nanog mailing list archives
Re: NAP/ISP Saturation WAS: Re: Exchanges that matter...
From: Curtis Villamizar <curtis () ans net>
Date: Fri, 20 Dec 1996 23:42:29 -0500
In message <199612201028.KAA21015 () diamond xara net>, "Alex.Bligh" writes:
Well this is the real point isn't it. Though Cisco has obviously paid an awful lot of attention to switching packets fast its host IP stack seems to be particularly bad compared to something built with a decent TCP/IP stack. If Cisco don't implement ICMP response in some sort of kernel layer below "application" layers handling other such functions the obvious question is "why not?". It must be possible to do this - just take your Netstar and downgrade the processor to a 386SX and see if it still works (fast external switching engine, slow processor).
Worked fine with an RS/6000 instead of the 586. Just generate the ICMP on the forwarding card. It has a CPU on it, so use it. The overhead of sending to the main processor, then back, then usually out the same interface is probably much higher than just building the packet and sticking it on the output ring buffer. Curtis - - - - - - - - - - - - - - - - -
Current thread:
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter..., (continued)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Michael Dillon (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Tony Li (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... David Schwartz (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Alan Hannan (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... David Schwartz (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Brett L. Hawn (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Alan Hannan (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Brett L. Hawn (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Jon Zeeff (Dec 21)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Michael Dillon (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Curtis Villamizar (Dec 20)
- DoS Attacks Robert Laughlin (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Curtis Villamizar (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... dave o'leary (Dec 22)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Matt Ranney (Dec 17)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... alex (Dec 18)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Tony Li (Dec 19)