A quick and simple tool for link bandwidth testing (aka Throughput Testing) is included in many flavours of Cisco's IOS. Although it is hidden and officially unsupported, it is documented and functional.
By running 'ttcp' from the command line in privileged mode on two different routers, one can test links between the routers.
Cisco documents the tool with Document 10340, Using Test TCP (TTCP) to Test Throughput. Continue reading "TTCP: Test TCP" »