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Community Member

3g interface up/down

Hi

I have configured  cisco  887 

my problem is:

I see that  about five minutes intervals

*Jun  4 10:58:29.263: %LINK-5-CHANGED: Interface Cellular0, changed state to reset

*Jun  4 10:58:34.343: %LINK-3-UPDOWN: Interface Cellular0, changed state to down

and cellular interface up/up but has no ip address

when I ping  to internet  

*Jun  4 11:06:16.079: %LINK-3-UPDOWN: Interface Cellular0, changed state to up.

and cellular interface has ip adress

my config ;

chat-script gsm "" "ATDT*98*1#" TIMEOUT 60 CONNECT

interface Cellular0

ip address negotiated

ip nat outside

ip virtual-reassembly

encapsulation ppp

dialer in-band

dialer string gsm

dialer-group 5

async mode interactive

ppp chap hostname onur

ppp chap password 0 cicek

ppp ipcp dns request

crypto map hq_map

what can be the problem?

1 REPLY

Re: 3g interface up/down

Hi

the problem may be when no traffic coming so Cellular interface gos down, because no traffic.

I did

ip sla 10

icmp-echo 172.2.2.19 source-interface GigabitEthernet0/0

frequency 50

ip sla schedule 10 life forever start-time now

witch constantly sends icmp paket every 50 seconds so preventing Cellular interface go down.

dont forget to rate post if it helps.

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