Information About Maintenance Function: BGP Routing Protocol
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BGP Event Trace creates buffers for peer connection state change and updates event logging. The size of the buffer is 100,000, which means 100,000 trace entries will be stored at a time. The buffer can be resized by using configuration command and maximum size of the buffer can be extended till 1,000,000.
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These buffers are circular in nature, that is, if the buffer reaches the end then it starts logging from the beginning. If "one-shot" is not configured, it continuously logs from the beginning.
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Considering the contribution is a small addition to performance, BGP event trace will be disabled by default. It can be enabled by executing the enable command in EXEC mode.
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BGP Event Traces: -
Neighbor: All the peer events such as state changes, error handling, unrecognized/malformed packet handling will be captured into this buffer.
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BGP logs the traces in binary format into corresponding buffers on runtime, which helps in logging the trace efficiently. Use the monitor event-trace bgp neighbor command to print the traces in human-readable format on the console. This command provides the functionality of dumping the event traces into the file in binary or human-readable format as well.
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The show commands are provided with afi/safi/vrf/neighbor address filtering options to display the event logs. Event Trace logging under different afi/safi/vrf is completely based on the different traces.