Hi,
.-- My secret spy satellite informs me that at Fri, 20 Feb 2009, Giuliano
Peritore wrote:
> I think that the case of AS47868 is the same, because I seed the
> modulo was involved too.
For those interested, I made an overview of longest AS paths observed per day,
starting with Febru
--Original Message-
> > From: Mikael Abrahamsson [mailto:swm...@swm.pp.se]
> > Sent: Friday, February 20, 2009 3:06 PM
> > To: nanog@nanog.org
> > Subject: Re: Lots of prepends - AS20912 case
> >
> > On Fri, 20 Feb 2009, Dorn Hetzel wrote:
> >
>
pletely different story; it's used
to do proxy prepending for your customers.
Ivan Pepelnjak
http://blog.ioshints.info
> -Original Message-
> From: Mikael Abrahamsson [mailto:swm...@swm.pp.se]
> Sent: Friday, February 20, 2009 3:06 PM
> To: nanog@nanog.org
> Subject:
It's just a personal opinion, but I would think that if someone is going to
make the rest of the net suffer the ugliness of a n n n n
n n n n n n n n prepend, then it's not
unreasonable they should have to look at the ugliness in their config file
as
On Fri, 20 Feb 2009, Mikael Abrahamsson wrote:
On Fri, 20 Feb 2009, Dorn Hetzel wrote:
Replacing what is conventially thought to be a string with an integer
multiplier seems a massive violation of the principle of least
astonishment.
3. Prepend number of times entered modulo 256, is just br
On Fri, 20 Feb 2009, Dorn Hetzel wrote:
Replacing what is conventially thought to be a string with an integer
multiplier seems a massive violation of the principle of least astonishment.
On a Cisco running 12.0S:
route-map test1
set as-path prepend last-as ?
<1-10> number of last-AS prepen
Replacing what is conventially thought to be a string with an integer
multiplier seems a massive violation of the principle of least astonishment.
On Fri, Feb 20, 2009 at 8:00 AM, Jon Lewis wrote:
> On Fri, 20 Feb 2009, Giuliano Peritore wrote:
>
>The problem is that differently to Cisco
On Fri, 20 Feb 2009, Giuliano Peritore wrote:
The problem is that differently to Cisco the syntax of the prepend
field on thius system is not a string (eg. "20912 20912 20912") but an
integer, that the user interface _should_ limit to the interval 0-16.
...
The producer has been
Hi all,
I can only cofnirm that AS47868 is using also Mikrotik as their border
BGP router
Tomas
Giuliano Peritore wrote:
The long (176) AS20912 prepend incident was due to a
misconfiguration of a BGP router we were testing.
The problem is that differently to Cisco the sy
The long (176) AS20912 prepend incident was due to a
misconfiguration of a BGP router we were testing.
The problem is that differently to Cisco the syntax of the
prepend field on thius system is not a string (eg. "20912 20912
20912") but an integer, that the user interface _s
> The only ill effect is if set it too low we tested it a bit
> at 20-30 AS path length range figuring we shouldn't see *much*
> and it was staggering over time. The unfortunate thing more
> related to your question is that we found some AS's that were
> prepending 40-50 times to ALL their ups
max-as set too low we had no routing to them at all!
We've had it set to 100 for quite a while now and no side effects
Paul
-Original Message-
From: Seth Mattinen [mailto:se...@rollernet.us]
Sent: Thursday, February 19, 2009 4:50 PM
To: nanog@nanog.org
Subject: Re: lots of
upstreams so with
max-as set too low we had no routing to them at all!
We've had it set to 100 for quite a while now and no side effects
Paul
-Original Message-
From: Seth Mattinen [mailto:se...@rollernet.us]
Sent: Thursday, February 19, 2009 4:50 PM
To: nanog@nanog.org
Subje
Mikael Abrahamsson wrote:
>
> Today 85.119.176.0/21 was announced by AS20912 with 177 prepends. I
> noticed 20912 modulo 256 is 176. AS47868 modulo 256 is 252 which matches
> this mondays prepend-incident.
>
> So, what router OS will put 20912 into a byte and thus end up with 176
> in something l
Paul
-Original Message-
From: Mikael Abrahamsson [mailto:swm...@swm.pp.se]
Sent: Thursday, February 19, 2009 4:21 PM
To: nanog@nanog.org
Subject: lots of prepends
Today 85.119.176.0/21 was announced by AS20912 with 177 prepends. I
noticed 20912 modulo 256 is 176. AS47868 modulo 256 is 252
Today 85.119.176.0/21 was announced by AS20912 with 177 prepends. I
noticed 20912 modulo 256 is 176. AS47868 modulo 256 is 252 which matches
this mondays prepend-incident.
So, what router OS will put 20912 into a byte and thus end up with 176 in
something like "set as-path prepend last-as "
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