i posted a while back on an issue we were having where our branches intermittently dropped throughout the day. we thought we resolved the issue by changing a WAN cable however our celebration was shortlived.
every so often our IP Phones drop and our telenet application Sitcks (for a little more than 1 SEC. what we noticed is that everytime that happened there was a throttle recorded.
We are currently doing a virus scan and working with TAC but im not reaching any closer to resolving the issue.
what we have done so far
1. Secure EIGRP
2. Change WAN Cables
3. Change Router
4. Enable storm control - broadcast 20.00
5. check all switching ports to see if there were any errors
6. monitor CPU - Nothing over 25%
7. Disable Multicast -PIM - for our paging application
8. increase hold time
9. increase input queue
10. adjusted buffers with TAC assistance
no matter what the issue is still there. The throttles may happen every two days or sometimes not at all for a week and then come back again. everytime it happens, network is lost for a few seconds.
im looking for some directions into troubleshooting this issue. Should i simple connect a sniffer to the network and see what happens?
again our configs are not at all complex.
HEAD OFFCE TO BRANCH A AND B
HO = 2851-----4 3750
BRANCH A = 2811 - 3750----3550
BRANCH B = 3750
Any pointers would be greatly appreciated.
the carrier also reports no issue and we are not in a position to disagree at this time since we require proof of what is at fault.
thanks again in advance