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Re: iBGP next hop and multi-access media
- From: Pete Templin
- Date: Mon Oct 07 08:40:33 2002
On Mon, 7 Oct 2002, Ralph Doncaster wrote:
> When you setup a secondary ip on an interface
> int fa0/0
> ip address a.b.c.d e.f.g.h secondary
> How does it determine where to send the packets? ARP.
> Which is the same as adding the route described above.
>From what I've read so far, it looks like you're asking for is more like
automatic discovery of new subnets local to a given segment, followed by
preferential route selection similar to HSRP.
Except above, you're claiming that adding a secondary interface is the
same as adding a route. It's not, as adding the secondary interface
provides a logical link between a layer 3 address and a layer 2 address,
so that ARP is not needed to find the next-(layer 3)-hop, only to find the
next layer 2 hop.
Again, let's move routing 101 to different venue.
Peter J. Templin, Jr., CCNP, CCDP
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