From: cacca mucca (caccamucca@hotmail.com)
Date: Sun Jul 17 2005 - 21:26:52 GMT-3
Chris, thanks.
>From: "Chris Lewis (chrlewis)" <chrlewis@cisco.com>
>Reply-To: "Chris Lewis (chrlewis)" <chrlewis@cisco.com>
>To: "cacca mucca" <caccamucca@hotmail.com>, <jjrinehart@hotmail.com>,
><ccielab@groupstudy.com>
>Subject: RE: LAB study guide
>Date: Sun, 17 Jul 2005 15:57:51 -0400
>
>Hi,
>
>I'd not recommend generalizaions on this topic. I was referring to a
>specific case of having two routing domains joined at two points with
>mutual redistribution on both points. In the simple diagram below, this
>means mutual redistribution between RP1 and RP2 on R1 and R2. Many
>routing loops can be fixed with AD manipulation, however the real danger
>is in generalizing. There is no substitute for understanding why the
>routing decisions are being made and deciding to change things to get
>desired behavior. If you want to explore this further, put together a
>few scenarios for discussion. Talking about specific cases is more
>meaningful for this topic IMHO.
>
>Routing protocol 1
>| |
>R1-------R2
>| |
>Routing protocol 2
>
>For that EIGRP works well, as it has the high external metric concept,
>you can make OSPF similar by using distance ospf external, so
>restricting the case to the one I'm referring to, some more responses
>in-line below:
>
>-----Original Message-----
>From: cacca mucca [mailto:caccamucca@hotmail.com]
>Sent: Sunday, July 17, 2005 12:16 PM
>To: jjrinehart@hotmail.com; Chris Lewis (chrlewis);
>ccielab@groupstudy.com
>Subject: Re: LAB study guide
>
>Okay, question is regarding redistribution,
>
>OSPF <-> EIGRP (no filtering required per Chris)
>For the specific case I mention, yes
>OSPF <-> ISIS (my guess is you need something on the ISIS side?)
>CL: If you put distance ospf external 180 on both redistribution points
>for my case described above, that is all that is necessary
>OSPF <-> RIP (my guess is you need something on the RIP side?)
>CL: again for the specific case of 2 mutual redistribution points
>between two domains, you can get away with distance ospf external 180 on
>both routers
>EIGRP <-> RIP (my guess is you need something on the RIP side?)
>CL: with this pair, the EIGRP external concepts takes care of things so
>nothing additional is necessary
>EIGRP <-> ISIS (my guess is you need something on the ISIS side?)
>CL: again the EIGRP external metric values takes care of things.
>
>CL: The only difficult one is ISIS to RIP. That requires route
>filtering.
>
>Without using extensive filtering on the subnets, how does one prevent
>route feedbacks?
>
>Thanks
>
> >From: "Joe Rinehart" <jjrinehart@hotmail.com>
> >To: "cacca mucca"
> ><caccamucca@hotmail.com>,<chrlewis@cisco.com>,<ccielab@groupstudy.com>
> >Subject: Re: LAB study guide
> >Date: Sat, 16 Jul 2005 15:00:59 -0700
> >
> >Can you give me the scenario? There are several ways to go about that
> >and I would need a context....
> >
> >Joe Rinehart
> >CCIE #14256, CCNP, CCDP
> >Data Network Consultant
> >AT&T Pacific Northwest Enterprise Markets
> >----- Original Message -----
> >From: "cacca mucca" <caccamucca@hotmail.com>
> >To: <jjrinehart@hotmail.com>; <chrlewis@cisco.com>;
> ><ccielab@groupstudy.com>
> >Sent: Friday, July 15, 2005 7:27 PM
> >Subject: Re: LAB study guide
> >
> >
> > > Can you provide us with an example of the "distance ospf external to
> >stop
> > > routes feeding back" ?
> > >
> > > Thanks
> > >
> > > >From: "Joe Rinehart" <jjrinehart@hotmail.com>
> > > >Reply-To: "Joe Rinehart" <jjrinehart@hotmail.com>
> > > >To: "Chris Lewis (chrlewis)" <chrlewis@cisco.com>,
> ><ccielab@groupstudy.com>
> > > >Subject: Re: LAB study guide
> > > >Date: Fri, 15 Jul 2005 08:45:08 -0700
> > > >
> > > >Agreed on the redistribution answers. There are several ways to
> > > >answer something, especially since the real test was whether or not
>
> > > >ot
> >achieved
> > > >the
> > > >desired result.....
> > > >
> > > >----- Original Message -----
> > > >From: "Chris Lewis (chrlewis)" <chrlewis@cisco.com>
> > > >To: "Joe Rinehart" <jjrinehart@hotmail.com>;
> > > ><ccielab@groupstudy.com>
> > > >Sent: Friday, July 15, 2005 8:38 AM
> > > >Subject: RE: LAB study guide
> > > >
> > > >
> > > >My opinion, FWIW is that they both have a lot of value to offer,
> > > >DoiT more for the routing scenarios, Internetworkexpert more for
> > > >the
> >security
> > > >and services side.
> > > >
> > > >I would add though that I often created simpler solutions to the
> > > >NMC answer keys, particularly regarding the redistribution
> > > >scenarios. I found it easier to use things like distance ospf
> > > >external to stop
> >routes
> > > >feeding back, rather than setting up lots of specific route
>filters.
> > > >
> > > >-----Original Message-----
> > > >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> > > >Behalf Of Joe Rinehart
> > > >Sent: Friday, July 15, 2005 10:27 AM
> > > >To: ccielab@groupstudy.com
> > > >Subject: Re: LAB study guide
> > > >
> > > >Well I used the DoIT lab workbook and had great results, what
> > > >exactly was out in left field? The thing that drove me crazy was
> > > >redistribution, DoIT would have at least three to four
> > > >redistribution points on each lab and you had to be really really
> > > >careful about how
> >you
> > > >filtered....
> > > >
> > > >Joe Rinehart
> > > >CCIE #14256, CCNP, CCDP
> > > >Data Network Consultant
> > > >AT&T Pacific Northwest Enterprise Markets
> > > >----- Original Message -----
> > > > > On 7/14/05, cacca mucca <caccamucca@hotmail.com> wrote:
> > > > > > I'm using the DOiT lab and it is out in the left field. I
> > > > > > should have
> > > >bought
> > > > > > the InterNetwork Expert. I even had an upgrade coming, but
> > > > > > went
> >with
> > > >DOiT.
> > > > > > Kicking myself now.
> > > > > >
> > > > > > Just my 2 cents
> > > > > >
> > > > > > >From: "Hooman Parta" <hooman@voipsol.com>
> > > > > > >Reply-To: "Hooman Parta" <hooman@voipsol.com>
> > > > > > >To: <ccielab@groupstudy.com>
> > > > > > >Subject: LAB study guide
> > > > > > >Date: Thu, 14 Jul 2005 10:22:12 -0500
> > > > > > >
> > > > > > >Hi,
> > > > > > >
> > > > > > >I just started my LAB preparation and got my LAB already.
> > > > > > >Does
> >any
> > > > > > >one recommend any of the LAB preparation materials. There are
>
> > > > > > >several
> > > >compaies
> > > > > > >with differnt options. NLI, IPEXPERT, IE, InterNetwork expert
>
> > > > > > >and much more.
> > > > > > >
> > > > > > >I know I should look for updated material which reflects the
> > > > > > >IPv6 and
> > > >12.2T
> > > > > > >but which one do you think is better to start?
> > > > > > >
> > > > > > >Thanks,
> > > > > > >Hooman Parta
> > > > > > >
> > > > > >
> > >___________________________________________________________________
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> > > > > >
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> > > > >
> > > > >
> >______________________________________________________________________
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