Problems with PPP don´t work on Router C899G-LTE

[rbalaguera19]

Hi,

I have a problem an is when i use this command encapsulation ppp on the interface cellular 0

interface Cellular0
description ### Access WVPN ###
ip vrf forwarding WAN
ip address x.x.x.x x 255.255.254.0
ip access-group SUC-WVPN-IN in
ip virtual-reassembly

load-interval 30
dialer in-band
dialer idle-timeout 600
dialer string gsm
dialer-group 1
async mode interactive

crypto map GRE_IPSEC
encapsulation ppp

Cellular0: Only SLIP encapsulation supported

How to configure ppp in this case? And the authentication for the interface cellular 0?

I use this IOS: 15.6.3M5

c800-universalk9-mz.SPA.156-3.M5.bin

I hope they can help me.

Regards,

[Francesco Molino]

Hi

Normally your have to change the chat-script like chat-script gsm "" "AT!SCACT=1,1" TIMEOUT 60 "OK"

Some documentation that'll help you:
https://www.cisco.com/c/en/us/td/docs/routers/access/1800/1861/software/feature/guide/mrwls_hspa.html#wp1323053

[Georg Pauwen · Accepted solution]

Hello,

on a side note, 4G uses SLIP only as far as I recall. Try and 'offload' the cellular configuration to a dialer interface, which lets you use ppp:

interface Cellular0
description ### Access WVPN ###
ip address negotiated
ip virtual-reassembly
load-interval 30
dialer in-band
dialer pool-member 1
dialer-group 1
async mode interactive
!
interface Dialer1
ip address negotiated
ip nat outside
ip virtual-reassembly in
encapsulation ppp
dialer pool 1
dialer string gsm
dialer-group 1
ppp authentication pap callin
ppp pap sent-username yourusername password 0 yourpassoword

[rbalaguera19]

Georg Pauwen,

Thanks so much, I only have a question and is the next: I have an ip address in the interface cellular. Can I use the same ip address in the interface Dialer 1 ?

[Georg Pauwen]

Hello,

yes, you can configure an IP address on the dialer interface. Just make sure you remove 'ip address negotiated' from the cellular interface...