Re: Multihoming - Resilience or Independence

[Anne Marcel Roorda <]

In message <Pine.GSO.4.10.10110161001090.2284-100000@localhost>, Kurt Erik Lindq
vist KPNQwest writes:

> 
> > >like route flaps do we?. In my opinion OSPF + 2 access links to 2 POPs of
> > >single ISP would do the you much better. I wonder why virtually nobody
> > >offers such a service? 
> > 
> > Because extending your IGP to customer sites is a bit silly, bloating your
> > IGP and inducing a potential for misinformation from an external domain.
> > You really don't want to do this. It may work well in small networks but
> > certainly not in large players.
> 
> This assumes that the CPE is under the control of the customer, but you
> could equally have the Eth interface as the demarcation point so that you
> own the CPE.

Hi,

  Even if the CPE is under direct control, you'd have to include all
edge devices where customers connect into the IGP. Add in all CPE
devices and you have something that will not scale.

  Limiting the number of locations where this is done would scale, but
may create other problems.

- marcel