[c-nsp] BGP peering visibility

[Nick Cutting]

Just confirmed with the carrier - and Hve asked for clarification of the local pref they are using /  have set

"Hello Nick,

It appears that what you have set up is correct. You were right in the fact that the ASN after the colon should be ours. With this config, all should work as you expect it to work. "
Regards,

Terrance"

I am setting this specifically 

"This community lowers the local P-NAP's BGP metrics for the route below those of upstream provider values. The route will be unused by PNAP
providers and local customers until all other routes have become unavailable.
Note: Upon recovering from a failover incident it may be necessary to withdraw the route from
your announcements to stop the routes announcement to upstream P-NAP providers."

I think im going to use the poison community and add the Client ISP's ASN with the issue.
There is also a peer level community, however there is no mention of what exactly the LOCAL_PREF will be, only that is is set to the "PEER LEVEL"



-----Original Message-----
From: Mark Tinka [mailto:mark.tinka at seacom.mu] 
Sent: 03 November 2015 14:31
To: Nick Cutting; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] BGP peering visibility



On 3/Nov/15 16:15, Nick Cutting wrote:

>   
>
> However the Other carrier's looking glass - which is what the other 40 percent of clients use, is using the inbound route with multiple prepends and the last resort community.  

Assuming you are announcing consistently, the other provider could be overriding your desires with LOCAL_PREF on their side.

Best to confirm with them, as you are doing.

>
>
> I imagine many people on this list have decent visibility as you probably have multiple peerings.  
> What tools are out there that may help me with my limited visibility?
> I want to see the how the carriers that my clients are using are connected to my own upstream ISP's - I'm not sure how to go about this.

A simple way to view this is with an example below:

    http://bgp.he.net/AS174

Replace with ASN of interest.

Mark.