From: Pickell, Aaryn (Aaryn.Pickell@xxxxxxxxxxxxx)
Date: Fri May 25 2001 - 16:05:14 GMT-3
Well....
Playing devil's advocate, if you set up both sides of the link as IP
numbered to different interfaces, and still use PPP, dynamic RPs will start
working. But, both sides must be unnumbered for this to work.
With unnumbered, the neighbor on common subnet checks are all disabled, so
they'll start forming adjacencies with the other side. (For IGRP, you have
to manually disable that, and RIP never cared anyway.)
Aaryn Pickell - CCNP ATM, CCDP, MCSE
Senior Engineer - Routing Protocols
Getronics Inc.
Direct: 713-394-1609
Email:aaryn.pickell@getronics.com
This e-mail message and any attachments are confidential and may be
privileged. If you are not the intended recipient, please notify me
immediately by replying to this message and please destroy all copies of
this message and attachments. Thank you.
> -----Original Message-----
> From: Walter Chen [mailto:wchen@iloka.com]
> Sent: Friday, May 25, 2001 1:54 PM
> To: 'Pickell, Aaryn'; 'sanjay'; ccielab@groupstudy.com
> Subject: RE: PPP Encapsulation and OSPF
>
>
> Aaryn was right that PPP will always install a host route of
> the other side
> of the serial (or ISDN) link and "no peer nei" command can remove this
> route. This is because PPP is, after all, a point-to-point
> protocol. The
> host route guarantees connectivity between the end points of
> the link, no
> matter what address you put there. One side can be
> 10.1.1.1/24 and the other
> side can be 200.2.2.2/28 and you can still ping each other.
> Of course, no
> dynamic routing protocol will work across this link.
>
> Walter
>
> -----Original Message-----
> From: Pickell, Aaryn [mailto:Aaryn.Pickell@getronics.com]
> Sent: Friday, May 25, 2001 2:40 PM
> To: 'sanjay'; ccielab@groupstudy.com
> Subject: RE: PPP Encapsulation and OSPF
>
>
> This isn't to do with OSPF. PPP will automatically install a
> host route for
> the IP address of the other side of the link. Switching to
> HDLC doesn't do
> this.
>
> You can use "no peer neighbor-route" to disable this. I think.
>
> Aaryn Pickell - CCNP ATM, CCDP, MCSE
> Senior Engineer - Routing Protocols
> Getronics Inc.
> Direct: 713-394-1609
> Email:aaryn.pickell@getronics.com
>
> This e-mail message and any attachments are confidential and may be
> privileged. If you are not the intended recipient, please notify me
> immediately by replying to this message and please destroy
> all copies of
> this message and attachments. Thank you.
>
>
> > -----Original Message-----
> > From: sanjay [mailto:ccienxtyear@hotmail.com]
> > Sent: Friday, May 25, 2001 1:16 PM
> > To: ccielab@groupstudy.com
> > Subject: PPP Encapsulation and OSPF
> >
> >
> > Hi,
> >
> > I have 2 routers back to back via serial connection. The
> > encapsulation on the
> > serial interface is PPP and the ip address is
> > 172.17.59.166/29. When I do a
> > show IP route, the route table shows 2 networks. One of them is
> > 172.17.59.166/32 and the second 172.17.59.160/29 (this is the
> > subnet between
> > the 2 routers). My question is why this behaviour when
> > running OSPF over PPP
> > on serial links. As soon as I changed the encapsualtion to HDLC, the
> > 172.17.59.166/32 is gone. Any ideas?
> >
> > thanks,
> > Sanjay
> > **Please read:http://www.groupstudy.com/list/posting.html
> **Please read:http://www.groupstudy.com/list/posting.html
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