BGP connection to 32bit ASN

jon.harald.bovre · ‎01-20-2009

Hi

in order to configure peering between 16bit ASN and 32bit ASN - what is the requrement?

Would this be the correct configuration?

router bgp 45678

neighbor 1xx.0.0.2 remote-as 3.3

What software supports this configuration? (for C7600, RSP720)

According to Jeff Doyle we would need 12.2SRD, correct?

http://www.networkworld.com/community/node/35767

Jon

Harold Ritter · ‎01-20-2009

Jon,

The 2 byte ASN IOS can't be configured for 4 byte ASN. It sees its 4 byte ASN neighbor as 23456 (reserved ASN for migration purposes).

router bgp 45678

neighbor 1xx.0.0.2 remote-as 23456

For availability of the 4 byte ASN on the 7600, please contact you account team.

Regards

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

jon.harald.bovre · ‎01-21-2009

Thanks

Found IOS for 7200 to test customer CE as 32bit ASN (12.0.32S12).

Connected to old 16bit ASN.

Successful testing!

RIPE now assignes 32bit ASN. I would assume there to pop up some more prefix with as-path 23456 in few days.

Our customer will use Juniper as CE and are soon to be connected using 32bitASN.