If you see, interface up/line protocol down, most common cause is
encapsulation mismatch or clocking problem.
With serial it is usually clocking and DCE/DTE issue.
You should duble check that and also the interface
statistics.
Nadeem
==
dr_sukhi wrote
Respected Seniors and Friends in the
Thanks Nadeem, one thing more, when the serial interface goes down, the LED
hangs, i.e. even when I remove the serial cable does the LED keep glowing.
Only when I restart the router does the LED status come to actual. Can you
add to this? I'll tell you the end results of this case, keep checking
Respected Seniors and Friends in the group,
In Cisco 2620 router, I have configured 2 WIC-A/S cards for three 64k leased
lines. All worked until all stopped working suddenly. Other ports, ISDN etc.
are fine. Serial lines show LINE PROTOCOL DOWN. When I reboot the router one
card starts working,
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