Hi,
I am having a problem with setting up a backup line with 2 ISDN routers
(2503) they are connected with a serial connection and a ISDN as backup.
I can ping the serial ip adresses...but if i do an extended ping and lets
say i ping the interface 1000 times and disconnect the Serial cable it
should come up with the ISDN line but t does not come up.
This is allso very strange ...
I have RouterA and RouterB...
When i log into the routerB and i tupe a no shutdown command on the BRI
interface i get this:
RouterB#config t
Enter configuration commands, one per line. End with CNTL/Z.
RouterB(config)#interface bri0
RouterB(config-if)#no shut
RouterB(config-if)#
%LINK-3-UPDOWN: Interface BRI0:1, changed state to down
%LINK-3-UPDOWN: Interface BRI0:2, changed state to down
%ISDN-6-DISCONNECT: Interface BRI0:1 disconnected from unknown , call
lasted 81 seconds
%ISDN-6-DISCONNECT: Interface BRI0:2 disconnected from unknown , call
lasted 82 seconds
%ISDN-6-LAYER2DOWN: Layer 2 for Interface BRI0, TEI 102 changed to down
%ISDN-6-LAYER2UP: Layer 2 for Interface BR0, TEI 103 changed to up
It comes UP again...that is strange isnt it?
These are my configs for the routers:
############################ RouterA########################
RouterA#sh run
Building configuration...
Current configuration:
!
version 11.2
no service password-encryption
no service udp-small-servers
no service tcp-small-servers
!
hostname RouterA
!
enable password cisco
!
username RouterB password 7 030752180500
isdn switch-type basic-net3
!
interface Ethernet0
ip address 195.1.1.1 255.255.255.0
no keepalive
shutdown
!
interface Serial0
backup delay 5 20
backup interface BRI0
ip address 193.1.1.1 255.255.255.0
encapsulation ppp
no fair-queue
clockrate 64000
!
interface Serial1
no ip address
shutdown
!
interface BRI0
ip address 196.1.1.1 255.255.255.0
encapsulation ppp
dialer idle-timeout 90
dialer map ip 196.1.1.2 name RouterB broadcast 21
dialer-group 1
no fair-queue
ppp authentication chap
ppp multilink
!
router rip
network 195.1.1.0
network 193.1.1.0
network 196.1.1.0
!
no ip classless
dialer-list 1 protocol ip permit
!
line con 0
password cisco
login
line aux 0
line vty 0 4
login
!
end
RouterA#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
default
U - per-user static route, o - ODR
Gateway of last resort is not set
193.1.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 193.1.1.0/24 is directly connected, Serial0
C 193.1.1.2/32 is directly connected, Serial0
R 196.1.1.0/24 [120/1] via 193.1.1.2, 00:00:09, Serial0
############################# RouterB###########################
RouterB#sh run
Building configuration...
Current configuration:
!
version 11.2
service timestamps debug datetime localtime
no service password-encryption
no service udp-small-servers
no service tcp-small-servers
!
hostname RouterB
!
enable password cisco
!
username RouterA password 7 030752180500
isdn switch-type basic-net3
!
interface Ethernet0
ip address 197.1.1.1 255.255.255.0
no keepalive
shutdown
!
interface Serial0
ip address 193.1.1.2 255.255.255.0
encapsulation ppp
!
interface Serial1
no ip address
shutdown
!
interface BRI0
ip address 196.1.1.2 255.255.255.0
encapsulation ppp
dialer idle-timeout 90
dialer map ip 196.1.1.1 name RouterA broadcast 20
dialer-group 1
no fair-queue
ppp authentication chap
ppp multilink
!
router rip
network 193.1.1.0
network 197.1.1.0
network 196.1.1.0
!
no ip classless
dialer-list 1 protocol ip permit
!
line con 0
line aux 0
line vty 0 4
password cisco
login
!
end
RouterB#sho ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
default
U - per-user static route, o - ODR
Gateway of last resort is not set
193.1.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 193.1.1.1/32 is directly connected, Serial0
C 193.1.1.0/24 is directly connected, Serial0
C 196.1.1.0/24 is directly connected, BRI0
Please help me with this...
Thank You
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