[AusNOG] Issue getting routes from Telstra to 49.156.16.0/22

[Matthew Moyle-Croft]

On 02/05/2012, at 1:18 PM, Wade Millican wrote:

> Hi Matthew,
> 
> The original suggestion was mine and I'll own it. Sheng's original question of which I was replying to, was in an outage situation where another AS is claiming ownership of your net block what actions could be taken to enable resumption of service. This style of discussion is something I'm interested in hearing about, other than nag the upstreams which is slow at best. Actions that can be taken by the AS in question to resume service.

My point is that if everyone is already de'agged to /24s then you have no where left to run.  So don't.  Just advertise the minimum set of routes to begin with and then only have to deagg a bit.  

> 
> Yes, let's think of the TCAM, but let's try resume service first. If Telstra accept the route (and my hunch is they will), sort that out before trying to work out Layer 8.

I'll bet that NO ONE withdraws the route later.  

> 
> Any other creative solutions on how to gain control back of one's prefixes?

Don't deagg so much to begin with so you have the ability to get them back later.

Other option is to poison the route with Dodo's AS number stuffed into the path.

MMC



> 
> Cheers,
> 
> Wade
> 
> 
> From: Matthew Moyle-Croft <mmc at mmc.com.au>
> Date: Tue, 1 May 2012 20:35:56 -0700
> To: James Spenceley <james at vocus.com.au>
> Cc: Wade Millican <wade.millican at echoent.com.au>, "ausnog at ausnog.net" <ausnog at ausnog.net>
> Subject: Re: [AusNOG] Issue getting routes from Telstra to 49.156.16.0/22
> 
> James,
> Please don't encourage de-agg to /24 and below.  It's bad enough that an Australian network is on the top 10 global de-agg'ed list.
> 
> Everyone:  Advertise the shortest prefixes you can, then you only have to go one bit down to be more specific.  Jumping straight to /24s is just awful.
> 
> Won't someone PLEASE think of the TCAM?
> 
> MMC
> 
> On 02/05/2012, at 9:33 AM, James Spenceley wrote:
> 
>> 
>> On 02/05/2012, at 9:32 AM, Wade Millican wrote:
>> 
>>> Hi Sheng,
>>> 
>>> I'd start by trying to advertise more specific prefixes. I see below that Dodo was adverting /24's. If Telstra allows /25 routes to be advertised you'll trump any AS_Path selections pointing to Dodo.
>> 
>> Normally you would expect a provider to filter /25s but hey it seems telstra seem willing to accept almost anything, so well worth a try :)
>> 
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