I’ve got a weird problem when troubleshooting dedicated internet connection in Parigi, east Indonesia. Physical layer connected already but there were no internet connection even all devices configured properly on PE Router, Catalyst Switch, DSLAM and modem.
How to solve this problem ? I’ve three (3) ways to overcome this crazy problem :
- First of all, I have to change the port on DSLAM and make some reconfiguration on it such as creating PVC, configuring vlan, etc. Test the system and go for internet connection
- Second, make some preparation for testing access performance. We are using SNR and attenuation value that displayed by modem and DSLAM and also using networking tester for testing access performance names TOOLGRADE.
- Third, checking the bad traffic on PE router that originate from customer. In this part, I see a virus that holding network performance. Just running IP cache flow on PE router and you will see it, e.g :
PE Router#sh ip ca fl | i 1/3.821
Gi1/3.821 x.x.x.x Null y.y.y.a 06 12BF 01BD 1
Gi1/3.821 x.x.x.x Null y.y.y.w 06 12BE 01BD 1
Gi1/3.821 x.x.x.x Null y.y.r.w 06 12B7 01BD 2
Gi1/3.821 x.x.x.x Null y.y.w.e 06 12B6 01BD 2
Gi1/3.821 x.x.x.x Null y.r.r.s 06 12BD 01BD 1
Gi1/3.821 x.x.x.x Null y.s.s.r 12BC 01BD 1
Note : x.x.x.x : source address, y.y.y.a : destination address, 01BD : indicated that virus found on customer networking
By doing this ways, hopefully it will solve the problem so customer can use their internet connection as usual.
