North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Traffic Shapping
Traffic shaping in the core of a network won't scale. "enterprise" or private networks haven't got much life left in them. (This is Nanog right?) We use 2500 series ciscos for traffic shaping at T-1 and below, but that isn't terribly related to nanog either. One just has to look at exchange point data to see what traffic volumes are like, I don't know of anything that can switch VC near 2gbps/sec particuarlly with the flow life times of Internet traffic. It's much cheaper to shape/filter at the borders and overengineer the core. It also increases usefull lifetime of hardware. (No forklift upgrades). In message <[email protected]>, "Ehab Hadi" writes: >I think traffic shaping is very importent. I agree to the point >that the new traffic shaping approches tends to shape on near the >edges, but that would not prevent applying such approches in the >core especially if its an interprise net. >The shapping implemintation preferred to be implemented in switch >because the hardware is simply fast and efficient. >Jeremy, >Would you please specify what kind of Cisco platform that you are >using? > >Ehab Hadi >Northern Telecom. >Interprise Networking >Ottawa, Ontario K1Y 4H7 >Canada > > >>From [email protected] Fri Apr 24 09:39:40 1998 >>Received: from localhost ([email protected]) >> by merit.edu (8.8.7/8.8.5) with SMTP id MAA26391; >> Fri, 24 Apr 1998 12:27:05 -0400 (EDT) >>Received: by merit.edu (bulk_mailer v1.5); Fri, 24 Apr 1998 12:25:12 >-0400 >>Received: (from [email protected]) >> by merit.edu (8.8.7/8.8.5) id MAA26259 >> for nanog-outgoing; Fri, 24 Apr 1998 12:25:11 -0400 (EDT) >>Received: from freeside.fc.net (freeside.fc.net [207.170.70.2]) >> by merit.edu (8.8.7/8.8.5) with ESMTP id MAA26217 >> for <[email protected]>; Fri, 24 Apr 1998 12:24:37 -0400 (EDT) >>Received: from freeside.fc.net (localhost.fc.net [127.0.0.1]) >> by freeside.fc.net (8.8.8/8.8.8) with ESMTP id LAA14282; >> Fri, 24 Apr 1998 11:24:30 -0500 (CDT) >>Message-Id: <[email protected]> >>To: "Natambu Obleton" <[email protected]> >>cc: [email protected] >>Subject: Re: Traffic Shapping >>In-reply-to: Your message of "Thu, 23 Apr 1998 17:51:16 MDT." >> <[email protected]> >>Date: Fri, 24 Apr 1998 11:24:29 -0500 >>From: Jeremy Porter <[email protected]> >>Sender: [email protected] >> >> >>Sure we do it all the time. There are CPU limitations on the >>amount of total traffic that can be pushed through a router that >>is traffic shaping. I'm assuming because all the shaped traffic is >>process switched. Also you will probably want to dedicate a router >>to it. >> >>Typically these are only useful near the customer connection, as >>you can really only shape outbound packets. (unless you >>traffic shape at your boarders, and have a "large" network, you've >>already paid for the traffic by the time you discard it.) >> >>In message <[email protected]>, >"Natambu Oble >>ton" writes: >>>Has anyone here successfully implement the traffic shaping option on a >Cisco >>>router? >>>-- >>>Natambu Obleton - Network Administrator - Frontier Internet Inc. >>>970 385 4177 - fax: 970 385 6745 - http://www.frontier.net >>>777 Main St. - Suite #201 - Durango - Colorado - 81301 - USA >>> >>> >> >>--- >>Jeremy Porter, Freeside Communications, Inc. [email protected] >>PO BOX 80315 Austin, Tx 78708 | 512-458-9810 >>http://www.fc.net >> > > >______________________________________________________ >Get Your Private, Free Email at http://www.hotmail.com > --- Jeremy Porter, Freeside Communications, Inc. [email protected] PO BOX 80315 Austin, Tx 78708 | 512-458-9810 http://www.fc.net
|