From: Cheng Qian (toqian@cisco.com)
Date: Wed Sep 25 2002 - 00:13:05 GMT-3
Hi All,
I configured the ip ospf demand circuit on R1; when the Frame Relay link is
down for R1, the interesting packet(IP) will bring up the isdn link to R9.
And I also configured both the Bri interfaces for R1 and R9 in the same
ospf area(area 19) and also configured on peer neighbor-route under both
BRI interfaces and the network type for both BRI is point-to-point.
R9 has a mutual redistribution between OSPF and IGRP. Before the R1's FR
link is down, everything is fine. Afer the link is down, the isdn is
brought up successfully and all the B channels are up. When I showed ip
ospf int bri0/0 on R1, it is in down state and there is no ospf adjacency
established. Here is my configuration. Please comment. Thanks!
R1
....
interface BRI0/0
ip address 172.168.65.6 255.255.255.0
encapsulation ppp
ip ospf network point-to-point
ip ospf demand-circuit
dialer idle-timeout 100 either
dialer map ip 172.168.65.5 7777771
dialer-group 1
isdn switch-type basic-ni
isdn spid1 777888101
no peer neighbor-route
...
interface Serial0/0
ip address 172.168.100.6 255.255.255.0
encapsulation frame-relay
ip ospf network point-to-multipoint
no fair-queue
frame-relay map ip 172.168.100.5 605 broadcast
frame-relay lmi-type cisco
!
...
router ospf 1
router-id 1.1.1.1
log-adjacency-changes
area 10 virtual-link 9.9.9.9
network 172.168.60.1 0.0.0.0 area 6
network 172.168.65.0 0.0.0.255 area 19
network 172.168.100.0 0.0.0.255 area 10
...
dialer-list 1 protocol ip permit
R1#sh ip ospf int bri0/0
BRI0/0 is up, line protocol is up (spoofing)
Internet Address 172.168.65.6/24, Area 19
Process ID 1, Router ID 1.1.1.1, Network Type POINT_TO_POINT, Cost: 1562
Configured as demand circuit.
Run as demand circuit.
DoNotAge LSA allowed.
Transmit Delay is 1 sec, State DOWN,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:20 (using PollInterval of 40)
R1#sh dialer
BRI0/0 - dialer type = ISDN
Dial String Successes Failures Last DNIS Last status
7777771 5 0 00:20:48 successful
0 incoming call(s) have been screened.
0 incoming call(s) rejected for callback.
BRI0/0:1 - dialer type = ISDN
Idle timer (100 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is idle
BRI0/0:2 - dialer type = ISDN
Idle timer (100 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is idle
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
R9
...
interface BRI0/0
ip address 172.168.65.5 255.255.255.0
encapsulation ppp
ip ospf network point-to-point
dialer idle-timeout 100 either
dialer map ip 172.168.65.6 7778881
dialer-group 1
isdn switch-type basic-ni
isdn spid1 777777101
no peer neighbor-route
...
interface Serial1/0.1 multipoint
ip address 172.168.100.5 255.255.255.0
ip ospf network point-to-multipoint
ip ospf priority 200
frame-relay map ip 172.168.100.3 503 broadcast
frame-relay map ip 172.168.100.6 506 broadcast
...
router ospf 1
router-id 9.9.9.9
log-adjacency-changes
area 10 virtual-link 3.3.3.3
area 10 virtual-link 1.1.1.1
redistribute igrp 2 metric 20 metric-type 1 subnets route-map ospfigp
passive-interface Serial1/0.2
network 137.20.20.10 0.0.0.0 area 0
network 172.168.65.0 0.0.0.255 area 19
network 172.168.100.0 0.0.0.255 area 10
...
dialer-list 1 protocol ip permit
...
R9#sh ip ospf int bri0/0
BRI0/0 is up, line protocol is up (spoofing)
Internet Address 172.168.65.5/24, Area 19
Process ID 1, Router ID 9.9.9.9, Network Type POINT_TO_POINT, Cost: 1562
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:01
Index 1/5, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 0, maximum is 0
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 0, Adjacent neighbor count is 0
Suppress hello for 0 neighbor(s)
Tom
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