I'm working for an ISP. Since our clients often ask for testing performance on dsl and sdh links in the mpls cloud and I didn't found a method at work except IP SLAs udp jitter operation -which is quite useful, but not realistic-, I started using ttcp.
It only works on the CE -> PE uplink as it seems not to support vrf.
It could also work from a backbone router which imports loopback ip management addresses through bgp from every client for the backbone -> CE downlink.
There's not enough information on ttcp online, as it's a Cisco undocumented command. (You can read some info on http://www.netcordia.com/tnm/tnm31/ttcp.htm)
Can anyone provide the following?
i. command syntax,
ii. options (maybe vrf?),
iii. description on how it works,
iv. other ios built-in performance test method.
buflen is buffer lenght
nbuf in buffer number
port is port
The other options are not clear.
Seattle#ttcp
transmit or receive [receive]:
buflen [8192]:
bufalign [16384]:
bufoffset [0]:
port [5001]:
sinkmode [y]:
rcvwndsize [2144]: 4096
show tcp information at end [n]:
ttcp-r: buflen=8192, nbuf=2048, align=16384/0, port=5001, rcvwndsize=4096 tcp
Tokyo#ttcp
transmit or receive [receive]: trans
Target IP address: 137.112.32.66
buflen [8192]:
nbuf [2048]: 50
bufalign [16384]:
bufoffset [0]:
port [5001]:
sinkmode [y]:
buffering on writes [y]:
show tcp information at end [n]:
ttcp-t: buflen=8192, nbuf=50, align=16384/0, port=5001 tcp -> 137.112.32.66
