BGP ORIGIN attribute

[olegf0001]

Hello all,

I will be happy for some explanation about BGP ORIGIN attribute. The main question is when it IGP and when INCOMPLETE? As far as I understand it any redistribution will make it INCOMPLETE, and the network command will make it "IGP". 

Second question, is how can this be understand from the RFC:

RFC 4271:

a) ORIGIN (Type Code 1):

            ORIGIN is a well-known mandatory attribute that defines the origin of the path information.  The data octet can assume
            the following values:

               Value      Meaning

               0         IGP - Network Layer Reachability Information
                            is interior to the originating AS

               2         INCOMPLETE - Network Layer Reachability
                            Information learned by some other means

Thanks

[Reza Sharifi]

Hi,

The origin routes are 3 different types;

0   IGP learned routes

1   EGP learned routes

2   Incomplete routes

HTH

[olegf0001]

Hi,

I know, but EGP is deprecated so I didn't write it.

[Michael Deku]

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