T1 Troubleshooting
You can really load down a T1 connection for testing by sending big pings across the wire.
The biggest ping packet I could send on my Win2K pro machine was 17799 so it was:
ping -t -l 17799 [ip dest]
I opened up about 20 of these in separate windows and pegged the line to near capacity.
During this I telenet to routers on both ends and watch the interface stats. For example,
show int s0
to watch for increasing input errors/etc.
http://www.cisco.com/univercd/cc/td/doc/cisintwk/itg_v1/tr1915.htm Cisco "Troubleshooting Serial Connections" a great document.
From this document is a section on doing extended ping testing from a Cisco router on one end in various loopback states. It shows how to use the cisco ping extended commands to send a pattern of all zeros and all ones repeated 2000 times or more.
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