In my internet router having 2 serial interfaces. Each interface connected to 2 mbps leased line . Totally 4 mpbs internet leased line we r having .One of the seial interface every 4 o 5 minutes it is getting down and then immediately after 6 seconds it is getting up.during down both interface and line getting down. what could be the problem..
If both interface and link goes down, please check the physical cbaling from your router to the modem. You can also try giving a loop from the modem towards router and check if there are any errors or drops.
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