From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Mon Oct 04 2004 - 21:38:32 GMT-3
As well as BGP.
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: Monday, October 04, 2004 7:04 PM
> To: Xy Le; marvin greenlee; ccielab@groupstudy.com
> Subject: Re: ospf router-id [bcc][faked-from][bayes]
>
> Ok guys,
>
> So to be on the safe side we should try to hard code router-id as
> loopback interface (loopback 0) for ospf and eigrp and not arbitary ip
> address(3.3.3.3) to avoid any conflicts and to avoid loss of
us$1250.00.
> Thanks all.
>
> Mani
>
> Xy Le <byme88@hotmail.com> wrote:
> Marvin and Brian are absolutely correct!
>
> Take it from my real life lab exam experience regarding "duplicate
Router
> ID
> in OSPF"!!!
>
> Let just say it almost cost me $1,250.00 plus hotel and air fare!!!!!
:)
>
> Xy
> ----- Original Message -----
> From: "marvin greenlee"
> To: "'mani poopal'" ;
> Sent: Monday, October 04, 2004 9:36 AM
> Subject: RE: ospf router-id [bcc][faked-from][bayes]
>
>
> > Look at it from the point of view of a backbone router. If there is
a
> > shared backbone router that connects to multiple racks, the router
will
> have
> > problems if the person on Rack1 chooses 1.1.1.1 for their router ID,
and
> the
> > person on Rack2 also uses 1.1.1.1.
> >
> > - Marvin Greenlee, CCIE#12237
> > Network Learning Inc
> > marvin@ccbootcamp.com
> > www.ccbootcamp.com (Cisco Training)
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> mani
> > poopal
> > Sent: Monday, October 04, 2004 12:25 PM
> > To: Brian Dennis; ccielab@groupstudy.com
> > Subject: RE: ospf router-id [bcc][faked-from][bayes]
> > Importance: Low
> >
> > Hi Brian,
> >
> > Thanks for the advise. I thought we could use any ip address to
hardcode
> as
> > a router id because we are not advertising these ip addresses by any
> routing
> > protocol. The hard coded router id(if it is not loopback addresses)
are
> > going to be used only between/among neighbors.
> >
> > thanks
> >
> > Mani
> >
> > Brian Dennis wrote:
> > Mani,
> > Since in the real lab you may interact with backbone routers
> > that are shared with other candidates, select a router ID that is
> > unique. 1.1.1.1, 2.2.2.2 and 3.3.3.3 may not be unique. In your home
> > lab they may be unique but in the real lab, the possibly exists that
you
> > area sharing backbone routers and could possibly end up using the
same
> > router ID as someone else. To help guard against this possibility,
pick
> > an existing loopback address to hard code as your OSPF, EIGRP and/or
BGP
> > router ID or pick X.X.Y.Y where X is your rack number and Y is the
> > device number (1=R1, 2=R2, etc).
> >
> > Plus hard coding the loopback address as the router ID is good
> > habit to be in for real world implementations.
> >
> > Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> > bdennis@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-224-8987
> > Direct: 775-745-6404 (Outside the US and Canada)
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> > mani poopal
> > Sent: Monday, October 04, 2004 9:48 AM
> > To: OzgurG@garanti.com.tr; swm@emanon.com; ccielab@groupstudy.com
> > Subject: RE: ospf router-id
> >
> > Hi
> >
> > Thanks all for your responses. After Scott's email I might hard code
> > router# (eg:for R4 router id=4.4.4.4) as router-id for eigrp and
ospf.
> > Hi I know that we can't use 0.0.0.0(joke). Guys this forum is very
good,
> > so read and enjoy.
> >
> > Mani
> >
> > OzgurG@garanti.com.tr wrote:
> > Except that you can not configure it 0.0.0.0 on Cisco routers.
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> > Scott Morris
> > Sent: 04 October 2004 17:14
> > To: 'mani poopal'; ccielab@groupstudy.com
> > Subject: RE: ospf router-id
> >
> > The router id is simply a 32-bit number. You may set it to anything
> > your heart desires!
> >
> > As long as your lab doesn't require the router-id to be something in
> > particular, or there is an instruction telling you not to manually
set
> > the router-I or anything like that, then you're cool to go!
> >
> > HTH,
> >
> >
> > Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
> > CISSP, JNCIP, et al.
> > IPExpert CCIE Program Manager
> > IPExpert Sr. Technical Instructor
> > swm@emanon.com/smorris@ipexpert.net
> > http://www.ipexpert.net
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> > mani poopal
> > Sent: Monday, October 04, 2004 2:33 AM
> > To: ccielab@groupstudy.com
> > Subject: ospf router-id
> >
> > Hi Group,
> >
> > Is it ok to hard code router id of a ospf router(router-id 3.3.3.3
to
> > other than a non given address(assume 3.3.3.3 for R3)ie:Do we have
to
> > hard code the loopback ip address. If it is loopback addresss we are
> > going to advertise it in to ospf and if it is non given ip address
we
> > are not going to advertise in to ospf. I know you can give a non
given
> > ip address as a router id and not to advertise it in to ospf, but is
> > this ok for the lab exam.
> >
> > thanks
> >
> > Mani
> >
> >
> > B.ENG,A+,CCNA,CCNP,CCNP-VOICE, CSS1,CNA,MCSE
> > (416)431 9929
> > MANI_CCIE@YAHOO.COM
> >
> > ---------------------------------
> > Do you Yahoo!?
> > Yahoo! Mail Address AutoComplete - You start. We finish.
> >
> >
This archive was generated by hypermail 2.1.4 : Sat Nov 06 2004 - 17:11:42 GMT-3