nanog mailing list archives
Re: 32 bits ASN on Cisco
From: "Gary T. Giesen" <giesen () snickers org>
Date: Sun, 11 Apr 2010 02:36:01 -0400
You can still request a 16 bit ASN from the registries, so if this is a concern for a new deployment you're not out of luck (yet). There is a compatibility mechanism, so you can still receive routes sourced from (or passing through) 32 bit ASNs, they will simply appear as AS 23456. Even if you have 32-bit ASN-compatible gear, all your direct peers need to support it as well (more or less), and many providers still don't have support for this yet (for example, the 7600 platform only just got support with 12.2(33) SRE0, and no one in their right mind is running it in production yet). A great resource for information on 32-bit ASN's is http://www.nanog.org/meetings/nanog45/presentations/Tuesday/Hankins_4byteASN_N45.pdf GG On Sun, Apr 11, 2010 at 1:33 AM, Franck Martin <franck () genius com> wrote:
Sorry if it is not the right forum, but I'm trying to get a grip on 32Bits ASN on Cisco I see that feature is available on 12.4(24)T http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6554/ps6599/data_sheet_C78-521821.html Which is available only for "new gear". I don't know how new is the 1800,2800,3800 series, but I know networks still running on 2500 and 2600. So does it mean that to get 32bit ASN you need to get new gear? Seems to me 12.4(24)T is relatively new, and that this feature is not available on the mainline IOS 12.4? So in one hand RIR allocates 32bit ASN, but on the other hand, it is hard to implement it on current equipment? Is that a (un)fair assessment?
Current thread:
- 32 bits ASN on Cisco Franck Martin (Apr 10)
- Re: 32 bits ASN on Cisco Gary T. Giesen (Apr 10)
- Re: 32 bits ASN on Cisco Franck Martin (Apr 11)
- Re: 32 bits ASN on Cisco Łukasz Bromirski (Apr 11)
- Re: 32 bits ASN on Cisco todd glassey (Apr 11)
- Re: 32 bits ASN on Cisco Gary T. Giesen (Apr 11)
- Re: 32 bits ASN on Cisco Greg Hankins (Apr 11)
- Re: 32 bits ASN on Cisco Franck Martin (Apr 11)
- Re: 32 bits ASN on Cisco Gary T. Giesen (Apr 10)
- <Possible follow-ups>
- Re: 32 bits ASN on Cisco Franck Martin (Apr 11)
- Re: 32 bits ASN on Cisco Łukasz Bromirski (Apr 11)
- Re: 32 bits ASN on Cisco Paolo Lucente (Apr 11)