From: Danny.Wang@xxxxxxxxxxxxxx
Date: Mon Jul 08 2002 - 14:54:00 GMT-3
Very simple scenario. R1 connected to R2 with both ISDN and Ethernet.
Requiment:
1. Configure OSPF for the network
2. Do not allow OSPF hello to keep the ISDN link up indefinitely
3. The ISDN line should only come up when the ethernet connections failed
But after i enable the 'ip ospf demand circuit' on the dialer interface
(one side only), the link still constantly up and down, just wonderring if
i missed something or it's a Teltone simulator "bug" ;-j
When i enable debuy ip packet and dialer packet, it shows the dialer caused
by hello packet, source ip address from dialer 1 to 224.0.0.5 ).
when i modified the dialer-list on the R1, it's stopped, and leaving R2 as
is
dialer list 1 protocol list 100
access-list 100 deny ospf any any
access-list 100 permit ip any any
Any advice?
R1------ISDN-------R2
\ /
\ /
Ethernet
r1# sh run
Building configuration...
Current configuration : 1551 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname r1
!
!
username CCIE2 password 0 cisco
username r2 password 0 cisco
!
!
!
!
ip subnet-zero
no ip domain-lookup
!
ip audit notify log
ip audit po max-events 100
isdn switch-type basic-ni
!
!
!
!
!
!
!
interface Loopback0
ip address 10.10.11.1 255.255.255.255
!
interface Loopback1
ip address 10.10.12.1 255.255.255.255
!
interface Loopback2
ip address 10.10.13.1 255.255.255.255
!
interface Ethernet0/0
no ip address
shutdown
!
interface Serial0/0
no ip address
shutdown
no fair-queue
!
interface BRI0/0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-ni
isdn spid1 0835866101 8358661
isdn spid2 0835866301 8358663
ppp authentication chap
ppp multilink
!
interface Ethernet0/1
ip address 192.168.1.211 255.255.255.0
!
interface Dialer1
ip address 172.19.1.6 255.255.255.252
encapsulation ppp
ip ospf demand-circuit
dialer pool 1
dialer remote-name CCIE2
dialer string 8358662
dialer-group 1
ppp authentication chap
ppp chap hostname CCIE1
ppp multilink
!
router ospf 64
log-adjacency-changes
network 10.10.11.1 0.0.0.0 area 0
network 10.10.12.1 0.0.0.0 area 1
network 10.10.13.1 0.0.0.0 area 2
network 172.19.1.4 0.0.0.3 area 0
network 192.168.1.0 0.0.0.255 area 0
!
ip classless
ip http server
ip ospf name-lookup
!
dialer-list 1 protocol ip permit
!
!
alias exec r show run
alias exec c conf t
!
line con 0
exec-timeout 0 0
line aux 0
line vty 0 4
login
!
end
r2#sh run
Building configuration...
Current configuration : 1627 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname r2
!
logging buffered 10000 debugging
!
username CCIE1 password 0 cisco
username r1 password 0 cisco
!
!
!
!
ip subnet-zero
no ip domain-lookup
!
isdn switch-type basic-ni
!
!
!
!
!
!
!
interface Loopback0
ip address 10.10.11.2 255.255.255.255
!
interface Loopback1
ip address 10.10.12.2 255.255.255.255
!
interface Loopback2
ip address 10.10.13.2 255.255.255.255
!
interface Ethernet0/0
no ip address
shutdown
!
interface Serial0/0
no ip address
shutdown
no fair-queue
!
interface BRI0/0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-ni
isdn spid1 0835866201 8358662
isdn spid2 0835866401 8358664
ppp authentication chap
ppp multilink
!
interface Ethernet0/1
backup delay 2 2
backup interface Dialer1
ip address 192.168.1.212 255.255.255.0
!
interface Dialer1
ip address 172.19.1.5 255.255.255.252
encapsulation ppp
dialer pool 1
dialer remote-name CCIE1
dialer string 8358661
dialer load-threshold 128 either
dialer-group 1
ppp authentication chap
ppp chap hostname CCIE2
ppp multilink
!
router ospf 64
log-adjacency-changes
network 10.10.11.2 0.0.0.0 area 0
network 10.10.12.2 0.0.0.0 area 12
network 10.10.13.2 0.0.0.0 area 13
network 172.19.1.4 0.0.0.3 area 0
network 192.168.1.0 0.0.0.255 area 0
!
ip classless
ip http server
!
dialer-list 1 protocol ip permit
!
!
alias exec r show run
alias exec c conf t
line con 0
exec-timeout 0 0
line aux 0
line vty 0 4
login
!
end
Debug output:
00:44:45: IP: s=192.168.1.211 (local), d=224.0.0.5 (Ethernet0/1), len 68,
sendin
g broad/multicast
00:44:49: IP: s=192.168.1.212 (Ethernet0/1), d=224.0.0.5, len 68, rcvd 0
00:44:54: IP: s=172.19.1.6 (local), d=224.0.0.5 (Dialer1), len 64, sending
broad
/multicast
00:44:54: Di1 DDR: ip (s=172.19.1.6, d=224.0.0.5), 64 bytes, outgoing
interestin
g (ip PERMIT)
00:44:54: IP: s=172.19.1.6 (local), d=224.0.0.5 (BRI0/0), len 64,
encapsulation
failed
00:44:55: IP: s=192.168.1.211 (local), d=224.0.0.5 (Ethernet0/1), len 68,
sendin
g broad/multicast
00:44:55: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to up
00:44:55: %DIALER-6-BIND: Interface BR0/0:1 bound to profile Di1
00:44:56: %ISDN-6-CONNECT: Interface BRI0/0:1 is now connected to 8358662
00:44:56: %ISDN-6-DISCONNECT: Interface BRI0/0:1 disconnected from 8358662
This archive was generated by hypermail 2.1.4 : Sat Sep 07 2002 - 19:36:22 GMT-3