i'm currently using a Cisco 7206 NPE-G2 with a PA-A3 to terminate DSL customers. i have 6 VP configured with many VC's inside, one for each customer. I used the "atm pvp" configuration specifying the PCR with values given by our ISP. So all the VC's are UBR without particular parameters. We have also a contractualized SCR with the ISP on every VP.
On two of that VP's i have a strange problem: their traffic is well below half of the PCR (even below SCR) and customer reports that their DSL is very slow. If i change the PCR value, for example 3/4 or less of the total PCR the traffic increase and the customers benefit from it. When i put back to real PCR the traffic drops and stay low.
What's the issue with that? The ISP says that everything is ok by their side.
The problem is exactly the opposite: one of that VP has a contractualized PCR of 30Mbit and 27Mbit of SCR. If i configure PVP with 30Mbit on the 7200 the traffic stays on 12-13Mbit and the dsl customers reports slowness on their connection. If i lower the PCR to, for example, 16Mbit, the traffic immediately go up from 12Mbit to 16 and stays there. If then i raise it to 20, it starts to drop again, maybe to 10Mbit then slowly return to 12-13. I'm figuring out if it's a PA-A3 issue (i have 3100 VC on 4096 max, with some VP with very large amount of customers) or it's a provider issue or simply a mismatch between policies. Is there any method to shape single VC's even with PVP configuration?
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