bgp update destroying transit on redback routers ?

Igor Ybema igor at ergens.org
Thu Dec 1 11:03:17 CST 2011


>
> AGGREGATOR is an optional transitive attribute of length 6.
>
> --
> In theory, there is no difference between theory and practice.
> But, in practice, there is.


Typical, because:

AGGREGATOR is an optional transitive attribute of length 6.
            The attribute contains the last AS number that formed the
            aggregate route (encoded as 2 octets), followed by the IP
            address of the BGP speaker that formed the aggregate route
            (encoded as 4 octets).  Usage of this attribute is described
            in 5.1.7

And what to do with 4-byte AS-numbers then? That would explain the 8 bytes.

regards, Igor



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