new to thge BGP config

[vishalpatil86]

Hi folks,

I want to configure BGP but i am finding it very difficult to know BGP as I am new to this concept.

so, anyone can help me on thereotical and practical approach to configure bgp??

I have to configure my office router 2811 for two ISPs which will be acting as failover.

I have to start it from scratch, help me on this..!!!!!

and let me know if u want to anythng from my side...

[Konstantin Dunaev · Accepted solution]

unfortunatly nobody can  help you except yourself - first of all you need to invest a couple of days and read at least on cisco.com a couple of articales about BGP, after that you will able at least ask correct questions.

We can help you to configure BGP for a special usage but nobody will do the configuration for you.

[Kishore Chennupati]

Hi Vishal,

As Konstantin suggested you need to do a bit of homework. but I can understand sometimes we are put in the spot and there is no time to waste. so I will try to give you some help here.

This link should help you in your set up. Let us know if you have further questions

http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a008009456d.shtml

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

HTH

Kishore

[vishalpatil86]

hi kishor,

thanks for the link.

I want to setuop BGP with two ISP redundancy.

Whille reading document of BGP i came to know there are certain requirements to setup BGP

first is we have to have /24 pool from atleast one ISP and

AS number(is it private or public?)

I want to know what is it and why do we require this?

[Mahesh Gohil]

Hi Vishal,

You assumption is correct.

If you are connected to two ISP requirement is

> Portable IP assignment from local registry: apnic for example. Because even if your ISP has asigned /24 ip your second ISP will not announce it because AS Blacklisting issue.

> Public AS asignment from registry..i.e apnic. By default they provide 4 byte AS number so you can ask for 2 byte AS number if that is your requirement.

Regards

Mahesh

[Konstantin Dunaev]

Hi,

as Mahesh has said, you need a public AS and a "PI" (Provider independet) subnet.

There is also a possibility to get from both ISP their PA subnets and with help of NAT get a failover configuration,

see this link:

http://www.cisco.com/en/US/tech/tk648/tk361/technologies_white_paper09186a0080091c8a.shtml