We have this 2600 router and 512 K ISP bandwidth...running a c2600-i-mz.121-19.bin train.
For the past month we have been having high input rate on our serial port dispropotionate to the Tx rate Serial is sometimes Rx 250/255 and Tx 30/255
Considering the recent splurge of worms all our LAN systems are patched and infact behind a firewall which denies outgoing ICMP packets (taking care of nachi welchia ) so even if there is an infected PC...it never saturates or hits the router.
What could be the reasons for high input rate on serial port when the output rate is meagre...the LAN nodes=150 number and do usual internet transactions
what could be happening ??time for forensics???
regards and thanks