[60339] in North American Network Operators' Group
Re: Server Redundancy
daemon@ATHENA.MIT.EDU (Steve Francis)
Wed Aug 6 15:10:51 2003
Date: Wed, 06 Aug 2003 12:10:36 -0700
From: Steve Francis <steve@expertcity.com>
To: "Austad, Jay" <JAustad@temgweb.com>
Cc: 'Gerald' <gcoon@inch.com>, Jason Greenberg <jg@execulink.com>,
nanog@merit.edu
In-Reply-To: <288FAF5565A1A74EA5E35C39E7EE1D42077FE28F@mail.temgweb.com>
Errors-To: owner-nanog-outgoing@merit.edu
Austad, Jay wrote:
>>We all hedged bets that Cisco was going to absorb the CSS and
>>just make it
>>a software feature on the Catalyst switches. I haven't heard of that
>>actually happening yet though.
>>
>>
>
>If they did that, how would they sell the CSS hardware? :)
>
>I would think that the closest you are going to get to that is the CSS blade
>for the Cat 6500's. Although, wasn't there a version of code for the 6500's
>that had some local director features in it awhile back? Or did you
>actually need a local director blade?
>
>-jay
>
>
Cat6500's in native mode support IOS sever load balancing, which is like
a not quite as intelligent version of the CSS, but does use the PFC's
hadware accelartion.
(Although for this specific application of the original poster, to
support servers on different IP subnets requires the SLB function to NAT
the client IP address as well as the server IP, to ensure return traffic
flows back through the SLB. In this mode, it cannot use the PFC
hardware switching.)
