From: D. J. Jones (meganac@xxxxxxxx)
Date: Sun Jan 28 2001 - 19:57:54 GMT-3
What about the requirement of no statics for this particular lab?
----- Original Message -----
From: "fwells12" <fwells12@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Sunday, January 28, 2001 2:37 PM
Subject: Re: Igrp / ospf and redistribution - revisted
> You need to use a network that is not one of the networks in your network
> statements. The network you choose however needs to have a route in your
> route table. You would not need default route to route only within your
own
> domain. The default route is therefore used to get to networks which are
> outside your own domain.
>
> Here's a excerpt I just read on CCO that might help:
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ssr83/rpc_r/53992.h
> tm#xtocid2008054
>
> Picking a Default Route
> When default information is being passed along through the dynamic routing
> protocol, no further configuration is required. The system will
periodically
> scan its routing table to choose the optimal default network as its
default
> route. In the case of RIP and HELLO, there will be only one choice,
network
> 0.0.0.0. In the case of IGRP, there may be several networks that can be
> candidates for the system default. The router uses both administrative
> distance and metric information to determine the default route. The
selected
> default route appears in the gateway of last resort display of the EXEC
> command show ip route.
>
> If dynamic default information is not being passed to the router,
candidates
> for the default route may be specified with the ip default-network
> subcommand. In this usage, ip default-network takes a nonconnected network
> as an argument. If this network appears in the routing table from any
source
> (dynamic or static), then it is flagged as a candidate default route and
is
> subject to being chosen as the default route for the router. Multiple ip
> default-network commands may be given. All candidate default routes, both
> static (that is, flagged by ip default-network) and dynamic, appear in the
> routing table preceded by an asterisk.
>
> Example:
> In the following example, a static route to network 10.0.0.0 is defined as
> the static default route.
>
> ip route 10.0.0.0 131.108.3.4
> ip default-network 10.0.0.0
>
> If the following global configuration command was issued on a router not
> connected to network 129.140.0.0, then the router might choose the path to
> that network as a default route when the network appeared in the routing
> table.
>
> ip default-network 129.140.0.0
>
>
>
>
> ----- Original Message -----
> From: D. J. Jones <meganac@home.com>
> To: Jeremy Gray <jeremy.gray@virgin.net>; <ccielab@groupstudy.com>
> Sent: Sunday, January 28, 2001 1:42 PM
> Subject: Re: Igrp / ospf and redistribution - revisted
>
>
> > I think I understand what you are saying about the ip default-network
> > command, but I'm unclear how it applies here since the only connected
> > network in the igrp domain is 171.68.62.93/26? To me that would imply
the
> > following:
> >
> > router igrp 1
> > network 171.68.0.0
> > !
> > ip classless
> > ip default-network 171.68.0.0
> >
> > This I don't think can work because if router r4 in this example has
other
> > interfaces using addresses from net 171.68.0.0, how would you determine
> > which interface is the default to network 0.0.0.0?
> >
> > Thanks..dj
> >
> >
> >
> > ----- Original Message -----
> > From: "Jeremy Gray" <jeremy.gray@virgin.net>
> > To: <ccielab@groupstudy.com>
> > Sent: Sunday, January 28, 2001 1:08 PM
> > Subject: RE: Igrp / ospf and redistribution - revisted
> >
> >
> > >
> > >
> > > IGRP can be painful if you're used to more complex and forgiving
> > protocols.
> > >
> > > In this instance it needs feeding with a default network. IGRP will
> > > otherwise perform only strict classful lookups.
> > >
> > > ip default-network n.n.0.0
> > >
> > > Caslow recommends this route be a classful subnet 172.16.0.0 for
> example.
> > > THe route is then tagged in show ip route as a 'candidate default
route'
> > > using an *.
> > >
> > > Your IGRP routers should then follow this network as though it where
> > 0.0.0.0
> > >
> > > Jeremy.
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > > D. J. Jones
> > > Sent: 28 January 2001 17:57
> > > To: Nigel Taylor; Connary, Julie Ann
> > > Cc: ccielab@groupstudy.com
> > > Subject: Re: Igrp / ospf and redistribution - revisted
> > >
> > >
> > > Are you using the redistribute subnets under the ospf process for
igrp?
> > >
> > > ----- Original Message -----
> > > From: "Nigel Taylor" <nigel_taylor@hotmail.com>
> > > To: "Connary, Julie Ann" <jconnary@cisco.com>
> > > Cc: <ccielab@groupstudy.com>
> > > Sent: Wednesday, January 24, 2001 7:48 AM
> > > Subject: Igrp / ospf and redistribution - revisted
> > >
> > >
> > > > Julie Ann,
> > > > Here's the original mesage/layout of the scanerio I
> > posted
> > > > to
> > > > the group. The lab also specified to only redistribute the OSPF
> domain
> > > > routes into the IGRP domain. I do have "red ospf xx metric x x x
> x
> > > x"
> > > > under the IGRP process. Now I do get a 172.16.0.0/16 into the IGRP
> > > > domain but I cannont ping all interfaces from the IGRP
> > > > domain(another requirement).
> > > >
> > > > Now the lab also specifies "NO Statics". I'm also working on a
> > > > OSPF - EIGRP - IGRP redistribution lab. In my case the lab required
> > > > you to only use 172.17.59.x for the EIGRP and OSPF domains.
> > > > The requirement called for the IGRP domain that is connected to
> > > > use 171.68.62.93 w/ a 26 bit mask. Let's try some ASCII art.....
> > > >
> > > >
> > > > EIGRP(E1)------R3 -------(S1)---(FR, Area 0)---R2 -----R1-(Area 1)
> > > > / \
> > > > / \
> > > > IGRP OSPF(Area 2)
> > > > (E0) (E2)
> > > > / \
> > > > R4 R5
> > > > \
> > > > (Area 3)
> > > >
> > > >
> > > > Ok, I've got the EIGRP(E1) using 172.17.59.0/29. The OSPF domain is
> > > > using 172.17.59.48/28(S1) and (E2) using 172.17.59.68/30. As I said
> the
> > > > IGRP(E0) is assigned 171.68.62.93 w a /26 on R3's E0 interface.
I've
> > > > read through the list thread on this but I'm still unable to see a
> > route
> > > > to the OSPF from the IGRP domain. I'm so tired at this point can
> > > > anyone shed some light on this for me...
> > > >
> > > > TIA
> > > >
> > > > Nigel...
> > > >
> > > >
> > > >
> > > >
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