881G-U-K9 Cellular interface always Inactive

Mohamed.Labib1 · ‎08-18-2015

hi All,

im having issue with Cisco 881G-U-K9 using Cellular interface after configuring the interface its not getting IP from the ISP and the cell profile is always INACTIVE.

appreciate your assistance.

interface config as follows:

interface Cellular0
description CONNECTED TO INTERNET
ip address negotiated
ip nat outside
ip virtual-reassembly in
encapsulation ppp
dialer in-band
no ip proxy-arp
dialer idle-timeout 0
dialer string vodafone
dialer-group 1
async mode interactive
ppp authentication chap pap callin
ppp chap hostname internet
ppp chap password 0 internet
ppp ipcp dns request
crypto map vpn

chat-script vodafone "" "ATDT*99*1#" TIMEOUT 30 "CONNECT"

line 3
exec-timeout 0 0
script dialer vodafone
login
modem InOut
no exec
rxspeed 7200000
txspeed 5760000

Marcel van Dorp · ‎08-21-2015

did you specify a dialer-list to define interesting traffic? Without that the router will not know when to bring up the interface

add this under global config: dialer-list 1 protocol ip permit

and a static route using the interface: ip route 0.0.0.0 0.0.0.0 Cellular0

proper nat rule

and, do not forget to generate interesting traffic, simple ping will do.

You can abuse "ip sla" with a low frequency to bring the connection up after a router reboot. Better source that from a loopback (include in your nat!)

sample:

ip sla 1
icmp-echo 8.8.8.8 source-interface Loopback1
frequency 10

followed by: ip sla schedule 1 life forever start-time now

rosaho · ‎08-31-2015

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