[c-nsp] Verifying BGP Propragation

[mezibra adel]

Peter,

- Check that your AS macro contains your customer AS, customer route object
are up to date on your/their IRR (RIPE, RADB etc...)? Most provider build
filter based on Internet Routing Registry.
- Its obvious but check that you have always-best path to your customer
through your customer pipe, not thru internet, which may happens if you
tweaked your local pref etc...
- check that the customer is doing the same advertisement at all its
uplink... (No more specific prefix)

- It may be due to some dampening policy in the path too in case of customer
link flapping...


It is difficult to troubleshoot such issue without having detail about all
involved AS / prefixes...

Adel Mezibra


-----Message d'origine-----
De : cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] De la part de Paul Stewart
Envoyé : vendredi 23 juillet 2004 22:38
À : 'NSP List'
Objet : [c-nsp] Verifying BGP Propragation

Hi there...

We have a downstream connection that I'm trying to confirm is actually
appearing through two of our pipes.  The downstream has good connectivity
through other providers so a lot of their inbound traffic is closer than
what we are offering them.

When I try various looking glass sites and route servers our path doesn't
showup most of the time, if any of the time.

How can I verify that filters are not blocking their advertisements from us
effectively?  I have talked to both upstreams and they confirm that
advertisements are showing up on their edge and passing through....

Seems like a really basic thing, but I want to make sure...

Thanks,

Paul

_______________________________________________
cisco-nsp mailing list  cisco-nsp at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/

---
Incoming mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.725 / Virus Database: 480 - Release Date: 19/07/2004
 

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.725 / Virus Database: 480 - Release Date: 19/07/2004