PCAP replay on the management port can be helpful for troubleshooting issues in the lab
The tcpreplay version on the system
fmadio@fmadio100v2-228U:~$ tcpreplay -V
Warning: May need to run as root to get access to all network interfaces.
tcpreplay version: 4.3.1 (build git:v4.3.1)
Copyright 2013-2018 by Fred Klassen <tcpreplay at appneta dot com> - AppNeta
Copyright 2000-2012 by Aaron Turner <aturner at synfin dot net>
The entire Tcpreplay Suite is licensed under the GPLv3
Cache file supported: 04
Not compiled with libdnet.
Compiled against libpcap: 1.10.4
64 bit packet counters: enabled
Verbose printing via tcpdump: enabled
Packet editing: disabled
Fragroute engine: disabled
Injection method: PF_PACKET send()
Not compiled with netmap
fmadio@fmadio100v2-228U:~$
To replay a static PCAP on the man10 interface
cat /mnt/store0/tmp2/test.pcap | sudo tcpreplay -i man10 --stats=1 -The example output looks similar to below, example file was replayed at around 550Mbps
fmadio@fmadio100v2-228U:/mnt/store0/tmp2$ cat /mnt/store0/tmp2/vxlan2.pcap | sudo tcpreplay -i man10 -
Warning: - was captured using a snaplen of 16384 bytes. This may mean you have truncated packets.
Warning: Unable to send packet: Error with PF_PACKET send() [8951]: Message too long (errno = 90)
Actual: 8950 packets (9981543 bytes) sent in 0.145007 seconds
Rated: 68834904.5 Bps, 550.67 Mbps, 61721.15 pps
Statistics for network device: man10
Successful packets: 8950
Failed packets: 1
Truncated packets: 0
Retried packets (ENOBUFS): 0
Retried packets (EAGAIN): 0
fmadio@fmadio100v2-228U:/mnt/store0/tmp2$
Replay a FMADIO Capture file on the man10 interface
sudo stream_cat opra_port0_20240728_0405 | sudo tcpreplay -i man10 --stats=1 -The output looks similar to the following
fmadio@fmadio100v2-228U:/mnt/store0/tmp2$ sudo stream_cat opra_port0_20240728_0405 | sudo tcpreplay -i man10 --stats=1 -
Warning: - was captured using a snaplen of 16384 bytes. This may mean you have truncated packets.
Test start: 2024-09-30 01:15:33.433149 ...
Actual: 583688 packets (93339006 bytes) sent in 1.00 seconds
Rated: 93333126.0 Bps, 746.66 Mbps, 583651.22 pps
Actual: 1178587 packets (178732888 bytes) sent in 2.00 seconds
Rated: 89363584.3 Bps, 714.90 Mbps, 589274.64 pps
Actual: 1773394 packets (261483666 bytes) sent in 3.00 seconds
Rated: 87159362.6 Bps, 697.27 Mbps, 591118.72 pps
Actual: 2367922 packets (343940040 bytes) sent in 4.00 seconds
Rated: 85983612.7 Bps, 687.86 Mbps, 591970.88 pps
Actual: 2951907 packets (420438034 bytes) sent in 5.00 seconds
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Replay an FMADIO Capture file on the man10 at specific Mbps
Use the following command. In the below example —mbps=10 is set to replay a 10Mbps
sudo stream_cat --cpu 40 <capture name> | sudo tcpreplay -i man10 --stats=1 --mbps=10 -Resulting output looks like
fmadio@fmadio100v2-228U:/mnt/store0/tmp2$ sudo stream_cat --cpu 40 opra_port0_20240728_0405 | sudo tcpreplay -i man10 --stats=1 --mbps=10 -
Warning: - was captured using a snaplen of 16384 bytes. This may mean you have truncated packets.
Test start: 2024-09-30 01:17:43.188774 ...
Actual: 9457 packets (1250110 bytes) sent in 1.00 seconds
Rated: 1249997.5 Bps, 9.99 Mbps, 9456.14 pps
Actual: 19036 packets (2500168 bytes) sent in 2.00 seconds
Rated: 1249999.0 Bps, 9.99 Mbps, 9517.35 pps
Actual: 27924 packets (3750216 bytes) sent in 3.00 seconds
Rated: 1249999.5 Bps, 9.99 Mbps, 9307.46 pps
Actual: 36183 packets (5000300 bytes) sent in 4.00 seconds
Rated: 1249999.6 Bps, 9.99 Mbps, 9045.20 pps
Actual: 45343 packets (6250376 bytes) sent in 5.00 seconds
Rated: 1249999.7 Bps, 9.99 Mbps, 9068.05 pps
There are a number of other useful functions tcpreplay provides, for more details see the man page