From: sabrina pittarel (sabri_esame@yahoo.com)
Date: Sun Aug 13 2006 - 16:20:50 ART
Don't worry...indeed it helped.
Especially this part:
Optionally, an IP subnet can be assigned to
> the point-to-point
> network. In this case, both routers advertise a stub
> link to the IP subnet,
> instead of advertising each others' IP interface
> addresses.
It made me think of a p2p or a p2mp case. There we get
the same behavior as for the loopback case and we
consider acceptable for the /32 route to be
advertised.
Sabrina
--- Victor Cappuccio <cvictor@protokolgroup.com>
wrote:
> Ohhh sorry I misunderstood your question...
>
> That's the bad thing of waking up so late in
> Sundays, the Mind Translation
> English - Spanish Dictionary was not completely
> loaded ;-D
>
> So in regards to your question, it would depend of
> the requirement
>
> Victor
>
> -----Mensaje original-----
> De: Victor Cappuccio
> [mailto:cvictor@protokolgroup.com]
> Enviado el: Domingo, 13 de Agosto de 2006 03:08 p.m.
> Para: 'sabrina pittarel'; 'Group Study (E-mail)'
> Asunto: RE: OSPF, loopbacks and CCIE
>
> This is nice question, reading the RFC 2328 should
> respond that
>
> The LOOP . . BACK is for the routers, it loopbacks
> back to me, there is no
> Router in the PATH ;D
>
> Parts that I think the RFC 2328 is trying to respond
> this could be:
>
> host routes are classified as links to stub networks
> with network mask of
> 0xffffffff , means = 255.255.255.255
>
> An edge connecting a router to a network indicates
> that the router has
> an interface on the network. Networks can be either
> transit or stub
> networks.
>
> Transit networks are those capable of carrying data
> traffic that is neither
> locally originated nor locally destined. A transit
> network is represented by
> a graph vertex having both incoming and outgoing
> edges. A stub network's
> vertex has only incoming edges.
>
> When interface addresses are assigned, they are
> modeled as stub links, with
> each router advertising a stub connection to the
> other router's interface
> address. Optionally, an IP subnet can be assigned to
> the point-to-point
> network. In this case, both routers advertise a stub
> link to the IP subnet,
> instead of advertising each others' IP interface
> addresses.
>
> HTH
> Victor.-
>
>
> -----Mensaje original-----
> De: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] En nombre de
> sabrina pittarel
> Enviado el: Domingo, 13 de Agosto de 2006 02:48 p.m.
> Para: Group Study (E-mail)
> Asunto: OSPF, loopbacks and CCIE
>
> Hi all,
> as you know OSPF advertise loopbacks as /32 networks
> (stub network) regardless of the "real" mask
> associated to them.
> If the lab asks to advertise the loopback in ospf
> area
> X (i.e. without using redistribution), should we
> make
> sure the "real" subnet is advertised or a /32
> network
> is acceptable?
>
> Sabrina
>
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This archive was generated by hypermail 2.1.4 : Fri Sep 01 2006 - 15:41:57 ART