Re: ISDN will not stay down

From: Javier Tomé (fjtm@tid.es)
Date: Wed Oct 26 2005 - 11:48:40 GMT-3


Simon,

If you are trying to avoid multicast traffic over the link you can go
with "point-to-multipoint nonbroadcast" network type...

Regards

Javi

kevin gannon wrote:

>It will not suppress the hellos on a non broadcast network type
>see the URL below
>
>http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094a8f.shtml#dcvnc
>
>Regards
>Kevin
>
>On 10/26/05, simon hart <simon@harttel.com> wrote:
>
>
>>Hi all,
>>
>>I have a problem with keeping ISDN in the following configuration. I have
>>created a non-broadcast area between R4 and R5 for Ospf and also create ospf
>>demand circuit on R5, however the circuit never goes down. It seems that
>>demand circuit does not like this typr of config.
>> Any ideas?
>>
>>R5 config
>>
>>interface BRI0/0
>> ip address 129.1.45.5 255.255.255.248
>> ip ospf network non-broadcast
>> ip ospf demand-circuit
>> dialer map ip 129.1.45.4 name Frame_R4 1111
>> dialer redial interval 10 attempts 3
>> dialer-group 1
>> isdn switch-type basic-ni
>> isdn spid1 2122
>>
>>
>>router ospf 100
>> router-id 150.1.5.5
>> log-adjacency-changes
>> network 129.1.45.5 0.0.0.0 area 0
>> network 129.1.54.5 0.0.0.0 area 0
>> network 129.1.58.5 0.0.0.0 area 0
>> network 150.1.5.5 0.0.0.0 area 0
>> neighbor 129.1.45.4
>>
>>
>>R4 config
>>
>>interface BRI0
>> ip address 129.1.45.4 255.255.255.248
>> ip ospf network non-broadcast
>> ip ospf priority 0
>> dialer map ip 129.1.45.5 name Rack1R5 2222
>> dialer-group 1
>> isdn switch-type basic-ni
>> isdn spid1 1211
>>
>>router ospf 100
>> router-id 150.1.4.4
>> log-adjacency-changes
>> network 129.1.45.4 0.0.0.0 area 0
>> network 129.1.46.4 0.0.0.0 area 0
>> network 129.1.54.4 0.0.0.0 area 0
>> network 150.1.4.4 0.0.0.0 area 0
>>
>>BRI0:1 - dialer type = ISDN
>>Idle timer (120 secs), Fast idle timer (20 secs)
>>Wait for carrier (30 secs), Re-enable (15 secs)
>>Dialer state is data link layer up
>>Dial reason: ip (s=129.1.45.4, d=129.1.45.5)
>>Time until disconnect 107 secs
>>Connected to 2222 (Rack1R5)
>>
>>Debug IP routing shows no change of routing updates (hence reconvergence is
>>not keeping the line up)
>>
>>Neighbor is established
>>
>>If I look at the packets I can see that R4 and R5 are exchanging hello
>>packets every 30 seconds.
>>
>>Oct 26 14:24:09.878: IP: s=129.1.45.4 (local), d=129.1.45.5 (BRI0), len 80,
>>sending, proto=89
>>Oct 26 14:24:24.318: IP: s=129.1.45.5 (BRI0), d=129.1.45.4, len 80, rcvd 0,
>>proto=89
>>
>>So I guess the question is does ip ospf demand circuit work when the circuit
>>is configured as non-broadcast??
>>
>>Thanks
>>
>>Simon
>>
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