From: Ben-Shalom, Omer (omer.ben-shalom@xxxxxxxxx)
Date: Tue Nov 06 2001 - 04:57:00 GMT-3
I know this is one of the most discussed issues in the past and I read
through about 300 letter on this BUT
The previous responses are sometimes conflicting and I don't see any
solution for my problem.
(for people who want to go straight to the real question look below at the
!!!! line)
to sum:
I have 2 routers running only OSPF, they are connected via ISDN with dialer
interfaces.
The ISDN line keeps coming up immediately after it goes down, dial reason is
sending to 244.0.0.5,
I tried setting one or both sides to be demand circuit, in both cases both
sides show that it is a demand circuit with show ip ospf interface.
DNA is showing in database, dead time is empty.
Everything looks OK but I always show that the router is sending periodic
data such as
4d22h: Di0 DDR: ip (s=150.100.100.1, d=224.0.0.5), 64 bytes
and so on - every 40 seconds, in spite of this the ispf network type is
point-to-point and show ip ospf int dialer 0 shows:
Dialer0 is up, line protocol is up (spoofing)
Internet Address 150.100.100.1/24, Area 0
Process ID 1, Router ID 2.2.2.2, Network Type POINT_TO_POINT, Cost: 1785
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 00:00:39 (using PollInterval of 40)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
so I am at a loss as to why the router is sending hello every 40 seconds
when it is
clearly marked as a demand circuit with DoNotAge LSA allowd
Changing the interesting traffic definition brings:
Nov 6 09:35:32: Di0 DDR: ip (s=150.100.100.1, d=224.0.0.5), 64 bytes,
outgoing uninteresting (list 102)
Nov 6 09:36:12: Di0 DDR: ip (s=150.100.100.1, d=224.0.0.5), 64 bytes,
outgoing uninteresting (list 102)
(again every 40 seconds)
but then the adjacency is going down after a while with the message:
%OSPF-5-ADJCHG: Process 1, Nbr 3.3.3.3 on Dialer0 from FULL to DOWN,
Neighbor Down: Too many retransmissions on Demand Circuit
Both routers are running 12.1
setting the no peer route option on the interface removes the host route of
the other end but does not change the situation in any way.
defining demand circuit on one side or both, on dial interface and/or
physical interface and so on makes no change.
My configuration of one router below (the other is very similar)
Any remarks on what to do to stop this are most welcome, I am really at a
loss here
Thanks
Omer.
------------- config follows -------------------
version 12.1
service timestamps debug datetime
service timestamps log uptime
no service password-encryption
!
hostname 3600-2
!
enable password cisco
!
username 2500-2 password 0 cisco
username dspcbc password 0 cisco
!
!
!
!
ip subnet-zero
no ip domain-lookup
!
isdn switch-type basic-dms100
!
!
crypto isakmp policy 10
authentication pre-share
crypto isakmp key cisco address 150.100.100.2
!
!
crypto ipsec transform-set DSPC ah-md5-hmac esp-des
!
crypto map DSPC 10 ipsec-isakmp
set peer 150.100.100.2
set transform-set DSPC
match address 101
!
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface Tunnel10
ip address 150.100.200.1 255.255.255.252
shutdown
tunnel source Dialer0
tunnel destination 150.100.100.2
!
interface Serial0/0
no ip address
encapsulation frame-relay
no fair-queue
serial restart-delay 0
!
interface Ethernet1/0
ip address 170.100.42.241 255.255.255.240
!
interface BRI2/0
no ip address
encapsulation ppp
ip ospf demand-circuit
dialer pool-member 1
isdn switch-type basic-dms100
no peer neighbor-route
ppp authentication chap
ppp multilink
crypto map DSPC
!
interface Dialer0
ip address 150.100.100.1 255.255.255.0
encapsulation ppp
ip ospf network point-to-point
ip ospf demand-circuit
dialer pool 1
dialer remote-name dspcbc
dialer string 9039271092
dialer-group 1
no peer neighbor-route
ppp authentication chap
!
router ospf 1
router-id 2.2.2.2
log-adjacency-changes
network 2.2.2.2 0.0.0.0 area 0
network 150.100.100.1 0.0.0.0 area 0
!
ip classless
ip http server
!
access-list 101 permit ospf any any
access-list 101 permit ip any any
access-list 101 permit igmp any any
access-list 102 deny ip any host 224.0.0.5
access-list 102 permit ip any any
dialer-list 1 protocol ip list 102
!
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