From: Plank, Jason (JPlank@concordefs.com)
Date: Thu May 11 2006 - 11:37:43 ART
This is also correct. When you use the neighbor command you will then stop
multicasting out an interface. It also stops processing inbound packets on
that interface.
EIGRP FAQ:
Q. What does the neighbor statement in the EIGRP configuration section do?
A. The neighbor command is used in EIGRP to define a neighboring router
with which to exchange routing information. Due to the current behavior of
this command, EIGRP exchanges routing information with the neighbors in the
form of unicast packets whenever the neighbor command is configured for an
interface. EIGRP will stop processing all multicast packets coming inbound
on that interface. Also, EIGRP stops sending multicast packets on that
interface.
The ideal behavior of this command would be for EIGRP to start sending
EIGRP packets as unicast packets to the specified neighbor, but not stop
sending and receiving multicast packets on that interface. Since the command
does not behave as intended, the neighbor command should be used carefully,
understanding the impact of the command on the network.
-------------------
Jason Plank
Network Engineer
101 Bellevue Parkway
Wilmington, DE 19809
E-mail: JPlank@concordefs.com
Phone: 302-793-5913
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Schulz, Dave
Sent: Thursday, May 11, 2006 10:29 AM
To: JB
Cc: ccielab@groupstudy.com
Subject: RE: EIGRP - Advertising from specific interface
That is correct. My understanding is, that when you configure the
neighbor command that all updates are then "unicast" to only configured
neighbors, not taking the passive interface into to consideration. I
believe that your lab had the requirement of not using the passive
interface and restricting updates to a particular interface. I would be
interested if there is another way to do this.
Dave Schulz,
Email: dschulz@dpsciences.com
-----Original Message-----
From: JB [mailto:jellyboy@gmail.com]
Sent: Thursday, May 11, 2006 10:18 AM
To: Schulz, Dave
Cc: ccielab@groupstudy.com
Subject: Re: EIGRP - Advertising from specific interface
The neighbor command will unicast advertise to a particular neighbor,
but I don't think it will tell the router what interface to advertise
the update out of.
JB
On 5/11/06, Schulz, Dave <DSchulz@dpsciences.com> wrote:
> JB - Take a look at the neighbor command. This may help you.
>
> Dave Schulz
> Email: dschulz@dpsciences.com
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> JB
> Sent: Thursday, May 11, 2006 2:22 AM
> To: ccielab@groupstudy.com
> Subject: EIGRP - Advertising from specific interface
>
> The lab I am redoing asks for EIGRP updates to be restricted to a
> particular interface without using the passive-interface command. The
> interface address is, for example, 1.1.1.1/24. The WB solution is
> using #network 1.1.1.1 0.0.0.0
> I am just wondering if the line #network 1.1.1.0 0.0.0.255 would also
> be acceptible if none of the other interface on that particular router
> falls within that 1.1.1.0/24 range? I know the #network 1.1.1.0
> 0.0.0.255 is not the best solution, but I believe it still does
> fulfill the requirements..... Any thoughts???
>
> Cheers,
>
> JB
>
>
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