Jeff McCoy,
I agree the administrative distance is 0 for all directly connected
interfaces when using any routing protocol, but as the first entry says from
I think Jeff Walzer routing will first look for the most specific entry-
most contiguous bits specified left to right. So the entry that only
specifies /24 bits will be superceeded by the entry specifying /28 bits
regardless of the administrative distance.
- I just got a refresher on this fact a few minutes ago.
>>>Brian
>From: "Jeff McCoy" <[EMAIL PROTECTED]>
>Reply-To: "Jeff McCoy" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: Subinterface question
>Date: Tue, 7 Nov 2000 09:02:39 -0500
>
>yea..its the routing mechanism that determines the metric...but (correct me
>please) dont all routing protocols give a metric of 0 to directly
>connected
>networks....and therefore, the metric would be 0 in this situation
>regardless of the routing method selected?
>
>""Howard C. Berkowitz"" <[EMAIL PROTECTED]> wrote in message
>news:p0500190cb62c956ab24a@[63.216.127.98]...
> > >If I understand correctly, both networks on the same router..different
> > >subinterfaces. If Im thinking about this correctly, the metric in the
> > >routing table will be 0 because they are both directly connected
>networks.
> > >
> > >Thoughts from anyone else?
> > >
> > >-jm
> > >
> > >""Jeff Walzer"" <[EMAIL PROTECTED]> wrote in message
> > >005501c047ff$1f8a3e00$[EMAIL PROTECTED]">news:005501c047ff$1f8a3e00$[EMAIL PROTECTED]...
> > >> Our internal network has 10 subnets that can be utilitized
>(10.10.1.x -
> > >> 10.10.10.x). The router IP address is 10.10.1.1.
> > >>
> > >> When I create a subinterface for 10.10.2.1 what is the metric for
>the
> > >> 10.10.2.x subnet to get to the 10.10.1.x subnet?
> > >>
> > >> Being that it is the same router will it be 1 or does each
>subinterface
> > >> increment the metric by 1 thereby making the metric 2 for each
> > >subinterface?
> > > >
> >
> > I'm unclear what you both mean when you speak of metrics. No type of
> > interface or subinterface inherently has a metric until you define a
> > routing mechanism with respect to that interface -- and that
> > mechanism defines the metric.
> >
> > So OSPF and EIGRP, in practice, use bandwidth as a metric. RIP uses
> > hop count, which may be what you are thinking of.
> >
> > The zero value for a directly connected network is the administrative
> > distance, which is different from a metric. Administrative distances
> > rank preferences among sources of routing information, lower values
> > being more preferable. For example, an OSPF route with an
> > administrative distance of 110 will never be preferred to a directly
> > connected route. A RIP route (to the same destination) will never be
> > preferred to an OSPF route.
> >
> > (note...I'm assuming here that you use the standard route selection
> > algorithms without overriding anything)
> >
> > Metric is used as a tie-breaker between routes of the same
> > administrative difference.
> >
> > Prefix length is considered before administrative distance. A route
> > of 192.168.0.0/28 from RIP is preferable to any OSPF route to
> > 192.168.0.0/24.
> >
> > _________________________________
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> >
>
>
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