From: Oliver Grenham (ogrenham@optusnet.com.au)
Date: Fri Jan 28 2005 - 14:17:00 GMT-3
Is this application (IPCP negotiated address) of the peer neighbor-route
command the only place where it is necessay to leave the command enabled on
a ppp interface? Are there others?
Ollie.
----- Original Message -----
From: "Brian Dennis" <bdennis@internetworkexpert.com>
To: "ccie2be" <ccie2be@nyc.rr.com>; "Group Study" <ccielab@groupstudy.com>;
"mani poopal" <mani_ccie@yahoo.com>
Sent: Friday, January 28, 2005 10:54 PM
Subject: RE: ppp authentication and ip address negoitated
> Tim,
> The peer neighbor-route command 'problem' occurs with certain
> route redistribution scenarios but not in a pure OSPF environment.
>
> Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> bdennis@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987 x 703
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>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> ccie2be
> Sent: Thursday, January 27, 2005 9:39 PM
> To: Group Study; mani poopal
> Subject: Re: ppp authentication and ip address negoitated
>
> Mani,
>
> If you have the Cisco Press book, Troubleshooting IP routing Protocols,
> there's an excellent explanation of this command along with a scenario
> that
> that shows where this command is useful.
>
> I don't remember all the details but the gist of it is this.
>
> By default, ppp, installs a /32 host route when a isdn link comes up and
> de-installs the /32 route when the link goes down. Normally, this is
> not a
> problem. However, with ospf and in some other situations it is.
>
> With ospf, when a new /32 route is installed, that generates LSA's
> because
> ospf considers it a topology change. When the route goes away, that's
> another topology change.
>
> So if you're running an ospf demand circuit over isdn, the ospf database
> will constantly be changing causing the isdn link to flap.
>
> There are some other scenarios where you have a similar problem. I
> can't
> remember all the details but check out this book. It will help you
> alot.
>
> HTH, Tim
>
>
> ----- Original Message -----
> From: "mani poopal" <mani_ccie@yahoo.com>
> To: "Brian McGahan" <bmcgahan@internetworkexpert.com>;
> <ccielab@groupstudy.com>
> Sent: Friday, January 28, 2005 12:08 AM
> Subject: RE: ppp authentication and ip address negoitated
>
>
> > Brian I thought by disabling this feature, router will not istall a
> 32
> bit host route in the routing table. I thought it is a good idea to
> disable
> peer-neighbor route whenever you enable PPP.(may be it is ture only in a
> dialer watch situation). I would like to get your feedback.
> >
> > thanks
> >
> > Mani
> >
> > Brian McGahan <bmcgahan@internetworkexpert.com> wrote:
> > Why did you disable peer neighbor-route? What exactly does this
> feature
> do?
> >
> > Brian McGahan, CCIE #8593
> > bmcgahan@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-224-8987 x 705
> > Outside US: 775-826-4344 x 705
> > 24/7 Support: http://forum.internetworkexpert.com
> > Live Chat: http://www.internetworkexpert.com/chat/
> >
> > ________________________________________
> > From: mani poopal [mailto:mani_ccie@yahoo.com]
> > Sent: Thursday, January 27, 2005 9:13 PM
> > To: mani poopal; Brian McGahan; ccielab@groupstudy.com
> > Subject: RE: ppp authentication and ip address negoitated
> >
> > Hi Brian,
> >
> > These are the output from both router. R8 router is getting ip
> address
> from IPCP(see the show ip int brief output). But I cannot ping the
> other
> router.
> >
> > Mani
> >
> > R8 ROUTER;
> > interface Serial0/0
> > ip address negotiated
> > encapsulation ppp
> > no peer neighbor-route
> > no fair-queue
> > clockrate 56000
> > r8#show ip int brief
> > Interface IP-Address OK? Method Status
> Protocol
> > Ethernet0/0 133.1.28.8 YES NVRAM up
> down
> > Serial0/0 150.100.1.2 YES IPCP up
> up <--IPCP
> > Loopback0 150.1.8.8 YES NVRAM up
> up
> >
> ========================================================================
> ====
> =====
> > R3 ROUTER:
> > interface Serial0/1
> > ip address 150.100.1.1 255.255.255.0
> > ip directed-broadcast
> > encapsulation ppp
> > peer default ip address 150.100.1.2
> > r3#ping 150.100.1.2
> > Type escape sequence to abort.
> > Sending 5, 100-byte ICMP Echos to 150.100.1.2, timeout is 2 seconds:
> > .....
> > Success rate is 0 percent (0/5)
> > r3#
> > r3#debug ppp negotiation-->Not getting any output
> >
> ========================================================================
> ====
> =====
> >
> > mani poopal wrote:
> > Brian,
> >
> > I thought(seen) this on the previous workbook. But in the new work
> book
> you have corrected it and is right(lab3 isdn)[stacker-more cpu
> intensive,
> predictor-more memeory intensive]. Keep up your good work/workbook.
> Regarding ip address negotiated, I will again try this on back to back
> router lab and send the output.
> >
> > thanks
> >
> > Mani
> >
> > Brian McGahan wrote:
> > > (1.)The practical studies vol 1 says to stacker is more cpu
> intensive
> > and
> > > predictor is more memory intensive(pg:303). I think from IEWB I
> > studied
> > > otherway around. Can somebody confirm
> >
> > This is correct. Predictor uses more memory because it has to store
> > previous packet streams to make predictions on further ones. It should
> > be listed this way in IEWB-RS; if it is not let me know and I'll take
> a
> > look at it.
> >
> > For the second part post your config and "debug ppp negotiation"
> output.
> >
> >
> > HTH,
> >
> > Brian McGahan, CCIE #8593
> > bmcgahan@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-224-8987 x 705
> > Outside US: 775-826-4344 x 705
> > 24/7 Support: http://forum.internetworkexpert.com
> > Live Chat: http://www.internetworkexpert.com/chat/
> >
> >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> > Of
> > > mani poopal
> > > Sent: Thursday, January 27, 2005 5:47 AM
> > > To: ccielab@groupstudy.com
> > > Subject: ppp authentication and ip address negoitated
> > >
> > > Guys two small questions
> > > (1.)The practical studies vol 1 says to stacker is more cpu
> intensive
> > and
> > > predictor is more memory intensive(pg:303). I think from IEWB I
> > studied
> > > otherway around. Can somebody confirm
> > > (2.)in ppp encapsulation:
> > > Is it possible to configrue 2 back to back routers with ppp
> > encapsulation
> > > and use "peer-default ip address x.x.x.x" on one router and "ip
> > address
> > > negotiated "on the other router. and see connectivity between these
> > two
> > > routers. I tried but is not working, in the router where ip address
> > > negotiated was given, it shows ip address by ipcp but doesn't show
> the
> > ip
> > > address. And both interfaces shows up/down(I already checked the
> > clock
> > > rate). Any suggestion how the above commands works
> > >
> > > thanks
> > >
> > > Mani
> > >
> > >
> > > B.ENG,A+,CCNA,CCNP,CCNP-VOICE, CSS1,CNA,MCSE
> > > (416)431 9929
> > > MANI_CCIE@YAHOO.COM
> > >
> > > ---------------------------------
> > > Do you Yahoo!?
> > > Yahoo! Search presents - Jib Jab's 'Second Term'
> > >
> > >
> >
> _______________________________________________________________________
> > > Subscription information may be found at:
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> >
> >
> > B.ENG,A+,CCNA,CCNP,CCNP-VOICE, CSS1,CNA,MCSE
> > (416)431 9929
> > MANI_CCIE@YAHOO.COM
> >
> > ---------------------------------
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> > Yahoo! Search presents - Jib Jab's 'Second Term'
> >
> >
> _______________________________________________________________________
> > Subscription information may be found at:
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> >
> >
> > B.ENG,A+,CCNA,CCNP,CCNP-VOICE, CSS1,CNA,MCSE
> > (416)431 9929
> > MANI_CCIE@YAHOO.COM
> > ________________________________________
> > Do you Yahoo!?
> > Yahoo! Search presents - Jib Jab's 'Second Term'
> >
> >
> > B.ENG,A+,CCNA,CCNP,CCNP-VOICE, CSS1,CNA,MCSE
> > (416)431 9929
> > MANI_CCIE@YAHOO.COM
> >
> > ---------------------------------
> > Do you Yahoo!?
> > Yahoo! Search presents - Jib Jab's 'Second Term'
> >
> >
> _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
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>
> _______________________________________________________________________
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