[26783] in North American Network Operators' Group
Re: CEF Load balancing...
daemon@ATHENA.MIT.EDU (Daniel Golding)
Sun Jan 16 13:17:01 2000
Date: Sun, 16 Jan 2000 13:12:36 -0500 (EST)
From: Daniel Golding <dgolding@mindspring.net>
To: Alex Rubenstein <alex@nac.net>
Cc: nanog@merit.edu
In-Reply-To: <Pine.WNT.4.05.10001142338420.1456-100000@SHAKALAKA>
Message-ID: <Pine.LNX.3.96.1000116130700.19264C-100000@mulder.mindspring.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Errors-To: owner-nanog-outgoing@merit.edu
CEF is safe to a point. We're running it on 11.1CC(30), and it runs pretty
well. We had memory leak problems in earlier versions on the 11.1CC train.
I wouldn't use it for IMUXing, though. Check out Tiara Networks for their
MLPPP engine. It's pretty nifty.
CEF does a nice job of bringing the CPU down on a fully loaded 7513.
That's all i'd use it for, until all the bugs get worked out. I had a bad
experience using CEF on 12.0.5 in the type of situation you are
describing. If a serial flapped, there was a small chance that the router
CPU would go nuts, effectively making the router unmanageable.
On a related note - Any ISPs out there using 12.0(s) yet in widespread
release?
--------------------------------------------------------------
Daniel L. Golding * Senior Network Engineer
Network Engineering * Mindspring Enterprises
dgolding@mindspring.net *
--------------------------------------------------------------
On Fri, 14 Jan 2000, Alex Rubenstein wrote:
>
>
> Question (kinda operational)..
>
> I've been looking/asking around, but have yet been able to get the same
> answer twice to the following question: How many links can you have in
> parallel when using CEF load-sharing per-packet?
>
> Another words, we currently have a site that has four DS1s load balanced,
> in parallel (terminating in the same router on each end). Can you add a
> [5th|6th|7th|8th] ?
>
> Before you answer "BUY A DS3!", this is located in a rural area that a)
> really doesn't (easily) even have DS3 capabilites, and b) isn't cost
> effective to have a DS3 as it is about 15 times the cost of a DS1.
>
> Thanks for any insight!
>
>
>
>
