North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: CAR
On Thu, 18 Apr 2002, Ken Yeo wrote: > > Hi Nanog, > > Scenario: > > Transits -----(router A)Backbone(router B)----- Customers > > We applied Cisco CAR at the edge routers (B) in the Backbone to rate limit > inbound and outbound traffics to/from Customers. If transmission rate is > higher than the rate limit threshold, IP packets are being dropped by router > B. How do we prevent the excess IP packets to consume the transit links and > the Backbone? Here is my understanding: You can't unless you CAR on all ingress interfaces on your network toward the customers... so: Ingress-Provider->RTA->RTBB->RTB->Customers You need to CAR on all 'Ingress-Provider' links, this is a very sticky problem (obviously) > > -For TCP traffics (HTTP, FTP), TCP senders will stop sending packets when > the TCP windows threshold is reached. > -For UDP based audio/video trafffics, if the applications use RTSP and > H.323, RTCP/H.245 will signal the sender to slowdown the transmission if the > receiver lost packets. > > Did I miss anything? How about UDP traffics that are not using RTSP/H.323? > > Thanks. > > Suan "Ken" Yeo > Network Engineer > Aurum Technology > [email protected] >
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