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Vonage As end users there is very little we can do to help pinpoint where packet loss is
As end users there is very little we can do to help pinpoint where packet loss is occurring along the path. Modern Internet routers separate the control plane from the forwarding plane.
PINGs will test the robustness of the forwarding plane from end-to-end and show that there is packet loss some place along the path. The problem is determining where it is happening.
Traceroute will show the path that a packet will take by querying the control plane along the path. The problem is that most router control planes are protected against DoS attacks using some mechanism to limit ICMP packets or filter them entirely. The other problem is that the control plane uususallyputs handling ICMP requests as a very low priority task. You really want your routers handling routing updates and maintaining routing protocol peers and adjacencies before handling traceroutes.
Our only recourse is to run PINGs to show there is packet loss, run traceroute to determine the path, and then call our ISP to have them look at the interfaces along the forwarding path to determine where the drops are occurring. If it is not in their network, they need to work with their upstream provider to figure it out. I know this is suboptimal, but it is what we have to work with.
Read The Full Thread: Comcast vs. Vonage
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TerryM posted "As end users there is very little we can do to help pinpoint where packet loss is" on 03/22/2006 |
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