Aux back to back problem

From: syv (syv@911networks.com)
Date: Wed Sep 18 2002 - 19:54:35 GMT-3


Hi,

I have 2 router c1751 and c2505 connected back to back
through the Aux port.

No routing install but it still goes up and down like a yoyo:

Sep 18 15:46:15 PDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface Async1, changed state to up
Sep 18 15:48:12 PDT: %DIALER-6-UNBIND: Interface As1 unbound from profile Di0
Sep 18 15:48:14 PDT: %LINK-5-CHANGED: Interface Async1, changed state to reset
Sep 18 15:48:15 PDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface Async1, changed state to down
Sep 18 15:48:19 PDT: %LINK-3-UPDOWN: Interface Async1, changed state to up
Sep 18 15:48:19 PDT: %DIALER-6-BIND: Interface As1 bound to profile Di0
Sep 18 15:48:22 PDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface Async1, changed state to up
Sep 18 15:50:19 PDT: %DIALER-6-UNBIND: Interface As1 unbound from profile Di0
Sep 18 15:50:21 PDT: %LINK-5-CHANGED: Interface Async1, changed state to reset
Sep 18 15:50:22 PDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface Async1, changed state to down
Sep 18 15:50:26 PDT: %LINK-3-UPDOWN: Interface Async1, changed state to up
Sep 18 15:50:26 PDT: %DIALER-6-BIND: Interface As1 bound to profile Di0
Sep 18 15:50:29 PDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface Async1, changed state to up

Any suggestion?

I did debug on async, on ppp and on dialer and do not see
anything that would call the interface to go up.

The cdp does not [as defined in the dialer-list].

Here are the configs:

The c2505

c2505#s
Building configuration...

Current configuration : 2142 bytes
!
! Last configuration change at 10:05:14 PDT Wed Sep 18 2002
! NVRAM config last updated at 10:05:16 PDT Wed Sep 18 2002
!
version 12.1
no service single-slot-reload-enable
service timestamps debug datetime localtime show-timezone
service timestamps log datetime localtime show-timezone
no service password-encryption
!
hostname c2505
!
logging buffered 16384 debugging
enable secret 5 $1$Btx/$Kam.aSIufLXVTpi8mx7aC1
!
username c1751 password 0 123456
!
!
!
!
clock timezone PST -7
clock summer-time PDT recurring
ip subnet-zero
no ip domain-lookup
!
chat-script script-null-modem "" ""
!
!
!
hub ether 0 1
 link-test
 auto-polarity
!
hub ether 0 2
 link-test
 auto-polarity
!
hub ether 0 3
 link-test
 auto-polarity
!
hub ether 0 4
 link-test
 auto-polarity
!
hub ether 0 5
 link-test
 auto-polarity
!
hub ether 0 6
 link-test
 auto-polarity
!
hub ether 0 7
 link-test
 auto-polarity
!
hub ether 0 8
 link-test
 auto-polarity
!
interface Loopback0
 ip address 152.1.1.2 255.255.255.255
!
interface Ethernet0
 no ip address
 shutdown
!
interface Serial0
 bandwidth 64
 ip address 152.1.1.6 255.255.255.252
 no fair-queue
 clockrate 64000
!
interface Serial1
 bandwidth 64
 ip address 152.1.1.9 255.255.255.252
!
interface Async1
 no ip address
 encapsulation ppp
 dialer in-band
 dialer pool-member 1
 async default routing
 async dynamic routing
 async mode dedicated
!
interface Dialer0
 ip address 152.1.1.66 255.255.255.192
 encapsulation ppp
 dialer pool 1
 dialer remote-name c1751
 dialer string 111111
 dialer-group 1
!
ip classless
ip http server
!
dialer-list 1 protocol ip permit
!
alias exec c conf t
alias exec co cle ip ospf proc
alias exec cr clea ip rout *
alias exec r sh ip rout
alias exec i sh ip int bri
alias exec s sh run
alias exec sb sh run | begin
alias exec w wr mem
alias exec b sh ip bgp
alias exec o sh ip ospf
alias exec cb cle ip bgp *
!
line con 0
 exec-timeout 0 0
 logging synchronous
line aux 0
 exec-timeout 0 0
 script dialer script-null-modem
 logging synchronous
 modem InOut
 transport input all
 flowcontrol hardware
line vty 0 4
 exec-timeout 0 0
 password cisco
 logging synchronous
 login
!
end

The c1751

c1751#s
Building configuration...

Current configuration : 1926 bytes
!
! Last configuration change at 15:37:19 PDT Wed Sep 18 2002
! NVRAM config last updated at 09:18:18 PDT Wed Sep 18 2002
!
version 12.2
service timestamps debug datetime localtime show-timezone
service timestamps log datetime localtime show-timezone
no service password-encryption
!
hostname c1751
!
logging buffered 16384 debugging
enable secret 5 $1$7y.8$s.MeA39GpakvHZe0zWlCp1
!
username c2505 password 0 123456
clock timezone PST -7
clock summer-time PDT recurring
ip subnet-zero
!
!
no ip domain lookup
!
!
chat-script script-null-modem "" ""
!
!
!
interface Loopback0
 ip address 152.1.2.1 255.255.255.255
!
interface FastEthernet0/0
 ip address 172.16.1.1 255.255.255.0
 speed auto
!
interface Serial0/0
 bandwidth 64
 ip address 152.1.2.5 255.255.255.252
 no fair-queue
 clockrate 64000
!
interface Serial0/1
 bandwidth 64
 ip address 152.1.2.129 255.255.255.128
 no fair-queue
!
interface Serial1/0
 no ip address
!
interface Async5
 no ip address
 encapsulation ppp
 dialer in-band
 dialer pool-member 1
 dialer-group 1
 async default routing
 async dynamic routing
 async mode dedicated
!
interface Dialer0
 ip address 152.1.1.65 255.255.255.192
 encapsulation ppp
 dialer pool 1
 dialer remote-name c2505
 dialer string 111111
 dialer-group 1
!
ip classless
no ip http server
!
!
access-list 101 permit ip any host 152.1.1.66
dialer-list 1 protocol ip permit
!
alias exec c conf t
alias exec co cle ip ospf proc
alias exec cr cle ip rout *
alias exec i sh ip int brief
alias exec r sh ip rout
alias exec w wr mem
alias exec s sho run
alias exec sb show run | begin
alias exec o sh ip ospf
alias exec b sh ip bgp
alias exec cb cle ip bgp *
!
line con 0
 exec-timeout 0 0
 logging synchronous
line aux 0
 exec-timeout 0 0
 script dialer script-null-modem
 logging synchronous
 modem InOut
 transport input all
 flowcontrol hardware
line vty 0 4
 exec-timeout 0 0
 password 123456
 logging synchronous
 login
!
end

Thanks

----
syv@911networks.com


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