[c-nsp] Re: [j-nsp] load balancing between multiple BGP links

[Oliver Boehmer (oboehmer)]

Alok <> wrote on Wednesday, September 14, 2005 3:42 PM:


> Perhaps "per packet" with BGP link bandwidth would be good infact  i
> think.. .
> or perhaps for flow based, flow setup based on "actual util at the
> time of setup".... though nothing still seems to beat per packet :-)
> with link bandwidth i guess...

I think we're past using the current link utilization for any routing protocol metrics calculation. (E)IGRP has this option (disabled by default), but it caused many issues with oszillating traffic/etc, as far as I recall.

There is OER (for enterprise networks) which tries to do some form of load-sharing, but this doesn't scale to be used in ISP networks.

	oli

> ----- Original Message -----
> From: "Rafal Szarecki (WA/EPO)" <rafal.szarecki at ericsson.com>
> To: "Alok" <alokdube at hotpop.com>
> Sent: Wednesday, September 14, 2005 7:01 PM
> Subject: RE: [j-nsp] load balancing between multiple BGP links
> 
> 
> Alok,
> 
>> 
>> EBGP multihop between them over 2 links
>> link 1 =10Mbps
>> link 2 = 20 Mbps
>> 
>> total traffic = 25Mbps
> 
> Perpetum mobile? Or statistics inacuracy.
> 
>> Is there a way to ensure that link 1 doesnt get choked?
> 
> - Bgp multipath is simpler to run.
> - Is it Juniper? If the pleas check forwarding option to identyfy
> loadbalancing hash alghoritm.
> http://www.juniper.net/techpubs/software/junos/junos73/swconfig73-policy/html/policy-actions-config13.html#1021911
> 
> Rafa³ Szarecki JNCIE
> 
> skype me <callto://Rafal_Szarecki/>
> 
> 
> 
> 
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