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Diffstat (limited to 'docs/gettingstarted/developers')
| -rw-r--r-- | docs/gettingstarted/developers/vnet.md | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/docs/gettingstarted/developers/vnet.md b/docs/gettingstarted/developers/vnet.md index b8f878c2cd7..826af0a90a9 100644 --- a/docs/gettingstarted/developers/vnet.md +++ b/docs/gettingstarted/developers/vnet.md @@ -470,25 +470,33 @@ This should be of significant value when developing new vpp graph nodes. If new code mispositions b->current_data, it will be completely obvious from looking at the dispatch trace in wireshark. -## pcap rx and tx tracing +## pcap rx, tx, and drop tracing -vpp also supports rx and tx packet capture in pcap format, through the -"pcap rx trace" and "pcap tx trace" debug CLI commands +vpp also supports rx, tx, and drop packet capture in pcap format, +through the "pcap trace" debug CLI command. -This command is used to start or stop a packet capture, or show -the status of packet capture. Note that both "pcap rx trace" and -"pcap tx trace" are implemented. The command syntax is identical, -simply substitute rx for tx as needed. +This command is used to start or stop a packet capture, or show the +status of packet capture. Each of "pcap trace rx", "pcap trace tx", +and "pcap trace drop" is implemented. Supply one or more of "rx", +"tx", and "drop" to enable multiple simultaneous capture types. These commands have the following optional parameters: -on|off- Used to start or stop a packet capture. +- <b>rx</b> - trace received packets. + +- <b>tx</b> - trace transmitted packets. + +- <b>drop</b> - trace dropped packets. - <b>max _nnnn_</b> - file size, number of packet captures. Once <nnnn> packets have been received, the trace buffer buffer is flushed to the indicated file. Defaults to 1000. Can only be updated if packet capture is off. +- <b>max-bytes-per-pkt _nnnn_</b> - maximum number of bytes to trace + on a per-paket basis. Must be >32 and less than 9000. Default value: + 512. + - <b>intfc _interface_ | _any_</b> - Used to specify a given interface, or use '<em>any</em>' to run packet capture on all interfaces. '<em>any</em>' is the default if not provided. Settings from a previous |