From: Michel Grossenbacher (pashtuk@gmail.com)
Date: Fri May 16 2008 - 09:36:45 ART
Never heard about that this will work and my test environment tells me the
same no OSPF Adj without the Neighbor statement on the hub Router.
I guess a show ip ospf interface serial1/0 shows them as non-broadcast also?
On 16/05/2008, Chuck Ryan (chryan) <chryan@cisco.com> wrote:
>
> Here are my configurations, nothing fancy, all pretty basic.
>
> ****** R1 *******
>
> interface serial1/0
> ip address 10.0.0.1 255.0.0.0
> encapsulation frame-relay
> no fair-queue
> serial restart-delay 0
> no arp frame-relay
> frame-relay map ip 10.0.0.3 103
> frame-relay map ip 10.0.0.2 102
> no frame-relay inverse-arp
>
>
> router ospf 1
> network 0.0.0.0 255.255.255.255 area 0
>
>
> ****** R2 *******
>
> interface serial1/0
> ip address 10.0.0.2 255.0.0.0
> encapsulation frame-relay
> no fair-queue
> serial restart-delay 0
> no arp frame-relay
> frame-relay map ip 10.0.0.3 201
> frame-relay map ip 10.0.0.1 201
> no frame-relay inverse-arp
>
>
> router ospf 1
> network 0.0.0.0 255.255.255.255 area 0
>
>
> ****** R3 *******
>
> interface serial1/0
> ip address 10.0.0.3 255.0.0.0
> encapsulation frame-relay
> no fair-queue
> serial restart-delay 0
> no arp frame-relay
> frame-relay map ip 10.0.0.1 301
> frame-relay map ip 10.0.0.2 301
> no frame-relay inverse-arp
>
>
> router ospf 1
> network 0.0.0.0 255.255.255.255 area 0
>
> Thanks,
>
> Chuck
>
> ------------------------------
> *From:* Michel Grossenbacher [mailto:pashtuk@gmail.com]
> *Sent:* Friday, May 16, 2008 6:41 AM
> *To:* Chuck Ryan (chryan)
> *Cc:* Hong Chan; Cisco certification
> *Subject:* Re: ospf network type non-broadcast
>
>
> Hi Chuck
> Can you provide your FR and OSPF configs for all three Routers?
> best regards
>
> Michel
>
>
> On 16/05/2008, Chuck Ryan (chryan) <chryan@cisco.com> wrote:
>>
>> Hi Hong,
>>
>> I dont have any problem establishing adjacencies with or without the
>> neighbor statements configured under the ospf routing process. That is
>> what I don't understand. I thought with a network type of non-broadcast,
>> you have to manually define your neighbors on your DR in order to
>> establish adjacencies. As it turns out for me, that's not the case. I
>> can establish ospf adjacencies with the neighbor statements AND without
>> the neighbor statements.
>>
>> I'm trying to find out why this works with no neighbor statements
>> configured, and no broadcast statement at the end of my frame-relay map
>> statements.
>>
>> Thanks,
>>
>> Chuck
>>
>> ________________________________
>>
>> From: Hong Chan [mailto:howard.chan34@gmail.com]
>> Sent: Friday, May 16, 2008 12:50 AM
>> To: Chuck Ryan (chryan)
>> Subject: Re: ospf network type non-broadcast
>>
>>
>> Where is your DR? Is that on the r1?
>> Try to add "ip ospf priority 0" on r2 & r3, add neighbor statement on
>> r1. If still not able to form neighborship, try debug to see how's the
>> hello packet talking.
>>
>>
>> 2008/5/16 Chuck Ryan (chryan) <chryan@cisco.com>:
>>
>>
>> Hi GS,
>>
>> I have a question about the ospf network type, non-broadcast. In
>> a
>> simple 3 router pod, with r1 being the hub and r2 and r3 being
>> the
>> spokes, I've been reading how you need to configure a neighbor
>> statement
>> under r1 in order to establish ospf adjacencies with r2 and r3.
>>
>> When I lab it up and try it, it does work. What I have also
>> found out,
>> is that no neighbor statement is necessary in order to get ospf
>> adjacencies up between r1 and r2, and r1 and r3. Frankly, I
>> don't see
>> the difference whether I manually define neighbors or not, the
>> results
>> appear to be the same.
>>
>> Can someone explain this behavior? I thought that if you do not
>> specify
>> the neighbor statement, then the adjacencies will not come up,
>> but that
>> doesn't appear to be the case. Also, I am not using the
>> "broadcast"
>> keyword on my frame-relay map statements.
>>
>> Thanks,
>>
>> Chuck
>>
>>
>>
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