[c-nsp] Re: 7500 PPPoE dCEF aggregation

Gert Doering gert at greenie.muc.de
Mon Jan 17 15:20:07 EST 2005


Hi,

On Mon, Jan 17, 2005 at 06:27:56PM +0100, Oliver Boehmer (oboehmer) wrote:
> > Out of curiosity: for these tunnels which VIP does the encapsulation
> > work? The VIP that has the outgoing interface corresponding to the
> > "tunnel dest" IP?  Or can you tie GRE/L2TP processing to a specific
> > VIP (sort of like the Juniper Tunnel PIC)?
> 
> As with most other features, the ingress VIP is performing the actual
> work on the 7500. 

Ah.  So packets that come in "natively" on, say, VIP2 to be GRE-encapsulated
and leave via VIP5 will be encapsulated on VIP2?  Makes sense, of course :-)

(I was thinking along the lines of "GRE packets have no egress interface"
but I forgot how GRE+CEF works :-) )

Thanks,

gert
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de


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