Serial interface problem

[telkholy]

Dear all

I have a 1721 router with WIC-1T connected to framerelay network, when the modem is powered off and then powered on again serial interface becomes down/down and not becomes up again except i unplug & plug the serial cable connecting the modem and the router.

I changed everything; router, WIC-1T, serial cable & modem; and the problem still exist.

Anyone has any idea about that.

[spremkumar]

hi

can you revert back the exact ios code which you are running in this router ?

Since you have already changed the cable,card & modem may be the possible problem can be with the IOS code coz of some unknown/known bug.

regds

[telkholy]

Find bellow the configuration on the router

The IOS image is c1700-y-mz.124-5a.bin

Building configuration...

Current configuration : 1295 bytes

!

! No configuration change since last restart

!

service timestamps debug datetime msec

service timestamps log datetime msec

service password-encryption

!

!

logging queue-limit 100

!

ip subnet-zero

!

!

ip name-server X.X.X.X

ip name-server X.X.X.X

!

!

isdn switch-type basic-net3

!

!

!

interface BRI0

ip address 1.1.1.1 255.255.255.252

encapsulation ppp

dialer idle-timeout 60

dialer string xxxxxxx

dialer load-threshold 1 either

dialer-group 1

isdn switch-type basic-net3

no fair-queue

no cdp enable

ppp chap hostname xxx

ppp chap password 7 xxxxxxx

ppp multilink

!

interface FastEthernet0

ip address X.X.X.X 255.255.255.252

speed auto

!

interface Serial0

bandwidth 64

no ip address

no ip redirects

no ip unreachables

encapsulation frame-relay IETF

no fair-queue

frame-relay lmi-type ansi

!

interface Serial0.1 point-to-point

ip address X.X.X.X 255.255.255.252

backup delay 5 60

backup interface BRI0

frame-relay interface-dlci 20

!

ip classless

ip route 0.0.0.0 0.0.0.0 X.X.X.X

no ip http server

!

!

dialer-list 1 protocol ip permit

!

line con 0

line aux 0

line vty 0 4

password 7 0518160A265E16031607

login

!

end

[spremkumar]

hi

Can you try add a new floating static route in place of those backup commands under the serial interface ?

just remove these command backup delay 5 60

backup interface BRI0 from the serial interface and try configuring ip route 0.0.0.0 0.0.0.0 bri0 10.

After doing this can you try the same exercise which you were doing earlier and check whether your serial port comes active (up/up) instead of down/down as mentioned in your earlier mail..

regds

[telkholy]

Hi

Thank you first for your valueable recommendations

I did that before, i removed the configuration of BRI at all and i maintain the configuration of the serial only.

and the same problem exist.