[LEDE-DEV] SUNXI: Network problem with kernel 4.9.51

[Gerhard Bertelsmann]

Hi,

I'm trying Lede HEAD with a BananaPI (SUNXI7 A20) and have an issue with 
the network connection:

root at Modellbahn-BPi:/# ping -qc 100 192.168.0.9
PING 192.168.0.9 (192.168.0.9): 56 data bytes

--- 192.168.0.9 ping statistics ---
100 packets transmitted, 87 packets received, 13% packet loss
round-trip min/avg/max = 0.407/0.543/0.792 ms

In contrast to Lede 17.01.2, which is working fine, network packets are 
lost/dropped:

root at Modellbahn-BPi:/# ip -s -d link show eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel 
master br-lan state UP mode DEFAULT group default qlen 1000
     link/ether 02:03:0a:43:06:44 brd ff:ff:ff:ff:ff:ff promiscuity 1
     bridge_slave state forwarding priority 32 cost 4 hairpin off guard 
off root_block off fastleave off learning on flood on port_id 0x8001 
port_no 0x1 designated_port 32769
     RX: bytes  packets  errors  dropped overrun mcast
     385729     2524     0       47      0       0
     TX: bytes  packets  errors  dropped carrier collsns
     70887      537      0       0       0       0

Does anybody have a clue why this happens ?

Some infos

   \    LE  \    /  
-----------------------------------------------------------
    \  DE    \  /    Reboot (SNAPSHOT, r4902-3fbf3ab)
     \________\/    
-----------------------------------------------------------

root at Modellbahn-BPi:/# uname -a
Linux Modellbahn-BPi 4.9.51 #0 SMP PREEMPT Fri Sep 22 08:28:59 2017 
armv7l GNU/Linux

root at Modellbahn-BPi:/# ethtool eth0
Settings for eth0:
         Supported ports: [ TP AUI BNC MII FIBRE ]
         Supported link modes:   10baseT/Half 10baseT/Full
                                 100baseT/Half 100baseT/Full
                                 1000baseT/Half 1000baseT/Full
         Supported pause frame use: No
         Supports auto-negotiation: Yes
         Advertised link modes:  10baseT/Half 10baseT/Full
                                 100baseT/Half 100baseT/Full
                                 1000baseT/Half 1000baseT/Full
         Advertised pause frame use: No
         Advertised auto-negotiation: Yes
         Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                              100baseT/Half 100baseT/Full
                                              1000baseT/Full
         Link partner advertised pause frame use: Symmetric
         Link partner advertised auto-negotiation: Yes
         Speed: 1000Mb/s
         Duplex: Full
         Port: MII
         PHYAD: 0
         Transceiver: external
         Auto-negotiation: on
         Supports Wake-on: d
         Wake-on: d
         Current message level: 0x0000003f (63)
                                drv probe link timer ifdown ifup
         Link detected: yes

Regards

Gerd