EIGRP AS vs. BGP AS

[rate]

Hi,

I'm currnetly studying for the CCNP exam. One thing which I haven't found an answer to, is whether the AS numbers in a internal company running EIGRP must match the AS number provided by the ISP for the company with BGP?

Thanks in advance,

Rasmus

[Georg Pauwen]

Hello,

BGP AS numbers and EIGRP AS numbers have nothing to do with each other. BGP actually differentiates between public AS numbers in the range of 1 - 64511 and private AS numbers in the range of 64512 to 65535. Although the EIGRP AS numbers have the same range (1 - 65535) there is no correlation.

HTH,

GP

[rate]

Hi,

First of all - thanks for your prompt reply.

Last thing:

Are the EIGRP AS numbers all private then?

Rgds,

Rasmus

[Georg Pauwen · Accepted solution]

Hello Rasmus,

yes, all EIGRP AS numbers are private and free to choose within your network, they are never advertised on the Internet.

Regards,

GP