ISDN will not stay down

From: simon hart (simon@harttel.com)
Date: Wed Oct 26 2005 - 11:26:50 GMT-3

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 

--
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.361 / Virus Database: 267.12.5/149 - Release Date: 25/10/2005

This archive was generated by hypermail 2.1.4 : Sun Nov 06 2005 - 22:00:54 GMT-3