Cellular vs. Dialer interface

[James Rune Hansen]

Hi All

I have created the following config on a 819HG.

When i from the router ping a host on the Internet it gives me 40-50ms and no packet loss.

When i from a host behind (NAT) the router i get 50% packet loss.

My config that fails is in the file.

I have been doing 3/4G/LTE using dialer interface many years. Have not seen this before..

When i moved the config to a pure Cell0 interface, and no dialer interface.. It works.

But what is wrong in my config ?

[Georg Pauwen]

Hello,

at first glance, it looks like your encapsulation types are mixed up. Try the config below (changes are marked in bold):

service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service sequence-numbers
!
hostname XXXX
!
boot-start-marker
boot-end-marker
!
aqm-register-fnf
!
logging buffered 50000 informational
!
no aaa new-model
clock timezone CET 1 0
clock summer-time CEST recurring last Sun Mar 2:00 last Sun Oct 3:00
!
ip domain name xxxx.xxxx
ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
chat-script lte "" "AT!CALL" TIMEOUT 20 "OK"
chat-script hspa "" "AT!CALL1" TIMEOUT 20 "OK"
!
license udi pid C819HG-4G-G-K9 sn xxxxxx
!
controller Cellular 0
!
ip ssh port xxxx rotary 1
ip ssh version 2
!
interface Cellular0
no ip address
ip nat outside
ip virtual-reassembly in
encapsulation slip
dialer in-band
dialer pool-member 1
dialer-group 1
async mode interactive
routing dynamic
!
interface FastEthernet0
no ip address
spanning-tree portfast
!
interface FastEthernet1
no ip address
spanning-tree portfast
!
interface FastEthernet2
no ip address
!
interface FastEthernet3
no ip address
!
interface GigabitEthernet0
no ip address
ip virtual-reassembly in
shutdown
duplex auto
speed auto
!
interface Serial0
no ip address
shutdown
clock rate 2000000
!
interface Vlan1
ip address 172.x.x.1 255.255.255.0
ip nat inside
ip virtual-reassembly in
ip tcp adjust-mss 1452
no autostate
!
interface Dialer1
ip address negotiated

ip mtu 1460
ip nat outside
ip virtual-reassembly in
encapsulation slip

ip tcp adjust-mss 1420
dialer pool 1
dialer idle-timeout 0
dialer string hspa
dialer persistent
dialer-group 1
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
ip nat inside source list NAT interface Dialer1 overload
ip route 0.0.0.0 0.0.0.0 Dialer1
!
ip access-list standard NAT
permit 172.x.x.0 0.0.0.255
!
ip sla 1
icmp-echo x.x.x.x source-interface Vlan1
frequency 30
ip sla schedule 1 life forever start-time now
dialer-list 1 protocol ip permit
!
access-list 1 permit any
!
control-plane
!
mgcp behavior rsip-range tgcp-only
mgcp behavior comedia-role none
mgcp behavior comedia-check-media-src disable
mgcp behavior comedia-sdp-force disable
!
mgcp profile default
!
line con 0
no modem enable
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
stopbits 1
line 3
exec-timeout 0 0
script dialer hspa
modem InOut
no activation-character
no exec
transport preferred none
transport input all
transport output all
rxspeed 100000000
txspeed 50000000
line vty 0 4
access-class VTY in
login local
rotary 1
transport input ssh
line vty 5 15
access-class VTY in
login local
rotary 1
transport input ssh
!
scheduler allocate 20000 1000

[James Rune Hansen]

I will try that later today.. But the odd thing was that any connection to and from the router it self was fine.. But when traffic wen't from the LAN behind and out it failed.

And the lan cable and so on is fine..