connecting to two different ISPs v2

[sivakondalarao]

Hi,

Right now I have one ISP link. In future we are getting another ISP link. At present our all servers are using present ISP public IPs.

My doubt is even though getting second ISP link, if first link goes down, how second ISP route the traffic to our servers which are using first ISP public ISPs.

So we are planning to implement BGP on internet router. Then how to implement BGP on it. We didn't own public AS number.

Regards

skrao

[sundar.palaniappan]

Your 2nd ISP has to agree to route for the 1st ISPs IP space provided to you. You don't need a public AS. Your 2nd ISP can provide you a private AS.

When advertising your IP space, provided by your 1st ISP, to your 2nd ISP you can make this path less desirable for ingress traffic from the Internet by using one of the many BGP attributes available for inter-AS path manipulation.

The following link has scenarios for dual-homed setup that should aid you in configuration.

http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a00800945bf.shtml

Pls. rate the post if it helped.

HTH,

Sundar