Owen, thanks for this explanation. +1!
Eric Miller, CCNP
Network Engineering Consultant
(407) 257-5115
-Original Message-
From: Owen DeLong [mailto:o...@delong.com]
Sent: Wednesday, December 18, 2013 2:07 PM
To: Cliff Bowles
Cc: nanog@nanog.org
Subject: Re: IPv6 /48 advertisements
Yes, from a filtering point of view a /48 in IPv6 is pretty similar to a /24 in
IPv4, as perfectly illustrated by the two links in my post…
My point was that if you are getting the carrier to do the announcement for you
then they can announce an aggregated /48 prefix and then break that up insid
Get another /48 for your other location.
Owen
On Dec 18, 2013, at 08:53 , Antonio M. Moreiras wrote:
> What do you recommend to an end user that have a direct assignment of a
> /48, and would like to disaggregate as part of a traffic engineering
> strategy?
>
> Moreiras.
>
> On 18/12/13 14:32
On Dec 18, 2013, at 08:11 , Cliff Bowles wrote:
> I accidentally sent this to nanog-request yesterday. I could use some
> feedback from anyone that can help, please.
>
> Question: will carriers accept IPv6 advertisements smaller than /48?
Generally, no. Since a /48 should represent nothing la
Your TE is not the rest of the world's routing slot's problem. Get more
circuits and do your te with your providers directly.
-Blake
On Dec 18, 2013 10:57 AM, "Antonio M. Moreiras" wrote:
> What do you recommend to an end user that have a direct assignment of a
> /48, and would like to disaggreg
What do you recommend to an end user that have a direct assignment of a
/48, and would like to disaggregate as part of a traffic engineering
strategy?
Moreiras.
On 18/12/13 14:32, Blake Dunlap wrote:
> Regardless of the carriers, you'll find most ASs on the internet only
> listen to /48 or larger
On 2013-12-18 17:11 , Cliff Bowles wrote:
> I accidentally sent this to nanog-request yesterday. I could use some
> feedback from anyone that can help, please.
>
> Question: will carriers accept IPv6 advertisements smaller than /48?
>
> Our org was approved a /36 based on number of locations.
I
I had a feeling... thanks for the feedback.
CWB
From: Blake Dunlap [mailto:iki...@gmail.com]
Sent: Wednesday, December 18, 2013 9:32 AM
To: Edward Dore
Cc: Cliff Bowles; nanog@nanog.org
Subject: Re: IPv6 /48 advertisements
Regardless of the carriers, you'll find most ASs on the internet
On Wed, 18 Dec 2013, Cliff Bowles wrote:
Question: will carriers accept IPv6 advertisements smaller than /48?
Most of the carriers I've seen won't accept anything smaller than /48.
You have 4096 /48s to use in your /36. The bigger concern for carriers/ISPs
is IPv6 routing table bloat from c
It's standard to filter out anything longer than /48.
Your /36 prefix was chosen based on the number of sites, with a /48 per site,
so just keep it simple. Trying to manage it in the way IPv4 addresses were
managed will just ensure that you will have the same headaches of micro
managing sub al
Regardless of the carriers, you'll find most ASs on the internet only
listen to /48 or larger. So even if you get your prefixes accepted by your
provider, don't assume you can get anywhere, or have your packets not fall
in to uRPF blackholes randomly without a larger aggregate announcement.
-Blake
If you’re talking about announcing each location separately, then RIPE have a
couple of useful articles about prefix visibility on Ripe Labs:
https://labs.ripe.net/Members/emileaben/ripe-atlas-a-case-study-of-ipv6-48-filtering
https://labs.ripe.net/Members/dbayer/visibility-of-prefix-lengths
Oth
On Wed, Dec 18, 2013 at 09:11:46AM -0700, Cliff Bowles wrote:
> Question: will carriers accept IPv6 advertisements smaller than /48?
Not generally, no.
> Our org was approved a /36 based on number of locations. The bulk of
> those IPs will be in the data centers. As we were chopping up the
> add
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