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I cant remember for sure, but I almost think you have to use Loopback0 not 1. I could be wrong, but I've made this work before and I used Loopback0 without a problem.
SegV Exceptions are usually a software issue. Since all your routers are using the same IOS, I'm guessing that some new condition is occurring which is affecting them all. You should check for a new release of your IOS, but since you don't have smart...
For testing link speed I typically do two things. If I have internet access, I goto a speed test website like www.speedtest.net. You can also use a tool like "iperf" which you run on a machine on each end of the link. You run one as a client and one ...