Search this Blog

Wednesday, March 10, 2010

Cisco 1841 + HWIC-2SHDSL poor upload throughput

Has anyone had any experience with a Cisco 1841 and a HWIC-2SHDSL? The problem we are having is very very poor upload speeds on a 1Mbps/1Mbps 4 wire G.SHDSL service maxing out at ~ 10-15KBps egress. The download speed is fine up to ~ 1Mbps ingress.
The service provider claims there is no issue with the circuit, and we are now forced to focus our attention on the router/ WIC card.
There does appear to be some OAM errors incrementing very slowly(~200 over 72 hours) on ATM PVC sub-interface, but there are no CRC errors on SHDSL controller. The SHDSL seems to be connected correctly with the right line coding/ rate as per the service provider recommended settings.

One resolution to the problem is to make sure you have set the vbr-nrt on the atm pvc

interface ATM0/1/0.33
Pvc 0/33
vbr-nrt 1024 1024

Please click here to understand more about VBR-nrt VCs.

Citation - This blog post does not reflect original content from the author. Rather it summarizes content that are relevant to the topic from different sources in the web. The sources might include any online discussion boards, forums, websites and others.

No comments :

Post a Comment

/* Google Analytics begin ----------------------------------------------- */ /* Google Analytics end ----------------------------------------------- */