Proxy Gateway in VLT Domains.......................................................................................................869LLDP organizational TLV for proxy gateway.............................................................................. 871Sample Configuration Scenario for VLT Proxy Gateway...........................................................872Configuring an LLDP VLT Proxy Gateway....................................................................................... 87454 Virtual Router Redundancy Protocol (VRRP)..............................................875VRRP Overview..................................................................................................................................875VRRP Benefits....................................................................................................................................876VRRP Implementation.......................................................................................................................876VRRP Configuration.......................................................................................................................... 877Configuration Task List............................................................................................................... 877Setting VRRP Initialization Delay................................................................................................ 885Sample Configurations.....................................................................................................................886VRRP for an IPv4 Configuration................................................................................................. 886VRRP in a VRF Configuration...................................................................................................... 89155 Z-Series Debugging and Diagnostics............................................................897Offline Diagnostics........................................................................................................................... 897Important Points to Remember................................................................................................. 897Running Offline Diagnostics...................................................................................................... 898TRACE Logs...................................................................................................................................... 902Auto Save on Crash or Rollover................................................................................................. 902Last Restart Reason.......................................................................................................................... 902Line Card Restart Causes and Reasons......................................................................................902Hardware Watchdog Timer..............................................................................................................902show hardware Commands.............................................................................................................903Environmental Monitoring............................................................................................................... 905Example of the show interfaces transceiver Command........................................................... 905Recognize an Over-Temperature Condition............................................................................ 905Troubleshoot an Over-Temperature Condition....................................................................... 906Recognize an Under-Voltage Condition................................................................................... 906Troubleshoot an Under-Voltage Condition.............................................................................. 906Buffer Tuning.................................................................................................................................... 907Buffer Tuning Points...................................................................................................................909Decide to Tune Buffers...............................................................................................................909Using the Buffer Tuning Commands......................................................................................... 909Sample Buffer Profile Configuration...........................................................................................912Troubleshooting Packet Loss........................................................................................................... 912Displaying Drop Counters...........................................................................................................913Displaying Dataplane Statistics................................................................................................... 913Displaying Stack Member Counters........................................................................................... 915Enabling Application Core Dumps................................................................................................... 915
