Route Server Filters at IXPs and 4-byte ASNs

Bryan Socha bryan at
Sat Jan 25 15:38:11 UTC 2014

Re-reading, I was thinking of someone connecting to an IXP, not a new IXP
needing a 2Byte.    This is an interesting situation and you are correct,
my comment was off topic.

*Bryan Socha*
Network Engineer
646.450.0472 | *bryan at <bryan at>*

*ServerStack* | Scale Big

On Sat, Jan 25, 2014 at 10:18 AM, Job Snijders <
job.snijders at> wrote:

> On Sat, Jan 25, 2014 at 10:04:30AM -0500, Bryan Socha wrote:
> > I have over 100,000 servers located in routing diverse datacenters
> > with 4byte ASN numbers and have not had 1 problem or complaint related
> > to the ASN for not able to communicate with the datacenter.  The first
> > 1 did make me really nervous for all of the reasons already mentioned
> > but turned out to be a non-issue.
> This thread is not about reachability of prefixes announced by 4-byte
> ASNs. This thread is about prefix filtering on Route Servers at Internet
> Exchanges.
> > While it would be nice to see community string support increase to
> 4byte, I
> > think this is more of an educational challenge for the IXPs on how to
> setup
> > your community strings to work and not really a technical problem.
> Can you elaborate on how you would setup 'community strings'?
> Kind regards,
> Job

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