topic Re: Equal-Cost Multi-Path routing in linux in Operating System - Linux

Equal-Cost Multi-Path routing in linux

koteswar — Wed, 15 Apr 2009 05:22:02 GMT

Do you know how to enable ECMP routing in linux? How it will work? How to configure it? How ospf and rip will exchange ecmp routes?

Re: Equal-Cost Multi-Path routing in linux

Taifur — Wed, 15 Apr 2009 10:22:50 GMT

Hi Koteswar,

ZebrÐ° ospfd is cÐ°pÐ°ble of ECMP Ð°s well; isisd is not yet cÐ°pÐ°ble of ECMP. Including ECMP support hÐ°s to be decided Ð°t compile time (configure --enÐ°ble-multipÐ°th=6). It is highly recommended that you reÐ°d the ECMP RFCs (RFC 2991 and RFC 2992) for Ð° better grÐ°sp of this delicÐ°te mÐ°tter.

Keep in mind that loÐ°d bÐ°lÐ°ncing is done only on outbound trÐ°ffic; be Ð°ware of whÐ°t reÐ°lly resembles Ð° flow when testing your setup, so Ð°s not to misjudge the behÐ°vior of Ð° correct configurÐ°tion! ExÐ°mple 9-23 shows Ð°n exÐ°mple combinÐ°tion of the ECMP-cÐ°pÐ°ble Linux kernel and the ZebrÐ° ospfd.

ExÐ°mple 9-23. Linux ECMP in Action

[root@cÐ°llisto:~#] ip route

192.168.201.2 viÐ° 192.168.14.254 dev eth0 proto zebrÐ° metric 11 equÐ°lize

192.168.17.0/29 viÐ° 192.168.14.254 dev eth0 proto zebrÐ° metric 16 equÐ°lize

192.168.13.0/29 viÐ° 192.168.14.254 dev eth0 proto zebrÐ° metric 16 equÐ°lize

For details regarding ECMP follow below link,
http://etutorials.org/Networking/Integrated+cisco+and+unix+network+architectures/Chapter+9.+Dynamic+Routing+Protocols-Interior+Gateway+Protocols/ECMP-Manipulating+Metric+and+Distance/

Rgds//
Taifur

Re: Equal-Cost Multi-Path routing in linux

Huc_1 — Wed, 15 Apr 2009 11:32:16 GMT

Taifur, You answer is not readable, by.. I would guess most of us, I try to set my web browser to all sorts of encoding, but still can not read you ?

is it possible for you to post utf-8!

what ever, enjoy life.

no points for this, please Thank!

Jean-Pierre Huc

Re: Equal-Cost Multi-Path routing in linux

koteswar — Fri, 17 Apr 2009 03:54:14 GMT

Ya I am also unable to read your reply.

Regards
Koteswar