Hello Dear Sven: What kind of "caution" info? When i start ping hostb from hosta , i catch error info via dmesg , this is parts info please see attactment of email about more error info . Thanks again. [ 7199.866447] [] (ip_local_deliver_finish) from [] (ip_local_deliver+0x44/0xcc) [ 7199.904865] [] (ip_local_deliver) from [] (ip_rcv+0x28c/0x378) [ 7199.941909] [] (ip_rcv) from [] (__netif_receive_skb_core+0x76c/0xb24) [ 7199.979512] [] (__netif_receive_skb_core) from [] (process_backlog+0x58/0xd8) [ 7200.017753] [] (process_backlog) from [] (net_rx_action+0x1c0/0x2f8) [ 7200.055308] [] (net_rx_action) from [] (__do_softirq+0xb0/0x290) [ 7200.092406] [] (__do_softirq) from [] (irq_exit+0xc4/0x10c) [ 7200.129110] [] (irq_exit) from [] (__handle_domain_irq+0x50/0xa8) [ 7200.166474] [] (__handle_domain_irq) from [] (bcm2835_handle_irq+0x34/0x4c) [ 7200.204931] [] (bcm2835_handle_irq) from [] (__irq_usr+0x4c/0x60) [ 7200.242634] Exception stack(0xd9471fb0 to 0xd9471ff8) [ 7200.277642] 1fa0: 00596c78 00000000 00000000 b5eb8000 [ 7200.315958] 1fc0: 801a68c8 befca240 00000000 801a48e0 b644ec78 befca228 00000026 00000000 [ 7200.354047] 1fe0: 00000032 befca1e8 36353039 b6eac120 a0000010 ffffffff [ 7855.043910] bat0: hw csum failure [ 7855.074857] CPU: 0 PID: 0 Comm: swapper Tainted: G O 4.4.26-1-ARCH #1 [ 7855.109974] Hardware name: BCM2708 [ 7855.140615] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 7855.175696] [] (show_stack) from [] (__skb_checksum_complete+0xb4/0xb8) [ 7855.211340] [] (__skb_checksum_complete) from [] (icmp_rcv+0xa4/0x35c) [ 7855.247035] [] (icmp_rcv) from [] (ip_local_deliver_finish+0xc4/0x22c) [ 7855.282647] [] (ip_local_deliver_finish) from [] (ip_local_deliver+0x44/0xcc) [ 7855.318862] [] (ip_local_deliver) from [] (ip_rcv+0x28c/0x378) [ 7855.353794] [] (ip_rcv) from [] (__netif_receive_skb_core+0x76c/0xb24) [ 7855.389194] [] (__netif_receive_skb_core) from [] (process_backlog+0x58/0xd8) [ 7855.425373] [] (process_backlog) from [] (net_rx_action+0x1c0/0x2f8) [ 7855.460823] [] (net_rx_action) from [] (__do_softirq+0xb0/0x290) [ 7855.495919] [] (__do_softirq) from [] (irq_exit+0xc4/0x10c) [ 7855.530483] [] (irq_exit) from [] (__handle_domain_irq+0x50/0xa8) [ 7855.565501] [] (__handle_domain_irq) from [] (bcm2835_handle_irq+0x34/0x4c) [ 7855.601613] [] (bcm2835_handle_irq) from [] (__irq_svc+0x40/0x54) [ 7855.636711] Exception stack(0xc0a9df58 to 0xc0a9dfa0) [ 7855.669131] df40: da539e20 00000000 [ 7855.704679] df60: 035c3d5e 00000000 c0b2cf4c 00000000 c0a9c000 c0a9e0b4 c0b2cf00 c0b227c4 [ 7855.740071] df80: c0b21cef c0950d28 00000000 c0a9dfa8 c000f710 c000f714 60000013 ffffffff [ 7855.775373] [] (__irq_svc) from [] (arch_cpu_idle+0x28/0x30) [ 7855.809908] [] (arch_cpu_idle) from [] (cpu_startup_entry+0x114/0x15c) [ 7855.845403] [] (cpu_startup_entry) from [] (start_kernel+0x344/0x3b8) [ 7855.917089] bat0: hw csum failure [ 7855.947633] CPU: 0 PID: 0 Comm: swapper Tainted: G O 4.4.26-1-ARCH #1 [ 7855.982129] Hardware name: BCM2708 [ 7856.012280] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 7856.046900] [] (show_stack) from [] (__skb_checksum_complete+0xb4/0xb8) [ 7856.082154] [] (__skb_checksum_complete) from [] (icmp_rcv+0xa4/0x35c) [ 7856.117455] [] (icmp_rcv) from [] (ip_local_deliver_finish+0xc4/0x22c) [ 7856.152655] [] (ip_local_deliver_finish) from [] (ip_local_deliver+0x44/0xcc) [ 7856.189217] [] (ip_local_deliver) from [] (ip_rcv+0x28c/0x378) [ 7856.224818] [] (ip_rcv) from [] (__netif_receive_skb_core+0x76c/0xb24) [ 7856.261256] [] (__netif_receive_skb_core) from [] (process_backlog+0x58/0xd8) [ 7856.298716] [] (process_backlog) from [] (net_rx_action+0x1c0/0x2f8) [ 7856.335711] [] (net_rx_action) from [] (__do_softirq+0xb0/0x290) [ 7856.372376] [] (__do_softirq) from [] (irq_exit+0xc4/0x10c) [ 7856.408706] [] (irq_exit) from [] (__handle_domain_irq+0x50/0xa8) [ 7856.445578] [] (__handle_domain_irq) from [] (bcm2835_handle_irq+0x34/0x4c) [ 7856.483580] [] (bcm2835_handle_irq) from [] (__irq_svc+0x40/0x54) [ 7856.520723] Exception stack(0xc0a9df60 to 0xc0a9dfa8) [ 7856.555127] df60: da539e20 00000000 01616376 00000000 c0b2cf4c 00000000 c0a9c000 c0a9e0b4 [ 7856.592731] df80: c0b2cf00 c0b227c4 c0b21cef c0950d28 00000000 c0a9dfb0 c000f710 c0051358 [ 7856.630345] dfa0: 60000013 ffffffff [ 7856.663164] [] (__irq_svc) from [] (cpu_startup_entry+0x114/0x15c) [ 7856.700436] [] (cpu_startup_entry) from [] (start_kernel+0x344/0x3b8) [ 7857.773177] bat0: hw csum failure [ 7857.805894] CPU: 0 PID: 0 Comm: swapper Tainted: G O 4.4.26-1-ARCH #1 [ 7857.842773] Hardware name: BCM2708 于 2016年10月24日 14:29, Sven Eckelmann 写道: > On Montag, 24. Oktober 2016 13:11:38 CEST johnzeng wrote: >> Hello Dear Sven and Linus: >> >> You are right , and When i >> check /sys/class/net/bat0/mesh/* and i found archlinux lost >> network-coding . > No, they/you just haven't compiled network coding for batman-adv. And > you don't need it. > >> They were connected via a single cable as you . > What about the rest mentioned in my other mails? > >> Whether i need use older batman version (batman-adv and batctl 2015.2 ) ? > No. Use a recent version (unless you know that this is a regression). > >> and our version is newest version ( Linux alarmpi 4.4.26-1-ARCH ) and hardware platform is raspberry pi B , but >> >> i search wiki , i found kernel 4.4 will usebatman 2015.2 > It just means that kernel 4.4 includes (more or less) batman-adv 2015.2. > You can still use batman-adv 2016.2 as external module for this kernel > version. > > > [...] >> if batman-adv don't support archlinux really , whether ubuntu will support batman-adv . > Hm? This doesn't make a lot of sense. batman-adv doesn't require special > distribution support. It is just a Linux kernel module. You have to find > out what other things (hw/drivers/tc/iptables/...) are causing the > problems on your system. > > And I even know of people that use Arch Linux on their Freifunk supernodes > together with batman-adv. > > Kind regards, > Sven