[afnog] Help Please - is my ISP Stripping my prepends?

[Alex Rhys-Hurn]

Dear Mark, 

Thank you for working with me, I really appreciate the input. 

My prefixes are: 
194.9.64.0/23 
194.9.64.0/24 
194.9.65.0/24 

Announced as: 
194.9.65.0/24 via Access Kenya with no prepend 
194.9.64.0/24 via ISP1 prepended 3x 
194.9.0.0/23 via Access Kenya with no prepend 

and 

194.9.64.0/24 via Safaricom with no prepend 
194.9.65.0/24 via Safaricom prepended 3x 
194.9.0.0/23 via Safaricom prepended 3x 

I should add that we only receive default route from the ISP. 

yes, as per your email, I am not seeing the expected behaviour from ISP 2 Safaricom. But now that I look again, I see paths to safaricom that are prepended (their AS 37061) being prepended 5x so my path is still shorter via my prepended path on Access Kenya. Should I just ramp up my prepending on Access Kenya? 

Alex 

----- Original Message -----

> From: "Alex Rhys-Hurn" <alex at itworx.co.ke>
> To: afnog at afnog.org
> Sent: Friday, 30 May, 2014 10:37:06 AM
> Subject: [afnog] Help Please - is my ISP Stripping my prepends?

> Hello everyone,

> This is my first post here, I hope somebody can help.

> I have a /23 which I have divided in to two /24s

> My objective is to balance (as far is as possible) traffic across two ISP
> links using filters with prepend.

> I have announced as follows:

> 194.9.a.0/24 via ISP1 with no prepend
> 194.9.b.0/24 via ISP1 prepended 3x
> 194.9.a.0/23 via ISP1 with no prepend

> and

> 194.9.a.0/24 via ISP2 prepended 3x
> 194.9.b.0/24 via ISP2 with no prepend
> 194.9.a.0/23 via ISP2 prepended 3x

> When I use the looking glass at lg.he.net I can see the prepends from ISP1
> properly, but I cannot see the prepends from ISP2
> , my traffic works over both links but is very heavy on ISP1

> Does this mean the ISP is stripping the prepends? Is there anything I can do
> about it?

> I hope this is clear, and that somebody may have some insight.

> Many thanks in advance.

> Alex

> --
> Alex Rhys-Hur n | ITworX Limited
> P.O. Box 1649, 00502, Karen, Kenya
> Tel: +254 (0) 20 2444824 | Cell: +254 (0) 724 972541
> Web: www.itworx.co.ke

> _______________________________________________
> afnog mailing list
> http://afnog.org/mailman/listinfo/afnog
-- 
Alex Rhys-Hur n | ITworX Limited 
P.O. Box 1649, 00502, Karen, Kenya 
Tel: +254 (0) 20 2444824 | Cell: +254 (0) 724 972541 
Web: www.itworx.co.ke 
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