[afnog] 32 bit ASN

[a.onuche at nixp.net]

Hello All,

Thanks for all your response.
the  error message was " the valid range for AS number is 1 to 65535"

Scourge the Internet for downloads. Does any one have an idea where i can
download/upgrade the appropriate software both for Foundry BigIron Router
and Cisco 2800 (Cisco IOS Software Release 12.4(24)T)

Thanks
Anibe



> On Tue, 25 Jan 2011 00:51:11 -0600 a.onuche at nixp.net wrote:
>> We applied for an ASN number from Africnic and was given a 32bit ASN
>> number.
>> To my dismay,Our equipment rejected the ASN number,
>> How do i implement a 32 bit ASN on older equipment?
>> What are the options and the best way possible round this?
>
> The depletion of the 16-bit ASN space, and the introduction of 32-bit
> ASN numbers, has been going on for a number of years now.
> The policy defining the transition mechanism AFPUB-2005-ASN-001,
> has been around for more than 5 years now.
>
> You will need to upgrade the IOS on your BGP speaker if it does not
> understand 32-bit ASNs. I'm sure others (tinka?) can tell what
> version to use - I'm not versed in IOS releases.
>
> Your peers do not need to upgrade, though upgrading is advisable.
> To non-32-bit capable BGP speakers, you will look like AS 23456.
> That works, and works well, except that all 32-bit ASN speakers
> will look like AS23456 and hence the peer cannot set policy based
> on AS path.
>
> We demonstrated that 32-bit ASNs do work at the 2009 AfNOG meeting,
> where the event network was announced from AS327685.
>
> There is good reading on this topic. See, for instance,
> -
> http://www.cisco.com/web/about/ac123/ac147/archived_issues/ipj_9-1/autonomous_system_numbers.html
> - http://www.ripe.net/info/faq/rs/asn32.html
>
> Note that there are various different ways to write down 32-bits ASN
> numbers,
> like AS327685, AS5.5. Consensus is to use the first format (see RFC5396),
> though you may see other formats in older documentation or in
> some early implementations.
>
> Hope this helps,
>
> Geert Jan
>
>