From: Godswill Oletu (oletu@inbox.lv)
Date: Mon May 22 2006 - 11:00:24 ART
Passive-interface in OSPF simply means donot form ospf adjacency on this
interface and do not send any routing updates out through this interface and
since, you cannot form adjaceny on that interface, it implies that, do not
accept routing updates from this interface, somewhat different from how RIP
will treat things.
The question that was asked, was:
>What is the best way not to advertise the LAN interfacfe in the OSPF
> process?
Passive interface might not be a solution here; I still believe network
statements with wild card mask might still the best solution under OSPF,
since the poster stated that access-lists not allowed. In RIP it is a
different story because access-list & prefix list with distribute list might
be the only solution there; or if one is skillfull with his/her offset list,
he/she can ensure that those routes are advertised as DOAs (Dead On
Arrival).
As a side note, the fact that access-list are not allowed does not mean that
one cannot use prefix-list; so prefix-list with a distribute list might be
another option to be exploited. Also, a route-map that denies the LAN
interfaces, but permit the allowed interfaces with a distribute list is yet
another way to circumvent the restrictions here.
HTH
Godswill Oletu
----- Original Message -----
From: "Vincent Mashburn" <vmashburn@fedex.com>
To: "Radioactive Frog" <pbhatkoti@gmail.com>; "ccielab"
<ccielab@groupstudy.com>
Sent: Monday, May 22, 2006 9:08 AM
Subject: RE: OSPF question
> What about using passive-interface for your LAN interfaces?
>
> Vince Mashburn
> Voice / Data Engineer
> 901-263-5072
> CCVP, CCNP, CCDA,Network +
> Cisco IP Telephony Support Specialist
> Cisco IP Telephony Operations Specialist
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Radioactive Frog
> Sent: Sunday, May 21, 2006 2:16 AM
> To: ccielab
> Subject: OSPF question
>
> Hi,
>
>
> 192.168.1.x----LAN-----R1---10.2-------------10.1---R2-----LAN----192.16
> 8.3.0
> \ /
>
> \ /
> \-------------R3-------------/
> |
> |LAN
> 192.168.2.0
>
> What is the best way not to advertise the LAN interfacfe in the OSPF
> process? You should be able to enable OSPF on all Serial but not on LAN
> interface of all routers without using the access-list.
>
>
> Regards,
> Frog
>
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