From: kenairs (kenairs@xxxxxxxxxxx)
Date: Fri Oct 05 2001 - 12:33:03 GMT-3
Hi ,
So , what should be the workaround if i am using 12.1T and higher ?
Tks
----- Original Message -----
From: Erick B. <erickbe@yahoo.com>
To: Batman <rschotz@quiknet.com>; Michael Snyder <msnyder@ldd.net>;
<ccielab@groupstudy.com>; kenairs <kenairs@hotmail.com>
Sent: Friday, October 05, 2001 11:37 AM
Subject: Re: OSPF redis conn
> FYI,
>
> This 'workaround' doesn't work in 12.1T and higher
> anymore.
>
> With 12.1 mainline and below *any* routes can be
> redistributed into OSPF even if they are part of OSPF
> already. In 12.1T and higher if that network/mask is
> part of OSPF already it won't be redistributed. 12.1T
> is correct behavior and earlier versions were
> incorrect. I checked with Cisco on this as there were
> no docs/release notes mentioning this behavior change.
> They are updating the docs.
>
> --- Batman <rschotz@quiknet.com> wrote:
> > this is excellent insite - good work around tricks
> > for the lab
> >
> > I think the type 5 lsa & type 2 lsa will cause ospf
> > db fluctuations though -
> > a similar config caused an isdn ospf demand circuit
> > to bounce continuously
> > in another lab CCIE bootcamp 8) - this was discussed
> > in a previous string in
> > this group.
> >
> > somethin to be aware of at lab time.
> >
> > ----- Original Message -----
> > From: "Michael Snyder" <msnyder@ldd.net>
> > To: <ccielab@groupstudy.com>; "kenairs"
> > <kenairs@hotmail.com>
> > Sent: Thursday, September 20, 2001 9:00 AM
> > Subject: Re: OSPF redis conn
> >
> >
> > > Both as a internal route and an external route.
> > Thought I think only one
> > > will show up in the routing table on the router
> > you are on.
> > >
> > > Do a show ip ospf data, you should see network lsa
> > for 192.168.1.0 and
> > also
> > > a type 5 lsa for it.
> > >
> > > BTW, this is both a good thing and a bad thing.
> > If you need to summarize
> > a
> > > route, this is a very handy thing to do. To
> > summarize any route in OSPF
> > you
> > > need a type 5 external lsa (seed) on a ASBR. The
> > summary command will
> > grow
> > > the (seed) lsa to any size mask you need.
> > >
> > > Funny, I didn't think of it before, but you use
> > the redistributed
> > connected
> > > command to plant a seed (external type 5 lsa), and
> > the summary command to
> > > grow it.
> > >
> > > Also if you are not allowed to use redistributed
> > connected to do this, you
> > > can do the same thing with another ospf process.
> > On the second ospf
> > process
> > > just add the one interface you need, then you must
> > set the selected
> > > interface to passive, then redistribute the second
> > ospf process into the
> > > first. You'll get the single type 5 lsa you need.
> > >
> > > Back to your example, the bad thing is you also
> > redistributed ALL
> > connected
> > > interfaces into OSPF. That's a lot of ghost
> > (extra) lsa 5's introduced
> > into
> > > the routing process. Don't do this in the LAB!
> > >
> > > Much better to use a route map to choose which
> > connected interfaces to
> > > insert as LSA 5's.
> > >
> > > The Below route map was posted by
> > SFeldberg@edeltacom.com earlier this
> > week.
> > > Very handy.
> > >
> > > ------------cut----------------
> > >
> > > interface Loopback0
> > > ip address 152.1.11.1 255.255.255.240
> > > no ip directed-broadcast
> > > !
> > > router ospf 1
> > > redistribute connected subnets route-map Loop0
> > > !
> > > route-map Loop0 permit 10
> > > match interface Loopback0
> > >
> > > ------------cut----------------
> > >
> > > ----- Original Message -----
> > > From: "kenairs" <kenairs@hotmail.com>
> > > To: <ccielab@groupstudy.com>
> > > Sent: Thursday, September 20, 2001 9:54 AM
> > > Subject: OSPF redis conn
> > >
> > >
> > > > Hi ,
> > > > I have a router running ospf . i wanted a
> > specific route to appear as
> > > External
> > > > . Below is my partial config.
> > > >
> > > > interface ethernet 0
> > > > ip add 192.168.1.1 255.255.255.0
> > > >
> > > > router ospf
> > > > network 192.168.1.0 0.0.0.255 area 1
> > > > redistributed connected subnets metric 10
> > > >
> > > > How will the 192.168.1.1 being advertied ?
> > > > As inter area route or external route
> > redistributed into OSPF ?
> > > >
> > > > tks
> > > > **Please
> > read:http://www.groupstudy.com/list/posting.html
> > > **Please
> > read:http://www.groupstudy.com/list/posting.html
> > **Please
> > read:http://www.groupstudy.com/list/posting.html
> >
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