Re: BGP Multihoming 2 providers full or partial?

[Faisal Imtiaz <faisal () snappytelecom net>]

If you wish to do outbound traffic engineering, and want to take advantage of best paths to different networks 
(outbound), then you have to take full routes.

Or putting it  another way.... Taking full routes offers the most flexibility, anything else would be a compromise (an 
acceptable compromise) to overcome some existing resource limitations...  

Regards.

Faisal Imtiaz
Snappy Internet & Telecom
7266 SW 48 Street
Miami, FL 33155
Tel: 305 663 5518 x 232

Help-desk: (305)663-5518 Option 2 or Email: Support () Snappytelecom net 

----- Original Message -----
> From: "Maqbool Hashim" <maqbool () madbull info>
> To: nanog () nanog org
> Sent: Friday, May 29, 2015 4:36:34 AM
> Subject: BGP Multihoming 2 providers full or partial?
>
> Hi,
>
>
> We are an enterprise that are eBGP multihoming to two ISPs. We wish to load
> balance in inbound and outbound traffic thereby using our capacity as
> efficiently as possible. My current feeling is that it would be crazy for us
> to take a full Internet routing table from either ISP. I have read this
> document from NANOG presentations:
>
>
> https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCoQFjAA&url=https%3A%2F%2Fwww.nanog.org%2Fmeetings%2Fnanog41%2Fpresentations%2FBGPMultihoming.pdf&ei=cyRnVb--FeWY7gbq4oHoAQ&usg=AFQjCNFsMx3NZ0Vn4bJ5zJpzFz3senbaqg&bvm=bv.93990622,d.ZGU
>
>
> The above document reenforces my opinion that we do not need full routing
> tables. However I was seeking some clarity as there are other documents
> which suggest taking a full routing table would be optimal. I "guess" it
> depends on our criteria and requirements for load balancing:
>
>
> - Just care about roughly balancing link utilisation
>
> - Be nice to make some cost savings
>
>
> We have PI space and two Internet routers one for each ISP. Either of our
> links is sufficient to carry all our traffic, but we want to try and balance
> utilisation to remain within our commits if possible. I am thinking a
> "rough" approach for us would be:
>
>
> - Take partial (customer) routes from both providers
>
> - Take defaults from both and pref one
>
>
> Maybe we can refine the above a bit more, any suggestions would be most
> welcome!
>
>
> Many Thanks