You know, Charles, you have a bright future as a Lab Proctor. You definitely have the proper attitude. Chuck www.cl.cncdsl.com/locutus.html Cthulu, CCIE Candidate <[EMAIL PROTECTED]> wrote in message news:8nv8t1$aj8$[EMAIL PROTECTED]... > Hi, all, > > This is a repost...after two days, I have not seen this appear. Apologies > if this is redundant... could be useful info! > > I was dickering around with OSPF (which is not as easy as it looks, > dickering, I mean, not OSPF). I raised some questions to myself, > and posted them to the Cisco TAC about how or whether I could/should mix > point to point and point to multipoint network types over a frame relay > network. The short answer is yes, Cisco answer is "we don't recommend > it.". While you can do it, I agree with Cisco: on a production network, > I would ensure that everything > matched (network types, etc). However, in my lab and in the pursuit of > knowledge, who cares;) > > As always, flames to: [EMAIL PROTECTED] > > Charles > > > > KEY POINT: HELLO! (Hello intervals must match.) Sub-point: this would be > a good exam gotcha, wouldn't it? > > Original Question: > On a frame relay partially meshed network, can I use ip opsf network > point-to-multipoint on the hub router, and ip ospf network point-to-point on > the spokes? > > Additional Info: > I have 3 routers on a frame relay partially meshed network. The hub router, > A, has a link to the spokes, B and C. I am running OSPF over this network. > > > > My question is: > On a frame relay partially meshed network, can I use ip opsf network > point-to-multipoint on the hub router, and ip ospf network point-to-point on > the spokes? > Would this work? Are there any known problems with this? > > > From Cisco TAC: > You need to specify 'ip ospf network point-to-multipoint' on all the routers > for > > this to work. Alternatively, you could use subinterfaces. > > > From Charles Riley: To Cisco TAC > > Thought you guys could use more detail on this; I did some more research on > my own question; here's the answer I was looking for: > > OSPF will work in situation where you have a point to point on one side and > a point to multipoint on the other side IF and only IF: (over a frame relay > network) > > 1. The point to multipoint side can be either a physical or logical > interface; use the ip os network command to set it as such. > > 2. The point to point side must be a point to point subinterface; OSPF will > automatically detect it as such when you add the interface to the OSPF > routing process. > > 3. You must set the Hello intervals to match on both sides. Once you have > done that, this configuration will work. > > As a rule of thumb, ensure that your OSPF network types match on both sides. > This is a Cisco recommendation and is a good one. I had wanted to get > official Cisco verification that you can run OSPF successfully with > mismatched network types as long as the Hello timers matched ONLY on point > to point and point to multipoint types. You can not mix point to > point/point to multipoint with broadcast/nonbroadcast: the former do not > use DRs; the latter do. > > This would be good information to keep int he QA forum. > > Many thanks for your original response. > > Charles > > > > > > > > ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
