897 4G int cell 0 up with IP address but not pass traffic

Richard Bradfield · ‎10-21-2016

Hi I have one site with the 4G not working on an 897 router.no problems with the other 10 sites.

configuration of the interface

interface Cellular0
ip address negotiated
ip nat outside
ip virtual-reassembly in
encapsulation slip
load-interval 30
dialer in-band
dialer idle-timeout 0
dialer string lte
dialer-group 1
no peer default ip address
async mode interactive
crypto map cmap
routing dynamic
end

see below the interface is up with IP address, it comes up when I initiate a ping as below

Cellular0 is up, line protocol is up
Hardware is 4G WWAN Modem - Global (Europe & Australia) Multimode LTE/DC-HSPA+/HSPA+/HSPA/U
Internet address is 10.96.248.57/32
MTU 1500 bytes, BW 50000 Kbit/sec, DLY 100000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
Encapsulation SLIP, loopback not set
Keepalive not supported
Last input 00:12:00, output never, output hang never Last clearing of "show interface" counters 1d06h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/10 (size/max)
30 second input rate 0 bits/sec, 0 packets/sec
30 second output rate 0 bits/sec, 0 packets/sec
     3 packets input, 84 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 3 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
     DCD=up DSR=up DTR=up RTS=up CTS=up

and to test

IP route 203.14.0.250 255.255.255.254 cell 0

but when I ping 203.14.0.250 it times out.

also cannot ping 10.96.248.57 the IP address of the interface.

I do show IP route and see 10.96.248.57 is directly connected

#sh ip route | i 10.96
C 10.96.248.57/32 is directly connected, Cellular0

so there is a disconnect between the router and the cellular modem, the interface comes up with the first ping, and stays up till I clear the interface,but no there is no traffic passed

anybody any ideas on this one

thanks

Richard

kris000011111111 · ‎10-24-2016

Hi Richard,

I have the same issue.
What do you have as Line0 configuration and chat script?

Do you have this?

line 0/0/0			
 exec-timeout 0 0
 ! Calls the chat-script
 script dialer LTE
 ! activates the script it did not work without it for GSM card. Not tested fir LTE card. 
 script activation LTE
 modem InOut
 no exec

KR,

Kris

Richard Bradfield · ‎10-24-2016

Hi KR

for the 897 it is line 3

the modem side works as the interface picks up an IP address

line 3
script dialer lte
modem InOut
no exec
transport input all
transport output all
rxspeed 100000000
txspeed 50000000

Richard Bradfield · ‎10-24-2016

OK I found the problem

it was to do with the crypto map on the Cellular interface.

The Associated ACL had as last ACE 'ip permit any any'

removed entry and everything started working