Mohamed,
Area range summarizes into the area 0, and the OSPF summary command summarizes routes
coming into the OSPF domain from other
protocols (e.g. you igrp domain). Neither of these will summarize outgoing routes from
a /28 area 0 though.
Is this your setup?
R2------Frame Cloud -----R3-------------R4-----------R5
OSPF Area 0 OSPF Area 3 IGRP
With the redistribution taking place at R4, the /28 bit network in area 0 can not be
summarized. You will have to use the ip
default-network command to reach those addresses.
Cheers,
Greg
Greg Schmitt
Internetwork Solutions Engineer
ThruPoint, Inc. (formerly Total Network Solutions)
Voice: 410-349-9772
Cell: 443-822-5183
Pager: 888-773-0423 or [EMAIL PROTECTED]
e-mail: [EMAIL PROTECTED]
-----Original Message-----
From: Mohamed Heeba [mailto:[EMAIL PROTECTED]]
Sent: Sunday, December 31, 2000 3:00 AM
To: 'Schmitt, Greg'
Cc: '[EMAIL PROTECTED]'; '[EMAIL PROTECTED]'
Subject: RE: OSPF summary problem!
hi Greg;
thx for your help , but i guess the problem is something else , the OSPF
domain is supposed to send a route to the IGRP with 24 bit mask , which
never happened
the route exits in the OSPF as 28 bit mask subnet , so it is natural that it
will not be propagated to the IGRP domain unless I summarize at the 24 bit .
i did already this summarization , i tried area range command to summarize
from area 0 to the others , i tried aslo the summary-address at the ASBR
router , still the route
didnt propagate ...and the weired part is there is another subnet in the
OSPF domain which is 26 bit ,i summarized it and it propagate naturally to
the IGRP .
anyone has any comment??
thx
> -----Original Message-----
> From: Schmitt, Greg [SMTP:[EMAIL PROTECTED]]
> Sent: Saturday, December 30, 2000 1:14 PM
> To: 'Mohamed Heeba'
> Subject: RE: OSPF summary problem!
>
> Hi Mohamed,
>
> On way around the variable length versus fixed length redistribution
> problem with igrp is through the use of the 'ip
> default-network' command.
>
> In your case, look at the routing table on r5, and find a classful route
> that is being redistributed into igrp on r4. That
> is, a route in the routing table that is defined at the default boundary
> (e.g. 137.225.0.0). Once you've found that route
> (you may have to create something on routers r1, r2, or r3) type the ip
> default-route xxx.xxx.xxx.xxx command on r5
> (replacing the xxx's with the actual route).
>
> This acts like a static route, but (may) gets you around the "can't use
> any static routes" restriction.
>
> Hope this helps!
>
> Happy New Year!
>
> Greg
>
> Greg Schmitt
>
> Internetwork Solutions Engineer
> ThruPoint, Inc. (formerly Total Network Solutions)
> Voice: 410-349-9772
> Cell: 443-822-5183
> Pager: 888-773-0423 or [EMAIL PROTECTED]
> e-mail: [EMAIL PROTECTED]
>
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> Mohamed Heeba
> Sent: Friday, December 29, 2000 1:30 PM
> To: '[EMAIL PROTECTED]'
> Cc: '[EMAIL PROTECTED]'
> Subject: OSPF summary problem!
>
>
> i was trying the Fatkid 501 redistribution lab when i got this problem
>
> the lab is 5 routers , 3 of them (R1,R2,R3) are in area 0 over Frame
> relay
> with a subnet of 28 bit mask
> one of this routers ( R3) are connected to another router ( R4) forming
> area
> 3 on the link between them , and another area on its loopback interface
> (area 2 )
>
> now R4 is connected to another router (R5) and the link between them is
> running IGRP with subnet of mask 24 .......i hope this is clear to you
>
> the problem is
> i have formed a virtual link between R4 and R3 and things looked fine to
> me
> BUT when i redistribute the OSPF to the IGRP , the 28 bit subnet never
> appeared to R5
> i summarized the network , trying the AREA range command at R3 , then at
> R4
> i tried also the summary-address at R4....but the subnet never appeared
> in
> R5
> although some other networks ( of 26 bit masks) appreared fine when i
> summarized them at 24 bit boundry
> can anyone knows where is the problem ??
>
>
> NOTE:when i configured the frame relay interfaces as point-to-mulitpoint ,
> only the 32 address appreared in the routing tables , when i changed the
> network type to broadcast type , the 28 bit subnet appeared ..but still it
> didnt go to the far IGRP router ...
> wat is the problem ????
>
>
>
> Mohamed HEEBA
>
>
>
>
>
>
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