[nsp] Where does OriginAS and PeerAS come from?

Oliver Boehmer (oboehmer) oboehmer at cisco.com
Thu Sep 4 16:32:15 EDT 2003


> 
> > It does a FIB lookup and takes the AS stored in the FIB.
> > BTW: As there is only limited space in the FIB for stuff like this,
> > we store either peer-as or origin-as in the FIB. This is why "ip
> > flow-export version 5 {peer-as|origin-as}" is a global command
> > applied to all prefixes. The AS is shown when you do a "show ip cef
> > <prefix>": 
> > 
> > router#sh ip cef 198.133.219.0
> > 198.133.219.0/24, version 12932571, epoch 0, per-destination
> > sharing 0 packets, 0 bytes Flow: AS 109, mask 24  <--------
> 
> Is this the same as when I do "sho ip cach flow verbose":
>[...]

Yes, of course. This is the result of the FIB lookup.

	oli



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