Very low traffic on C819G+7-K9

[sebastien3]

Hello,

I don't understand why I get these values ​​in Uplink/Downlink MAX :

        Negotiated QOS Parameters:
        Precedence = Low Priority, Delay = Class 3
        Reliability = Unack GTP, LLC, Ack RLC, Protected data
        Peak = 8 kB/sec, Mean = 50000 kB/hr
        Traffic Class = Interactive
        Uplink Max = 64kbps, Guaranteed = Subscribed
        Downlink Max = 64kbps, Guaranteed = Subscribed
        Max SDU size = 1450 bytes
        SDU error ratio = 1E-4, BER = 1E-5

C819G#sh cellular 0 radio
Radio power mode = ON
Current Band = WCDMA 900, Channel Number = 3004
Current RSSI = -75 dBm
Band Selected = Auto
Number of nearby cells = 1
Cell 1
        Primary Scrambling Code = 0x1DA
        RSCP = -76 dBm, ECIO = -5 dBm

Do you have any idea of ​​the problem or the configuration to modify ?

Thank you !

[Georg Pauwen]

Hello,

--> Do you have any idea of ​​the problem or the configuration to modify ?

Post the running configuration of your router...

[sebastien3]

Hello @Georg Pauwen 

My config is very basic :

version 15.1
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname C819G
!
boot-start-marker
boot-end-marker
!
no aaa new-model
!
crypto pki token default removal timeout 0
!
no ip source-route
no ip gratuitous-arps
ip cef
!
no ip bootp server
no ip domain lookup
ip domain name lab.local
no ipv6 cef
!
!
multilink bundle-name authenticated
chat-script gsm "" "AT!SCACT=1,1" TIMEOUT 60 "OK"
!
!
controller Cellular 0
 gsm gps mode standalone
!
ip ssh maxstartups 4
ip ssh time-out 60
ip ssh version 2
!
interface Cellular0
 ip address negotiated
 ip nat outside
 ip virtual-reassembly in
 encapsulation slip
 dialer in-band
 dialer idle-timeout 0
 dialer string gsm
 dialer-group 1
 async mode interactive
!
interface FastEthernet0
 no ip address
!
interface FastEthernet1
 no ip address
!
interface FastEthernet2
 no ip address
!
interface FastEthernet3
 no ip address
!
interface GigabitEthernet0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0
 no ip address
 shutdown
 clock rate 2000000
!
interface Vlan1
 ip address 192.168.1.1 255.255.255.0
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip nat inside
 ip virtual-reassembly in
 ip verify unicast reverse-path
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
ip nat inside source list 101 interface Cellular0 overload
ip route 0.0.0.0 0.0.0.0 Cellular0
!
ip access-list extended SSH
 permit tcp any any eq 22
!
ip sla 1
 icmp-echo 8.8.8.8 source-interface Vlan1
 frequency 10
ip sla schedule 1 life forever start-time now
!
access-list 1 permit any
access-list 101 permit ip 192.168.1.0 0.0.0.255 any
dialer-list 1 protocol ip list 1
!
control-plane
!
!
line con 0
 exec-timeout 5 0
 login local
line aux 0
 no exec
line 3
 script dialer gsm
 no exec
 rxspeed 21600000
 txspeed 5760000
line vty 0 4
 access-class SSH in
 exec-timeout 5 0
 login local
 transport input ssh
 transport output none
!
scheduler max-task-time 5000
scheduler allocate 20000 1000

[Georg Pauwen]

Hello,

hard to say, the config looks clean. The first thing I would do is check with the ISP, as that is where these values come from

On your router, try and remove:

ip verify unicast reverse-path

from the Vlan 1 interface.

[sebastien3]

Thanks @Georg Pauwen !

Can you explain to me the impact of ip verify unicast reverse-path on vlan interface ?

Here the problem is not related to this. I changed my SIM card and it works fine, Uplink/downlink Max is not 64K !

[Georg Pauwen]

Hello,

the 'ip verify unicast reverse-path' should have no impact on your Vlan interface, unless you expect an attack (DoS/Smurf/TFN) from he inside. It just adds to overhead and CPU utilization, so you might as well remove it.

The most likely issue was indeed SIM/provider related, you found the solution, good to knpw !

[sebastien3]

Thanks @Georg Pauwen

Can you explain the reason for the cellular disconnection with code 36 after long hours of connection ??

sh cellular 0 connection
Data Transmitted = 162284 bytes, Received = 161044 bytes
Profile 1, Packet Session Status = INACTIVE
        Inactivity Reason = Regular deactivation

Is this caused by provider ?