On Tue, Jul 30, 2013 at 7:53 AM, Russ White <[email protected]> wrote:

>
> > >And the I-D places heavy emphasis on interfaces which again seems to
> > >have nothing to do with the charter.
> >
> > It's unclear to me how you program a route without an associated
> interface
> > where the data gets sent out. For example in OSPF, if one learns a route
> via
> > OSPF, you know from which neighbor you learnt it from and you know the
> > interface associated with it as well. That's how the router is able to
> send the
> > packets out to the destination.
>
> Actually, it isn't... Routing protocols install routes to a next hop, which
> is then recursed to find the best interface (or set of interfaces) by which
> the local forwarding plane can reach that next hop. I would avoid telling
> the RIB which specific interface to use, as this could have very negative
> effects on load sharing and fast failover solutions --unless the specific
> intent is to provide for load sharing on a per interface level in I2RS. I
>

Even today routes can be added with nexthop as an interface. Consider a
static route with nexthop as a point-to-point unnumbered interface.


> would argue that's more of a job for OpenFlow than I2RS, though.
>

Great. Now we have another use-case for I2RS ;-)


- Sri
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