From: John Kaberna (jkaberna@xxxxxxxxxxxx)
Date: Sun May 20 2001 - 02:12:38 GMT-3
Ravi, I didn't really want to go in to the entire lab but here is the
explanation. You are correct in your 3 statements by the way.
For step 8 to work you will need the hello interval as well as a neighbor
statement. You will need to set the DR priority as well. If the hub router
becomes the DR before setting priority this will work until it gets
rebooted. Once it reboots one of the spokes will take over. However, as
long as you set priority zero on the spokes or a higher priority on the hub
your fine.
Step 11 could have been solved by putting the frame maps for all the spokes
on each router. However, you were specifically not allowed to do this which
is why they chose policy routing.
John Kaberna
CCIE #7146
NETCG Inc
www.netcginc.com
(415) 750-3800
Fax: 750-3900
----- Original Message -----
From: "Ravi" <s_ravichandran@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Saturday, May 19, 2001 9:50 PM
Subject: Re: Redistributing OSPF into IGRP - Policy routing
> John Kaberna
>
> Can you confirm this.
>
> 1) The lab won't work even with ip ospf network command (as this sets only
> the timer to establish neighbor)
> 2) Instead of using the ip ospf command we could set the timer manually.
(as
> this is not allowed in this lab)
> 3) Policy routing is the only way to make this lab working( as frame map
> also allowed.)
>
> Ravi
>
>
> ----- Original Message -----
> From: "John Kaberna" <jkaberna@netcginc.com>
> To: "Roman Rodichev" <rodic000@hotmail.com>; <Martin.Duggan@ntl.com>;
> <ccielab@groupstudy.com>
> Sent: Sunday, May 20, 2001 12:20 AM
> Subject: Re: Redistributing OSPF into IGRP - Policy routing
>
>
> > Before any one goes on and on about this and the fact that I didn't
> mention
> > neighbor statements and DR elections and all that is because we are only
> > talking about the confusion between frame maps, policy routing, and ip
> ospf
> > network commands not the entire steps to make this whole thing work.
> >
> > John Kaberna
> > CCIE #7146
> > NETCG Inc
> > www.netcginc.com
> > (415) 750-3800
> > Fax: 750-3900
> >
> >
> > ----- Original Message -----
> > From: "Roman Rodichev" <rodic000@hotmail.com>
> > To: <jkaberna@netcginc.com>; <Martin.Duggan@ntl.com>;
> > <ccielab@groupstudy.com>
> > Sent: Saturday, May 19, 2001 9:02 PM
> > Subject: Re: Redistributing OSPF into IGRP - Policy routing
> >
> >
> > > John, you are ccie, aren't you? No offense, but this is like the
basics
> of
> > > OSPF.
> > >
> > > http://www.cisco.com/warp/public/104/3.html#11.2.1
> > >
> > > "OSPF point-to-multipoint works by exchanging additional link-state
> > updates
> > > that contain a number of information elements that describe
connectivity
> > to
> > > the neighboring routers."
> > >
> > > or here is the quote from the Q&A forum on TAC:
> > >
> > > "Configuring nonbroadcast multiaccess networks as either broadcast
> > > or non-broadcast assumes that there are virtual circuits from every
> > > router to every router or fully meshed network. This is not true for
> > > cases where you have cost constraints or when you have only a
partially
> > > meshed network. In these cases, you can configure the OSPF network
type
> > > as a point-to-multipoint network. Routing between two routers that are
> > > not directly connected will occur through a router that has virtual
> > > circuits to the routers that are not directly connected."
> > >
> > > Try using "ip ospf network broadcast" and then "ip ospf network
> > > point-to-multipoint", and notice the /32 routes. This command is not
> just
> > > about timers. Can some one back me up?
> > >
> > >
> > > >From: "John Kaberna" <jkaberna@netcginc.com>
> > > >To: "Roman Rodichev" <rodic000@hotmail.com>, <Martin.Duggan@ntl.com>,
> > > ><ccielab@groupstudy.com>
> > > >Subject: Re: Redistributing OSPF into IGRP - Policy routing
> > > >Date: Sat, 19 May 2001 20:48:59 -0700
> > > >
> > > >Sorry Roman but your wrong. The ip ospf network command only sets
the
> > > >timers. Go look it up.
> > > >
> > > >John Kaberna
> > > >CCIE #7146
> > > >NETCG Inc
> > > >www.netcginc.com
> > > >(415) 750-3800
> > > >Fax: 750-3900
> > > >
> > > >
> > > >----- Original Message -----
> > > >From: "Roman Rodichev" <rodic000@hotmail.com>
> > > >To: <jkaberna@netcginc.com>; <Martin.Duggan@ntl.com>;
> > > ><ccielab@groupstudy.com>
> > > >Sent: Saturday, May 19, 2001 8:38 PM
> > > >Subject: Re: Redistributing OSPF into IGRP - Policy routing
> > > >
> > > >
> > > > > I think Step 8 (cant use ip ospf network) is solved by policy
> routing.
> > > > >
> > > > > Frame maps are not needed for the routing to work, "ip ospf
network"
> > > >would
> > > > > do frame map's job.
> > > > >
> > > > > >From: "John Kaberna" <jkaberna@netcginc.com>
> > > > > >To: "Roman Rodichev" <rodic000@hotmail.com>,
> <Martin.Duggan@ntl.com>,
> > > > > ><ccielab@groupstudy.com>
> > > > > >Subject: Re: Redistributing OSPF into IGRP - Policy routing
> > > > > >Date: Sat, 19 May 2001 20:27:46 -0700
> > > > > >
> > > > > >I think you are getting step 8 and step 11 confused.
> > > > > >
> > > > > >Step 8 (cant used ip ospf network) - solved by used ip ospf
> > > >hello-interval
> > > > > >
> > > > > >Step 11 (cant use 2 frame maps on the spokes) - solved by using
> > policy
> > > > > >routing
> > > > > >
> > > > > >John Kaberna
> > > > > >CCIE #7146
> > > > > >NETCG Inc
> > > > > >www.netcginc.com
> > > > > >(415) 750-3800
> > > > > >Fax: 750-3900
> > > > > >
> > > > > >
> > > > > >----- Original Message -----
> > > > > >From: "Roman Rodichev" <rodic000@hotmail.com>
> > > > > >To: <Martin.Duggan@ntl.com>; <ccielab@groupstudy.com>
> > > > > >Sent: Saturday, May 19, 2001 7:51 PM
> > > > > >Subject: RE: Redistributing OSPF into IGRP - Policy routing
> > > > > >
> > > > > >
> > > > > > > People, am I being stupid? I will take a look at that lab on
> > > >Tuesday.
> > > >I
> > > > > > > clearly remember that they explicitly said not to use "ip ospf
> > > >network"
> > > > > > > statement.
> > > > > > >
> > > > > > > Yes, you guys are right that we weren't allowed to use "frame
> map"
> > > > > > > statements on the spokes. And it's ok. That was not the point
of
> > the
> > > > > >lab.
> > > > > > > The point was that we couldn't use "ip ospf network
multipoint"
> > > > > >statement,
> > > > > > > which would fix the entire scenario by creating /32 routes on
> the
> > > >spokes
> > > > > > > pointing to the hub. So since we couldn't do it, we had to
> create
> > > >policy
> > > > > > > routing that would send traffic to the hub manually.
> > > > > > >
> > > > > > > Am I right?
> > > > > > >
> > > > > > >
> > > > > > > >From: Martin Duggan <Martin.Duggan@ntl.com>
> > > > > > > >Reply-To: Martin Duggan <Martin.Duggan@ntl.com>
> > > > > > > >To: ccielab@groupstudy.com
> > > > > > > >Subject: RE: Redistributing OSPF into IGRP - Policy routing
> > > > > > > >Date: Sat, 19 May 2001 21:40:14 +0100
> > > > > > > >
> > > > > > > >Hi Roman
> > > > > > > >
> > > > > > > >My understanding of Lab1 was that you policy route as you are
> not
> > > > > >permitted
> > > > > > > >to add multiple frame relay map statements from spoke to
spoke,
> > you
> > > > > >policy
> > > > > > > >route so that the next hop is actually your hub ( when
> attempting
> > > >to
> > > > > >reach
> > > > > > > >a
> > > > > > > >spoke from a spoke )the hub is obviously aware of all spokes.
> > > > > > > >
> > > > > > > >Martin
> > > > > > > >
> > > > > > > >-----Original Message-----
> > > > > > > >From: Roman Rodichev [mailto:rodic000@hotmail.com]
> > > > > > > >Sent: 19 May 2001 21:13
> > > > > > > >To: kenyeo@email.com; ccielab@groupstudy.com
> > > > > > > >Subject: Re: Redistributing OSPF into IGRP - Policy routing
> > > > > > > >
> > > > > > > >
> > > > > > > >Ken, policy routing should be used when you can't achieve
> certain
> > > >task
> > > > > >with
> > > > > > > >the routing protocol you have or WAN technology you are
using.
> > And
> > > >of
> > > > > > > >course, when you are asked to use it. Let's say you have
> > multipoint
> > > > > > > >frame-relay, and you can't use "ip ospf network" statement.
The
> > > >only
> > > > > >way
> > > > > >to
> > > > > > > >achieve routing between FR spokes is to use policy-routing.
> > > > > > > >
> > > > > > > >by the way, this is from Lab1 of ccbootcamp, so I'm not
> violating
> > > >NDA.
> > > > > >NDA
> > > > > > > >is f...ing scary nowadays
> > > > > > > >
> > > > > > > >
> > > > > > > > >From: "Ken Yeo" <kenyeo@email.com>
> > > > > > > > >Reply-To: "Ken Yeo" <kenyeo@email.com>
> > > > > > > > >To: <ccielab@groupstudy.com>
> > > > > > > > >Subject: Redistributing OSPF into IGRP - Policy routing
> > > > > > > > >Date: Sat, 19 May 2001 12:59:50 -0500
> > > > > > > > >
> > > > > > > > >Is policy routing allowed for the lab?
> > > > > > > > >
> > > > > > > > >The reason I ask is because policy routing essentially
bypass
> > > >routing
> > > > > > > >table
> > > > > > > > >and it behave like static route, only it depends on source
> > > >address
> > > > > > > >instead
> > > > > > > > >of destination address.
> > > > > > > > >
> > > > > > > > >Policy routing can solve a lot of problem, especially
> > > >redistributing
> > > > > >VLSM
> > > > > > > > >OSPF routes into IGRP with same major network.
> > > > > > > > >
> > > > > > > > >What is your thought?
> > > > > > > > >
> > > > > > > > >Thanks!
> > > > > > > > >
> > > > > > > > >Ken Yeo
> > > > > > > > >**Please read:http://www.groupstudy.com/list/posting.html
> > > > > > >
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