I agree with the last post. We did this similar simulation in a lab setup for pre-production implementation on our network. NSSA area works great.Keeps LSA type 7's in the NSSA and then if you want you can translate type 7's to type 5 LSA's at the ABR to area 0.0.0.0 Good reference is John T. Moy's OSPF Anatomy of an Internet Routing Protocol and Cisco Press Routing TCP/IP Volume I.John's book gives you the industry standard view of OSPF and the Cisco Press book will give you Cisco specific issues as well. Check out Chapter 9 page 482 in the Cisco book. Hope this helps! Jerrold -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Allen Sent: Thursday, July 12, 2001 8:07 PM To: [EMAIL PROTECTED] Subject: Re: LSA type-5 suppression across OSPF area boundaries?? [7:12218] What about making the area between the ASBR and ABR a not so stubby area (NSSA). If these are Cisco routers you could then use the summary-address command on the ASBR to summarize the external routes. The ABR will then convert the type 7 NSSA LSAs to type 5 LSAs. What do you think.... wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > hi all, > > have a problem that has been nagging at me for a good long time now... > > say you have a pair of ABRs sitting at an OSPF area boundary, and an ASBR is > originating Type-5 LSAs from inside the non-backbone area. Is there an easy > way to suppress the propagation of the type-5s outside the area? I would > have a range statement on the ABRs to advertise the area aggregate, I just > want to suppress the more specifics. > > I have tried using 'distribute-list out ' which would do it for > me, but for some reason IOS won't allow this with OSPF: > > router(config)#router os 1 > router(config-router)#distribute-list 1 out FastEthernet 0/0 > % Interface not allowed with OUT for OSPF > router(config-router)# > > I suppose that allowing this could potentially screw up routing if done > without some care, but JunOS lets you do exactly this sort of thing - you > can produce some wacky policies, but at least you have the option ;-) > > btw - I know I could prolly do this with multiple OSPF instances and > redistribute between them, but I *really* don't want to get into this level > of complexity. > > thanks in advance - this one has been driving me mad > > Andy Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=12235&t=12235 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
