Using 32 bit ASN numbers

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1

I am doing some research for our company regarding 32 bit ASN numbers. I am
trying to locate information about vendor and service provider support. In
particular I have not been able to find what Cisco IOS image I would need to
load on our router to support 32 bit ASN's. I also want to know what
experience people have had with service provider support of 32 bit ASN's

2

Cisco IOS XR Software Release 3.4.0 adds support for BGP Authentication Key Chaining, BGP 4-Byte Autonomous System Number (ASN), and BGP Next Hop tracking enhancements.
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.4/general/release/notes/reln_34.html#wp239046
BGP 4-Byte ASN—Increases the range of supported autonomous systems from 2 bytes to 4 bytes to scale with expected Internet growth.

12.2SR* is supposed to be in late 2008, but has not yet been announced publicly.

Juniper it's in JUNOS 9.1 as farr as I can tell.

3

These are the dates I have for Cisco platforms:

IOS XR 3.4 - September 2007
IOS 12.0(32)S11 - November 2008
IOS 12.2SRE - December 2008
IOS 12.5(1)T - April 2009

4

Pender,

One small correction... For 7600, 12.2SR, the support would come out in
12.2SRD

Arie

5

Concerning 32 bit AS numbers, are organizations which are granted 32 bit AS
numbers given any multicast address space?

If so is it possible to figure out what this space is from the ASN ala GLOP
(233.ASN.ASN.x)?

Thanks,

Haven Hash

6

Concerning 32 bit AS numbers, are organizations which are granted 32 bit AS
numbers given any multicast address space?

If so is it possible to figure out what this space is from the ASN ala GLOP
(233.ASN.ASN.x)?

Yes, and yes.

The space they are given is the GLOP space !

See

http://www.multicasttech.com/faq/#GLOP

and

http://www.shepfarm.com/multicast/glop.html

Regards
Marshall

7

Concerning 32 bit AS numbers, are organizations which are granted 32 bit AS
numbers given any multicast address space?

Oh, and there is a plan in the works to accommodate those with 32 bit ASN.

Regards
Marshall

8

Marshal,

Since his question was specifically about I don't see the answer
in either of the places you referenced.... The calculator didn't
like a 32 bit ASN:

AS Number Out of Range

AS numbers are represented by 16 bits; 65535 maximum in decimal.

Back to the GLOP Calculator
Return to Shepfarm Multicast

shep@shepfarm.com

Owen

9

Marshal,

Since his question was specifically about I don't see the answer
in either of the places you referenced....

Sorry, I was too eager to respond. The assignees of the 32 bit ASN will have to ask for
space from IANA from the former "eGLOP" space, now the Extended AD-HOC space.

There will be no automatic pre-assignment of space,
see http://www.ietf.org/internet-drafts/draft-ietf-mboned-rfc3171bis-03.txt
for details.

This has not become an RFC yet, and if people have comments, we welcome them on the MBONED list.

Regards
Marshall

The calculator didn't
like a 32 bit ASN:

AS Number Out of Range
AS numbers are represented by 16 bits; 65535 maximum in decimal.

No, likely not.

Marshall