From: Merete Asak (merete@xxxxxxxxxxxxxxxxxx)
Date: Tue Mar 05 2002 - 09:17:56 GMT-3
This is my scenario-lab:
R2 is connected to a frame-relay cloud to R3. This connection does also have a
ISDN between them where I have configured ip ospf demand circuit.
R2 is running IGRP as well and there is redistribution between OSPF and IGRP. I
have done no peer neighbour-route on both the bri0 interfaces to make sure that
there will be noe flapping in IGRP. I have done debugging, and IGRP is not
learning any routes as dead while the ospf demand circuit is flapping.
I have checked that all my routers have the demand circuit feature loaded as
well. THe bri0 is a point-to-point so there should not be a problem with
broadcast over the link (I have also seen this in the debug that broadcast is
not brining up the link)
When I debug there is the ospf mulicast address 224.0.0.5 that is brining up
the link. There is no changes in the topology.
The net of the frame-relay network is a /24 and the net for the ISDN is a /30.
I have made a summary-address for this net as a /24 on the R2 so that the
IGRP-part of the network will learn about the ISDN-link.
My R2 Bri0 configuration looks like this:
interface BRI0
ip address 133.3.35.1 255.255.255.252
encapsulation ppp
no ip route-cache
ip ospf message-digest-key 1 md5 cisco
ip ospf demand-circuit
no ip mroute-cache
dialer string 67839066
dialer-group 1
isdn switch-type basic-net3
no peer neighbor-route
no cdp enable
ppp authentication chap callin
ppp chap hostname bjarte
ppp chap password 7 070C285F4D06
dialer-list 1 protocol ip list 102
access-list 102 deny ip any host 255.255.255.255
access-list 102 permit ip any any
Router3 that I'm calling :
interface BRI0
ip address 133.3.35.2 255.255.255.252
no ip directed-broadcast
encapsulation ppp
ip ospf message-digest-key 1 md5 cisco
ip ospf priority 0
dialer-group 1
isdn switch-type basic-net3
no peer neighbor-route
no cdp enable
dialer-list 1 protocol ip permit
Output of debug dialer and debug ip ospf event and lsa generation is:
(133.3.2.0 - loopback net on R2 133.3.3.0 is loopback net on R3)
21:30:08: OSPF: Send with youngest Key 1
21:30:13: OSPF: Rcv hello from 133.3.7.7 area 0 from Serial0.2 133.3.235.1
21:30:13: OSPF: End of hello processing
21:30:17: OSPF: Rcv hello from 133.3.3.3 area 0 from Serial0.2 133.3.235.3
21:30:17: OSPF: End of hello processing
R2#
R2#
21:30:38: OSPF: Send with youngest Key 1
21:30:43: OSPF: Rcv hello from 133.3.7.7 area 0 from Serial0.2 133.3.235.1
21:30:43: OSPF: End of hello processing
21:30:47: OSPF: Rcv hello from 133.3.3.3 area 0 from Serial0.2 133.3.235.3
21:30:47: OSPF: End of hello processing
21:31:03: OSPF: Generate external LSA 133.3.2.0, mask 255.255.255.0, type 5,
age 0, metric 100, seq 0x80000020
21:31:03: OSPF: Send with youngest Key 1
21:31:03: BR0 DDR: ip (s=133.3.35.1, d=224.0.0.5), 160 bytes, outgoing
interesting (list 102)
21:31:03: BR0 DDR: sending broadcast to default destination
21:31:03: BR0 DDR: Dialing cause ip (s=133.3.35.1, d=224.0.0.5)
21:31:03: BR0 DDR: Attempting to dial 67839066 -- failed, not connected
21:31:03: OSPF: Send with youngest Key 1
21:31:04: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0, TEI 83 changed to up
21:31:05: %LINK-3-UPDOWN: Interface BRI0:2, changed state to up
21:31:06: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down
21:31:06: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up
21:31:07: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state
to up
21:31:08: OSPF: Send with youngest Key 1
21:31:08: OSPF: Send with youngest Key 1
21:31:08: BR0 DDR: ip (s=133.3.35.1, d=224.0.0.5), 160 bytes, outgoing
interesting (list 102)
21:31:08: BR0 DDR: sending broadcast to default destination
21:31:12: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 67839066
21:31:13: OSPF: Rcv hello from 133.3.7.7 area 0 from Serial0.2 133.3.235.1
21:31:13: OSPF: End of hello processing
21:31:17: OSPF: Rcv hello from 133.3.3.3 area 0 from Serial0.2 133.3.235.3
21:31:17: OSPF: End of hello processing
21:32:43: OSPF: Rcv hello from 133.3.7.7 area 0 from Serial0.2 133.3.235.1
21:32:43: OSPF: End of hello processing
21:32:47: OSPF: Rcv hello from 133.3.3.3 area 0 from Serial0.2 133.3.235.3
21:32:47: OSPF: End of hello processing
21:33:08: OSPF: Send with youngest Key 1
21:33:13: OSPF: Rcv hello from 133.3.7.7 area 0 from Serial0.2 133.3.235.1
21:33:13: OSPF: End of hello processing
21:33:17: OSPF: Rcv hello from 133.3.3.3 area 0 from Serial0.2 133.3.235.3
21:33:17: OSPF: End of hello processing
21:33:38: OSPF: Send with youngest Key 1
R2#
R2#
21:33:43: OSPF: Rcv hello from 133.3.7.7 area 0 from Serial0.2 133.3.235.1
21:33:43: OSPF: End of hello processing
21:33:44: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected from 67839066 ,
call lasted 158 secpf lsa
21:33:44: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
21:33:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state
to down
21:33:47: OSPF: Rcv hello from 133.3.3.3 area 0 from Serial0.2 133.3.235.3
21:33:47: OSPF: End of hello processing
21:34:00: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0, TEI 83 changed to down
21:34:08: OSPF: Send with youngest Key 1
21:34:13: OSPF: Rcv hello from 133.3.7.7 area 0 from Serial0.2 133.3.235.1
21:34:13: OSPF: End of hello processing
What am I missing?
Anyone?
Merete
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:56:53 GMT-3