cisco 888g cellular interface is flapping!
thedrama
Member Posts: 291 ■□□□□□□□□□
in CCNA & CCENT
hey, i've started to work in a network corporation. currently, what i am required is understanding the cisco 888 g router from set up to troubleshooting.
i edited the very first post.Now, everything is superbly fine. here is the config working for a specific location.
how 3G cellular data call works? Chat script initiates the call. Then, it invokes the line 3.this follows the dialer string under cellular interface. This way, data call is opened. Consequently,ppp session is established along with GSM IP received. Before everything, 'cellular 0 gsm profile create 1 xxxx" must be correct. in thisline, xxxx must be the string provided by the provider. (apn name)"ppp chap hostname xxxx" line under the cellular must be the sim number on the sim card inserted into 3g modem. chat script, dialer string and script dialer all must be same. dialer group must be entered and associated with the dialer groupline. dialer pool must be described. password must be typed given by the provider and last but not least, dialer route must be applied.
here is the working config.
hostname xxxx
!
boot-start-marker
boot-end-marker
!
!
enable secret 5 $1$As1M$pVIb7dIb4AV1wA6SODD7g.
!
no aaa new-model
!
memory-size iomem 10
crypto pki token default removal timeout 0
!
!
ip source-route
!
!
!
!
!
ip cef
no ipv6 cef
!
!
multilink bundle-name authenticated
chat-script trcell "" "ATDT*99*1#" TIMEOUT 30 "CONNECT"
!
!
username mmmm privilege 15 password 0 nnnnn
username kkkk privilege 15 password 0 ttttt
!
!
!
!
controller DSL 0
!
controller Cellular 0
!
!
!
!
!
!
!
!
interface FastEthernet0
no ip address
!
interface FastEthernet1
no ip address
!
interface FastEthernet2
no ip address
!
interface FastEthernet3
no ip address
!
interface Cellular0
no ip address
ip virtual-reassembly in
encapsulation ppp
dialer in-band
dialer pool-member 2
dialer-group 2
async mode interactive
!
interface Vlan1
ip address 172.17.x.x 255.255.255.0
ip tcp adjust-mss 1452
!
interface Dialer2
ip address negotiated
encapsulation ppp
dialer pool 2
dialer idle-timeout 0
dialer string trcell
dialer persistent
dialer-group 2
ppp chap hostname 533xxxxx
ppp chap password 0 zzzz
ppp ipcp dns request
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
ip route 0.0.0.0 0.0.0.0 Dialer2
!
access-list 1 permit any
access-list 23 permit 10.0.0.0 0.0.255.255
access-list 101 permit ip any any
access-list 102 permit ip any any
dialer-list 1 protocol ip list 101
dialer-list 2 protocol ip list 101
!
!
!
!
!
control-plane
!
!
line con 0
password cisco
login local
line aux 0
line 3
exec-timeout 0 0
script dialer trcell
modem InOut
no exec
transport input all
rxspeed 7200000
txspeed 5760000
line vty 0 4
password TTVPN
login local
transport input all
!
end
i edited the very first post.Now, everything is superbly fine. here is the config working for a specific location.
how 3G cellular data call works? Chat script initiates the call. Then, it invokes the line 3.this follows the dialer string under cellular interface. This way, data call is opened. Consequently,ppp session is established along with GSM IP received. Before everything, 'cellular 0 gsm profile create 1 xxxx" must be correct. in thisline, xxxx must be the string provided by the provider. (apn name)"ppp chap hostname xxxx" line under the cellular must be the sim number on the sim card inserted into 3g modem. chat script, dialer string and script dialer all must be same. dialer group must be entered and associated with the dialer groupline. dialer pool must be described. password must be typed given by the provider and last but not least, dialer route must be applied.
here is the working config.
hostname xxxx
!
boot-start-marker
boot-end-marker
!
!
enable secret 5 $1$As1M$pVIb7dIb4AV1wA6SODD7g.
!
no aaa new-model
!
memory-size iomem 10
crypto pki token default removal timeout 0
!
!
ip source-route
!
!
!
!
!
ip cef
no ipv6 cef
!
!
multilink bundle-name authenticated
chat-script trcell "" "ATDT*99*1#" TIMEOUT 30 "CONNECT"
!
!
username mmmm privilege 15 password 0 nnnnn
username kkkk privilege 15 password 0 ttttt
!
!
!
!
controller DSL 0
!
controller Cellular 0
!
!
!
!
!
!
!
!
interface FastEthernet0
no ip address
!
interface FastEthernet1
no ip address
!
interface FastEthernet2
no ip address
!
interface FastEthernet3
no ip address
!
interface Cellular0
no ip address
ip virtual-reassembly in
encapsulation ppp
dialer in-band
dialer pool-member 2
dialer-group 2
async mode interactive
!
interface Vlan1
ip address 172.17.x.x 255.255.255.0
ip tcp adjust-mss 1452
!
interface Dialer2
ip address negotiated
encapsulation ppp
dialer pool 2
dialer idle-timeout 0
dialer string trcell
dialer persistent
dialer-group 2
ppp chap hostname 533xxxxx
ppp chap password 0 zzzz
ppp ipcp dns request
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
ip route 0.0.0.0 0.0.0.0 Dialer2
!
access-list 1 permit any
access-list 23 permit 10.0.0.0 0.0.255.255
access-list 101 permit ip any any
access-list 102 permit ip any any
dialer-list 1 protocol ip list 101
dialer-list 2 protocol ip list 101
!
!
!
!
!
control-plane
!
!
line con 0
password cisco
login local
line aux 0
line 3
exec-timeout 0 0
script dialer trcell
modem InOut
no exec
transport input all
rxspeed 7200000
txspeed 5760000
line vty 0 4
password TTVPN
login local
transport input all
!
end
Monster PC specs(Packard Bell VR46) : Intel Celeron Dual-Core 1.2 GHz CPU , 4096 MB DDR3 RAM, Intel Media Graphics (R) 4 Family with IntelGMA 4500 M HD graphics. 
5 year-old laptop PC specs(Toshiba Satellite A210) : AMD Athlon 64 x2 1.9 GHz CPU, ATI Radeon X1200 128 MB Video Memory graphics card, 3072 MB 667 Mhz DDR2 RAM. (1 stick 2 gigabytes and 1 stick 1 gigabytes)
5 year-old laptop PC specs(Toshiba Satellite A210) : AMD Athlon 64 x2 1.9 GHz CPU, ATI Radeon X1200 128 MB Video Memory graphics card, 3072 MB 667 Mhz DDR2 RAM. (1 stick 2 gigabytes and 1 stick 1 gigabytes)
Comments
-
atorven
Member Posts: 319
Just a wild guess, I would assume that you get the password from whoever manages the other device you’re trying to connect to.
On an unrelated note, how comes you don't have service encryption turned on? -
thedrama
Member Posts: 291 ■□□□□□□□□□
Just a wild guess, I would assume that you get the password from whoever manages the other device you’re trying to connect to.
On an unrelated note, how comes you don't have service encryption turned on?
i do assign that specific password received by the service provider.
encryption tunnel? not yet. what im struggling now is running the 3g at basic form. tunnel will come later.Still
cellular interface is flapping while dialer is up.
why?Monster PC specs(Packard Bell VR46) : Intel Celeron Dual-Core 1.2 GHz CPU , 4096 MB DDR3 RAM, Intel Media Graphics (R) 4 Family with IntelGMA 4500 M HD graphics.
5 year-old laptop PC specs(Toshiba Satellite A210) : AMD Athlon 64 x2 1.9 GHz CPU, ATI Radeon X1200 128 MB Video Memory graphics card, 3072 MB 667 Mhz DDR2 RAM. (1 stick 2 gigabytes and 1 stick 1 gigabytes) -
RouteMyPacket
Member Posts: 1,104
i do assign that specific password received by the service provider.
encryption tunnel? not yet. what im struggling now is running the 3g at basic form. tunnel will come later.Still
cellular interface is flapping while dialer is up.
why?
He meant why aren't your password encrypted and in clear text? Hence "service password-encryption" which encrypts all passwords.
Anyway, when I hear "flapping" I immediately think of a network loop. What is connected on these interfaces? I am unfamiliar with exactly what you are doing but try a "sh cdp neighbors", "sh int trunk" and "sh vlan br"
Flapping is generally a network loop somewhere.Modularity and Design Simplicity:
Think of the 2:00 a.m. test—if you were awakened in the
middle of the night because of a network problem and had to figure out the
traffic flows in your network while you were half asleep, could you do it?