I using a 2800 router connected to LOOP-E1500 modem and ASA 5510 firewall on 2M leased line. I experiences sometime the connection to internet is very slow. Normally, it tooks less than 5secs to load a google home page but out of sudden, it may take up more than a minute to load the same page.
Then, when i experience the slowness again, i logged into my ISP MRTG graph monitoring system and saw that the leased line Bandwidth has utilised 100%. Also i noticed that the COL led on LOOP-E modem is blinking too. Therefore, after i have resetted the router and modem, everything's back to normal.
Any advise on why is that so? could it be an attack or some buffer leaks?
Thanks in advance.