[c-nsp] Verifying BGP Propragation

[Paul Stewart]

The issue is still there....

I appreciate everyone's input so far.... But I'm still lost...

We are trying to confirm the following:

AS11666 is us.

Our three upstreams are AS10520, AS14456, and AS577.  Our downstream is
AS14456 as well.

The problem is that via AS10520 and AS577 we are not seeing AS14456 showing
up.  If I go to level3's looking glass (which is what AS10520 connects
directly to) then I can see some of AS14456's prefixes showing up but not on
the Internet.  If I go to AS577's looking glass (Bell Nexxia) I don't see
any of AS14456's prefixes showing up.

On our edge router I can confirm we are sending out advertisements for these
blocks.  Guess I"ll have to chase down each upstream but was hoping to
confirm that I'm not missing something obvious...:)

Thanks

Paul


-----Original Message-----
From: chintan shah [mailto:chintanshah.j at ddsl.net] 
Sent: Tuesday, July 27, 2004 11:45 AM
To: chintan shah; Earls, Michael; 'Paul Stewart'; 'NSP List'
Subject: Re: [c-nsp] Verifying BGP Propragation


Hi paul,

Now, what is the status of your problem. still exist and solved.

Regards,
chintan


----- Original Message ----- 
From: "chintan shah" <chintanshah.j at ddsl.net>
To: "Earls, Michael" <Michael.Earls at 53.com>; "'Paul Stewart'"
<pauls at nexicom.net>; "'NSP List'" <cisco-nsp at puck.nether.net>
Sent: Sunday, July 25, 2004 9:05 AM
Subject: Re: [c-nsp] Verifying BGP Propragation


> Hi,
>
> You need to go through BGP Attributes and selection algorithm. 
> Actually
BGP
> always select one Best path and it might possible that due to BGP
attributes
> effects from internet path to your downstream through you not best 
> than otherservice provider.
>
> And one more thing, ask your downstream that he might be prepanding AS 
> Number as time of advertising so that your link will become secondary 
> even though routes getting advertised through you and your upstream 
> also.
>
> Hope now , u will get the solutions.
>
> Regards,
> chintan shah.
>
> ******************************************
>
> ----- Original Message -----
> From: "Earls, Michael" <Michael.Earls at 53.com>
> To: "'Paul Stewart'" <pauls at nexicom.net>; "'NSP List'"
> <cisco-nsp at puck.nether.net>
> Sent: Friday, July 23, 2004 3:33 PM
> Subject: RE: [c-nsp] Verifying BGP Propragation
>
>
> > You can do some show commands on your side to verify that you are
sending
> > them your prefixes, Do es either route show up when looking at the
looking
> > glass?
> >
> > shwo ip bgp neighbors x.x.x.x advertised-routes
> >
> > michael
> >
> > -----Original Message-----
> > From: Paul Stewart [mailto:pauls at nexicom.net]
> > Sent: Friday, July 23, 2004 4:38 PM
> > To: 'NSP List'
> > Subject: [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
> >
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