We're experiencing some strange interface behavior on two 3G connection on the same 1841 router. The cellular interfaces go into reset exactly two minutes after it came and this repeats continously. See below output when we are doing a ping over that interface.
We've already updated the firmware of the cellular modems but to no change in results, now we have absolutely no idea what the cause of this may be.. :S
Router is running 15.3 (M4) I believe.
router#ping 126.96.36.199 repeat 1000000
Type escape sequence to abort.
Sending 1000000, 100-byte ICMP Echos to 188.8.131.52, timeout is 2 seconds:
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