Router LTE connection breaks down

[Marco Serato]

Hello

For a short time now, my LTE connection in the Cisco router has been breaking down repeatedly. This is very annoying because the VPN tunnel used is always gone. Unfortunately I can't do much with the logging messages. these messages are shown after every connection break down.

Can anyone help what is wrong here?

Oct 15 05:02:36.489 CEST: %CELLWAN-2-MODEM_DOWN: Modem in slot 0/2 is DOWN
Oct 15 05:02:38.250 CEST: %IOSXE-2-PLATFORM: R0/0: kernel: cwan_eth0: Tx ERROR RETURN urb: ffffffc05998c3c0 status: -ESHUTDOWN
Oct 15 05:02:39.320 CEST: %CELLWAN-2-MODEM_DOWN: Modem in slot 0/2 is DOWN
Oct 15 05:02:39.303 CEST: %IOSXE-3-PLATFORM: R0/0: ngiolite: WWAN modem Action:[remove] State[2]
Oct 15 05:02:46.614 CEST: %IOSXE-3-PLATFORM: R0/0: ngiolite: WWAN modem Action:[add] State[1]
Oct 15 05:03:43.895 CEST: %LINK-3-UPDOWN: Interface Cellular0/2/0, changed state to down
Oct 15 05:03:44.894 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Cellular0/2/0, changed state to down
Oct 15 05:04:55.945 CEST: %CELLWAN-2-MODEM_UP: Modem in slot 0/2 is now UP
Oct 15 05:04:56.148 CEST: %CELLWAN-2-MODEM_RADIO: Cellular0/2/0 Modem radio has been turned on
Oct 15 05:05:04.677 CEST: %LINK-3-UPDOWN: Interface Cellular0/2/0, changed state to up
Oct 15 05:05:05.678 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Cellular0/2/0, changed state to up
Oct 15 05:07:32.186 CEST: %CELLWAN-2-MODEM_DOWN: Modem in slot 0/2 is DOWN
Oct 15 05:07:35.473 CEST: %IOSXE-2-PLATFORM: R0/0: kernel: cwan_eth0: Tx ERROR RETURN urb: ffffffc0599947c0 status: -ESHUTDOWN
Oct 15 05:07:36.532 CEST: %CELLWAN-2-MODEM_DOWN: Modem in slot 0/2 is DOWN
Oct 15 05:07:36.526 CEST: %IOSXE-3-PLATFORM: R0/0: ngiolite: WWAN modem Action:[remove] State[2]
Oct 15 05:07:43.897 CEST: %IOSXE-3-PLATFORM: R0/0: ngiolite: WWAN modem Action:[add] State[1]
Oct 15 05:08:41.182 CEST: %LINK-3-UPDOWN: Interface Cellular0/2/0, changed state to down
Oct 15 05:08:42.181 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Cellular0/2/0, changed state to down
Oct 15 05:09:53.947 CEST: %CELLWAN-2-MODEM_UP: Modem in slot 0/2 is now UP
Oct 15 05:09:54.149 CEST: %CELLWAN-2-MODEM_RADIO: Cellular0/2/0 Modem radio has been turned on
Oct 15 05:10:03.239 CEST: %LINK-3-UPDOWN: Interface Cellular0/2/0, changed state to up
Oct 15 05:10:04.239 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Cellular0/2/0, changed state to up

Greetings Martin

[balaji.bandi]

how does your config looks like ? have you contract LTE provider about the issue ?

[Marco Serato]

I have not contacted the provider yet. Here I was not sure if it is a provider problem according to logging or hardware?

Here the config from the celluar interface

interface Cellular0/2/0
ip address negotiated
ip mtu 1492
ip tcp adjust-mss 1460
load-interval 30
dialer in-band
dialer-group 1
pulse-time 1
crypto map vpn-tunnel

[snicklas1]

Did you find anything out?  We are seeing a similar issue and error message.

[Marco Serato]

Hello
After a lot of testing and tickets with the provider, from our point of view it was a problem with the provider.

Our provider didn't think it was the provider's fault, but by switching to another mobile provider the problem was gone.