From: Bill Dellamar (wdellamar@xxxxxxxxx)
Date: Mon Jan 22 2001 - 15:12:28 GMT-3
I thought the requirement was to advertise the default
only if r2 was available, the always command will
cause the router to "always" generate a default no
matter what the state of r2.
Bill
--- Mike Schlenger <mschlenger@n2nsolutions.com>
wrote:
> Well, his OSPF router wont advertise himself as the
> default route unless he
> includes the "always" option on the
> default-information originate command.
> (assuming no static default has been configured.)
>
> my 2cents
>
>
> -----Original Message-----
> From: Mike McSpedon [mailto:mike@mentortech.com]
> Sent: Monday, January 22, 2001 11:41 AM
> To: Bill Dellamar; ccielab@groupstudy.com
> Subject: Re: OSPF Redistribution Challenge
>
>
> Can anyone tell me what is wrong with Bill's answer?
>
> -Mike
>
> At 09:19 AM 1/22/01 -0800, Bill Dellamar wrote:
> >I don't have a rack to test this, but this would be
> my
> >first guess.
> >
> >How about this on R3:
> >router ospf 1
> >default-information-originate route-map gen-default
> >!
> >route-map gen-default permit 10
> >match ip address 1
> >!
> >access-list 1 permit 135.5.192.0 0.0.0.3
> >
> >Bill
> >
> >--- Mike McSpedon <mike@mentortech.com> wrote:
> > > Here's a challenge:
> > >
> > > r1e0===e0r2s0====s1r3s0=======s1r4e0
> > >
> > > r1e0: 170.10.1.1 /24
> > > r2e0: 170.10.1.2 /24
> > > r2s0:170.10.255.1 /30
> > > r3s1:170.10.255.2 /30
> > > r3s0: 135.5.192.1 /30
> > > r4s1: 135.5.192.2 /30
> > > r4e0: 135.5.112.0 /24
> > >
> > > Loopbacks:
> > > r3: 192.168.3.1
> > > r4: 192.168.4.1
> > >
> > > 1. Routers 1, 2, and the 3 are routing IP via
> ISIS.
> > > 2. OSPF is running only on the serial link
> between
> > > routers 3 and 4 and on
> > > the Ethernet on r4 (all Area 0).
> > > 3 . Perform mutual redistribution between ISIS
> and
> > > OSPF on r3 .
> > > 4. Advertise a default route to from r3 to r4 if
> > > AND ONLY if r2 is
> > > reachable. Do not use a default route in the
> ISIS
> > > domain. Only advertise
> > > the address above from the ISIS domain to the
> OSPF
> > > domain.
> > >
> > > The answer is on the CD.
> > >
> > > Enjoy!
> > > -Mike
> > >
> > >
>
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