Concept Guide

61 Virtual Router Redundancy Protocol (VRRP)..........................................................................................1044
VRRP Overview........................................................................................................................................................... 1044
VRRP Benets..............................................................................................................................................................1045
VRRP Implementation................................................................................................................................................. 1045
VRRP Conguration.....................................................................................................................................................1046
Conguration Task List.......................................................................................................................................... 1046
Setting VRRP Initialization Delay..........................................................................................................................1055
Sample Congurations................................................................................................................................................ 1056
VRRP for an IPv4 Conguration.......................................................................................................................... 1056
VRRP in a VRF Conguration...............................................................................................................................1059
VRRP for IPv6 Conguration................................................................................................................................1064
Proxy Gateway with VRRP......................................................................................................................................... 1068
62 Debugging and Diagnostics.....................................................................................................................1073
Oine Diagnostics........................................................................................................................................................1073
Important Points to Remember............................................................................................................................ 1073
Running Oine Diagnostics.................................................................................................................................. 1073
Trace Logs..................................................................................................................................................................... 1074
Auto Save on Crash or Rollover..................................................................................................................................1074
Last Restart Reason.....................................................................................................................................................1074
Hardware Watchdog Timer......................................................................................................................................... 1075
Using the Show Hardware Commands..................................................................................................................... 1075
Enabling Environmental Monitoring............................................................................................................................1076
Recognize an Overtemperature Condition.......................................................................................................... 1077
Troubleshoot an Over-temperature Condition.................................................................................................... 1078
Recognize an Under-Voltage Condition...............................................................................................................1078
Troubleshoot an Under-Voltage Condition.......................................................................................................... 1078
Troubleshooting Packet Loss...................................................................................................................................... 1079
Displaying Drop Counters...................................................................................................................................... 1079
Dataplane Statistics............................................................................................................................................... 1083
Display Stack Port Statistics.................................................................................................................................1084
Display Stack Member Counters..........................................................................................................................1084
Enabling Application Core Dumps.............................................................................................................................. 1086
Mini Core Dumps..........................................................................................................................................................1086
Enabling TCP Dumps................................................................................................................................................... 1087
63 Standards Compliance............................................................................................................................1088
IEEE Compliance.......................................................................................................................................................... 1088
RFC and I-D Compliance.............................................................................................................................................1089
General Internet Protocols....................................................................................................................................1089
General IPv4 Protocols...........................................................................................................................................1091
General IPv6 Protocols..........................................................................................................................................1092
Border Gateway Protocol (BGP)..........................................................................................................................1093
Open Shortest Path First (OSPF)........................................................................................................................1094
Intermediate System to Intermediate System (IS-IS)........................................................................................1094
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