I have had several problems trying to get ISDN to work as a backup to a Frame-relay interface without any success so far. The current attempt is shown below. In addition to the config below I have placed the backup commands on the serial sub-interface. I've also used floating static routes.
The use of floating static routes did work, however, this setup causes problems with Windows NT services bringing up the interface periodically.
Any suggestions would be appreciated.
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CENTRAL SITE
This router uses static routes to connect to the network. It relies on the remote router to dial.
YYYRTR1#sh ru
hostname YYY14RTR1
!
logging buffered 10000 debugging
enable password 7 01115654415814
!
username XXX01rtr6 password 7 0509070C2A595E
memory-size iomem 20
clock timezone XXX
no ip subnet-zero
!
!
no ip domain-lookup
ip domain-name XXX
!
!
isdn switch-type basic-net3
call rsvp-sync
!
!
interface BRI0/0
description backup link to YYY01rtr6
bandwidth 64
no ip address
encapsulation ppp
no ip route-cache
no ip mroute-cache
dialer pool-member 1
isdn switch-type basic-net3
ppp authentication chap
!
interface Dialer1
description BRI backup to XXX01rtr6
ip address 10.18.236.7 255.255.255.0
dialer pool 1
dialer remote-name XXX01rtr6
dialer idle-timeout 60
dialer fast-idle 10
dialer string 020123456
dialer-group 1
no cdp enable
!
interface Serial0/0
description Frame Relay Y123456N
mtu 1600
bandwidth 1024
backup delay 1 5
backup interface Dialer1
no ip address
ip accounting output-packets
encapsulation frame-relay
no ip route-cache
no ip mroute-cache
no fair-queue
frame-relay lmi-type ansi
!
interface Serial0/0.1 point-to-point
description Frame Relay to XXX01RTR1
bandwidth 256
ip address 10.18.180.2 255.255.255.0
ip accounting output-packets
no ip route-cache
no ip mroute-cache
frame-relay interface-dlci 16
!
router eigrp 1
network 10.18.0.0 0.0.255.255
auto-summary
no eigrp log-neighbor-changes
!
no ip classless
no ip forward-protocol udp netbios-ns
no ip forward-protocol udp netbios-dgm
ip route 0.0.0.0 0.0.0.0 10.18.8.34
ip route 10.18.0.0 255.255.0.0 10.18.236.1 200
ip route 147.132.19.0 255.255.255.0 10.18.180.1
no ip http server
ip pim bidir-enable
!
dialer-list 1 protocol ip permit
snmp-server community XXX
snmp-server community XXX
snmp-server ifindex persist
snmp-server chassis-id XXXXX
snmp-server enable traps config
snmp-server enable traps frame-relay
snmp-server host 10.18.21.56 XXX
!
dial-peer cor custom
end
-------------------------------------------------------------------------
REMOTE ROUTER
This router is configured to initiate an ISDN session when the Frame-relay protocol drops (not the interface) on s0/0.1.
XXX01rtr6#sh ru
username YYY14RTR1 password 7 13071611001914
clock timezone XXX
clock summer-time AEDT recurring last Sun Oct 2:00 last Sun Mar 2:00
no ip subnet-zero
!
!
no ip domain-lookup
ip domain-name XXXX
ip name-server X.X.X.X
!
ip accounting-threshold 100000
!
call rsvp-sync
interface BRI0/0
description backup link for XXXXX
bandwidth 128
ip address 10.18.236.1 255.255.255.0
encapsulation ppp
no ip route-cache
no ip mroute-cache
shutdown
dialer idle-timeout 60
dialer fast-idle 5
dialer map ip 10.18.236.7 name YYY14rtr1 broadcast
dialer load-threshold 1 outbound
dialer-group 1
isdn switch-type basic-net3
ppp authentication chap
!
ip default-gateway 10.18.21.1
ip classless
ip route 10.18.182.0 255.255.255.0 10.18.236.7
no ip http server
ip pim bidir-enable
!
logging 10.18.21.56
dialer-list 1 protocol ip permit
snmp-server community XXX
snmp-server community XXX
snmp-server ifindex persist
snmp-server chassis-id XXXXX
snmp-server enable traps tty
snmp-server enable traps isdn layer2
snmp-server enable traps config
snmp-server enable traps entity
snmp-server enable traps envmon
snmp-server host 10.18.21.56 XXX
!
dial-peer cor custom
