As anyone come across issues where a serial connection (say s0/1) going down, tend to bring down another serial connection.
The scenerio is that, say RouterA has 2 serial interfaces s0/1 and s0/2. s0/1 is a ppp connection via a V100 satellite link, and s0/2 is a frame-relay connection with several subinterfaces ... Say s0/2.1,s0/2.2,s0/2.3,s0/2.4,s0/2.5 etc.
The problem is, whenever s0/1 goes down, it takes s0/2 main interface down with it, which in turn take down all the sub-interfaces with it.
Is there any reason why this should be, I'm guessing hardware related fault on the Hub Router, or a software bug ... Anyone come across this, please let me know.
Some additional information would be helpful. What platform is this running on? Are both serial interfaces on the same card (from the interface addressing I would assume so)? What kind of card is it? Does it happen all the time that if serial0/1 goes down that serial0/2 also goes down or is it sometimes?
Thank you for the additional information. I find it very unusual that the second interface always goes down if the first one goes down, especially for reasons such as weather affecting satellite. If serial0/2 goes down does it take down serial0/1?
I would be inclined to open a case with TAC if there is a maintenance contract on this router. If a TAC case is not possible I would try upgrading the software on the possibility that it might be a software issue.
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