Hi Matt, I have the dumbest question of the day. Currently I am working with an MPLS carrier who supports our internal network. On one of their routers we see constant packet drops, which they say is related to their COS settings. Their router is a 2821, running on 12.4(25D). They use DSCP for packet shaping. There is one default queue, a management queue of theirs, a AF31 queue where we have an ACL defined, and a tail queue. The AF31 is set to 1 Meg on a 4 Meg line. The management queue is set to 8 K. Their class-map class-default (match any) has a bandwith statement set to 360 K. We are seeing packets dropped like crazy, approximately 100.000 per day, without the line being overutilised. Now the telco claims this is because we are overutilising the default class, as we are sending more than 360 K over the line. I think this is a ridiculous statement, as we have a 4 Meg line for a reason. Now here's the question: When using DSCP to shape the line, shouldn't this only kick in when we reach the maximum line bandwith? In other words, shaping should never be a reason packets are dropped, when you are not using the full capacity of the line, and this issue is independant of what class of traffic we are using the line for, right? Thanks
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Hi, I've been struggling with this for more than a month now and cannot find the solution. Any help would be much appreciated. The following setup works perfectly and with these specs± ISP_MODEM => PC IP 80.57.X.167/24 DG 80.57.X.1 DNS 213.46.X.196 & 62.179.X.196 DHCP 10.15.X.1 However, when I try this setup, I get the following: ISP_MODEM => 1721 => LAN With the 1721 configured as follows: interface FastEthernet0[ ip address dhcp ip dhcp relay information trusted speed auto full-duplex ] no ip bootp server no ip dhcp-client broadcast-flag Result: FastEthernet0 10.15.X.22 YES DHCP up up ip name-server 212.142.X.13 Here, the IP of the ext. interface is assigned an IP in the same subnet as the actual ISP DHCP-server. The name server is completely different from what they are supposed to supply (checked with others with the same ISP just to be sure). Any domain lookup, regardless of actual domain name, allways gives the same result. I even tried it with a netgear AP (allthough it was ment for my internal WLAN only), but the AP is not able to get any outside connectivity when configured for this purpose (but no CLI so no troubleshooting). The modem of the ISP is not configurable. I tried contacting the ISP, but offcourse the helpdesk guys simply state that if I have an outside connection through my PC their service is excellent. My best guess is that somehow they see my router as something from their internal network and give me alot of privileges I shouldnt get and dont want! But I cant put my finger around why, and how to solve this. I tried having the router spoof my PC's MAC, but to no avail. Am I doing something terribly wrong here?
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