EM7455 : arping not working in raw-IP mode

Senthilganapathy Paramasivam senthilgp2020 at gmail.com
Thu Oct 5 19:15:44 UTC 2017

Hi ,

Does Raw-IP mode not support arping?  Can some one clarify why arping
is not working?
The connection procedure is shown as below.
EM7455 is directly wired to base station simulator ( CMW500 ).

# qmicli -p -d /dev/cdc-wdm1 --wds-start-network="apn=broadband,ip-type=4" --dev
ice-open-net="net-raw-ip|net-no-qos-header" --device-open-sync --client-no-relea
[/dev/cdc-wdm1] Network started
        Packet data handle: '63501184'
[/dev/cdc-wdm1] Client ID not released:
        Service: 'wds'
            CID: '35'

# echo Y > /sys/class/net/wwan1/qmi/raw_ip

# udhcpc -i wwan1
udhcpc: started, v1.26.2
udhcpc: sending discover
udhcpc: sending select for
udhcpc: lease of obtained, lease time 7200
deleting routers
adding dns
Recorded lease to [/var/run/udhcpc-wwan1.lease]

# ifconfig wwan1
        inet  netmask  destination
        unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
txqueuelen 1000  (UNSPEC)
        RX packets 20  bytes 2116 (2.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 31  bytes 3842 (3.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

# ping -I wwan1
PING ( from wwan1: 56(84) bytes of data.
64 bytes from icmp_seq=1 ttl=64 time=16.8 ms
64 bytes from icmp_seq=2 ttl=64 time=13.7 ms
64 bytes from icmp_seq=3 ttl=64 time=14.7 ms
64 bytes from icmp_seq=4 ttl=64 time=14.9 ms
64 bytes from icmp_seq=5 ttl=64 time=15.9 ms
64 bytes from icmp_seq=6 ttl=64 time=14.9 ms
64 bytes from icmp_seq=7 ttl=64 time=15.9 ms

# arping -I wwan1 -s
arping: Device wwan1 not available.

Thanks and Regards

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