[149087] in North American Network Operators' Group
Re: pontification bloat (was 10GE TOR port buffers (was Re: 10G
daemon@ATHENA.MIT.EDU (Leo Bicknell)
Fri Jan 27 21:09:03 2012
Date: Fri, 27 Jan 2012 18:08:10 -0800
From: Leo Bicknell <bicknell@ufp.org>
To: "North American Network Operators' Group" <nanog@nanog.org>
Mail-Followup-To: North American Network Operators' Group <nanog@nanog.org>
In-Reply-To: <m2pqe47guv.wl%randy@psg.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
--VbJkn9YxBvnuCH5J
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
In a message written on Sat, Jan 28, 2012 at 10:31:20AM +0900, Randy Bush w=
rote:
> (embarrassed to say, but to set an honest example, i do not believe iij
> does)
I also want to take this opportunity to say there are some cool new
features (that I have not had a chance to deploy myself) that may have
been missed if queueing wasn't your day job for the last few years.
"QoS: Time-Based Thresholds for WRED and Queue Limit for the Cisco 12000
Series Router"
http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/12stbwr.html
Don't want to do math on how big the queue should be? Configure by
ms:
outer> enable
Router# configure terminal
Router (config)# policy-map policy1
Router(config-pmap)# class class-default
Router(config-pmap-c)# bandwidth percent 80
Router(config-pmap-c)# random-detect
Router(config-pmap-c)# random-detect precedence 2 4 ms 8 ms=20
Router(config-pmap-c)# exit=20
Router(config-pmap)# exit=20
Router(config)# interface serial8/0/0:0.1000
Router(config-subif)# service-policy output policy1
Router(config-subif)# end
That's a 4ms to 8ms buffer! Handy, nice!
Another frame concept brought to IP is ECN, congestion notification.
http://www.cisco.com/en/US/docs/ios-xml/ios/qos_conavd/configuration/15-0m/=
qos-conavd-wred-ecn.html
Router(config)# policy-map pol1
Router(config-pmap)# class class-default
Router(config-pmap-c)# bandwidth per 70
Router(config-pmap-c)# random-detect
Router(config-pmap-c)# random-detect ecn
Requires other bits in the network to be ECN aware, but if they are,
good stuff.
--=20
Leo Bicknell - bicknell@ufp.org - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/
--VbJkn9YxBvnuCH5J
Content-Type: application/pgp-signature
Content-Disposition: inline
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.18 (FreeBSD)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=wEGl
-----END PGP SIGNATURE-----
--VbJkn9YxBvnuCH5J--
