[[nsp] unroutable?]

joshua sahala joshua.ej.smith at usa.net
Tue Nov 11 12:38:31 EST 2003

Hank Nussbacher <hank at att.net.il> wrote:

> IOS 12.0(25)S2:
> ip route FastEthernet1/0/0
> ip route FastEthernet1/0/0
> TAU-gp1#sho ip rou
> % Network not in table
> TAU-gp1#sho ip rou
> Routing entry for
>    Known via "static", distance 1, metric 0 (connected)
>    Redistributing via ospf 378
>    Routing Descriptor Blocks:
>    * directly connected, via FastEthernet1/0/0
>        Route metric is 0, traffic share count is 1
> Something magical that can't be statically routed?
> -Hank

from rfc1700:
(g)   {127, <any>}

         Internal host loopback address.  Should never appear outside
         a host.

from rfc 3330: - This block is assigned for use as the Internet host
   loopback address.  A datagram sent by a higher level protocol to an
   address anywhere within this block should loop back inside the host.
   This is ordinarily implemented using only for loopback,
   but no addresses within this block should ever appear on any network
   anywhere [RFC1700, page 5].

so in this case, it looks like cisco is following the rfc ;)


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