redundancy Protocol (VRRP).......................................................................................... 1183
VRRP Overview............................................................................................................................................................ 1183
VRRP Benets...............................................................................................................................................................1184
VRRP Implementation.................................................................................................................................................. 1184
VRRP Conguration..................................................................................................................................................... 1185
Conguration Task List...........................................................................................................................................1185
Setting VRRP Initialization Delay...........................................................................................................................1194
Sample Congurations................................................................................................................................................. 1195
VRRP for an IPv4 Conguration...........................................................................................................................1195
VRRP in a VRF Conguration................................................................................................................................1198
VRRP for IPv6 Conguration................................................................................................................................1203
Proxy Gateway with VRRP......................................................................................................................................... 1207
68 Debugging and Diagnostics..................................................................................................................... 1212
Oine Diagnostics........................................................................................................................................................ 1212
Important Points to Remember.............................................................................................................................1212
Running Oine Diagnostics...................................................................................................................................1212
Trace Logs......................................................................................................................................................................1215
Auto Save on Crash or Rollover.................................................................................................................................. 1215
Last Restart Reason..................................................................................................................................................... 1215
Hardware Watchdog Timer..........................................................................................................................................1216
Using the Show Hardware Commands...................................................................................................................... 1216
Enabling Environmental Monitoring............................................................................................................................ 1217
Recognize an Overtemperature Condition.......................................................................................................... 1218
Troubleshoot an Over-temperature Condition.....................................................................................................1219
Recognize an Under-Voltage Condition............................................................................................................... 1219
Troubleshoot an Under-Voltage Condition...........................................................................................................1219
Troubleshooting Packet Loss...................................................................................................................................... 1220
Displaying Drop Counters......................................................................................................................................1220
Dataplane Statistics............................................................................................................................................... 1224
Display Stack Port Statistics.................................................................................................................................1225
Display Stack Member Counters..........................................................................................................................1225
Enabling Application Core Dumps.............................................................................................................................. 1228
Mini Core Dumps..........................................................................................................................................................1228
Enabling TCP Dumps...................................................................................................................................................1229
69 Standards Compliance............................................................................................................................1230
IEEE Compliance.......................................................................................................................................................... 1230
RFC and I-D Compliance..............................................................................................................................................1231
General Internet Protocols..................................................................................................................................... 1231
General IPv4 Protocols.......................................................................................................................................... 1233
General IPv6 Protocols.......................................................................................................................................... 1234
Border Gateway Protocol (BGP)..........................................................................................................................1235
Open Shortest Path First (OSPF)........................................................................................................................1236
Intermediate System to Intermediate System (IS-IS)........................................................................................1236
36
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