24 Feb
2019
24 Feb
'19
8:48 p.m.
hi,
this mail would be my first post to the list so for a starter i would like
to thank to the project owners, contributors and the community for the great
work being done and appreciate the effort and time being spent for this piece of
software like it is said software is hard.
the main reason i am writing is as follows;
for about 10 months i have been experimenting with batman on various platforms
my current platform is ti's beagleboneblack wireless board running openwrt
distribution (the required bbbw dtb and wl1835 driver firmware applied) with
batman enabled and configured. with this high level description of the
components i am able to build a mesh network 6 nodes (i.e. bbbw cards) but as
soon as i introduce a 7th card into the network batman mesh becomes unresponsive
as the last seen times start to increase and finally, after 200 seconds all the
nodes drops from the originator and neighbor tables which could be inspected
with < :#batctl o> and < :#batctl n> commands respectively. all the cards are
on
the same table and well powered.
i would like to give some details about the
configurations of the cards which are identical except the ip addresses
////////////////////////////////////////////////////////////////////////////////
root@OpenWrt:/# cat /etc/config/wireless
config wifi-device 'radio0'
option type 'mac80211'
option channel '11'
option hwmode '11g'
option path
'platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1:1.0'
option htmode 'HT20'
option disabled '1'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'wifi'
option mode 'mesh'
option ssid 'my-mesh-network'
option mesh_id '02:12:34:56:78:9A'
config wifi-device 'radio1'
option type 'mac80211'
option channel '3'
option hwmode '11n'
option path
'platform/ocp/47810000.mmc/mmc_host/mmc2/mmc2:0001/mmc2:0001:2/wl18xx.0.auto'
option htmode 'HT40+'
option disabled '0'
config wifi-iface 'wmesh'
option device 'radio1'
option ifname 'adhoc0'
option network 'bat0_hardif_wlan'
option mode 'mesh'
option ssid 'mesh'
option mesh_fwding '0'
option 'mcast_rate' '18000'
option bssid '02:12:34:56:78:9A'
////////////////////////////////////////////////////////////////////////////////
root@OpenWrt:/# cat /etc/config/network
config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'fd99:5d77:fecc::/48'
config interface 'bat0_hardif_wlan'
option ifname 'adhoc0'
option mtu '2304'
option proto 'batadv'
option mesh 'bat0'
option ipaddr '192.168.3.100'
option netmask '255.255.255.0'
option routing_algo 'BATMAN_IV'
option ap_isolation '1'
////////////////////////////////////////////////////////////////////////////////
root@OpenWrt:/# cat /etc/config/batman-adv
config 'mesh' 'bat0'
option 'aggregated_ogms' 1
option 'ap_isolation' 1
#option 'bonding' 0
option 'fragmentation' 1
#option 'gw_bandwidth' '10000/2000'
option 'gw_mode' 'off'
#option 'gw_sel_class' 20
option 'log_level' 15
option 'orig_interval' 1000
option 'bridge_loop_avoidance' 0
option 'distributed_arp_table' 0
option 'multicast_mode' 0
optiion 'network_coding' 0
option 'hop_penalty' 15
#option 'isolation_mark' '0x00000000/0x00000000'
# yet another batX instance
# config 'mesh' 'bat5'
////////////////////////////////////////////////////////////////////////////////
root@OpenWrt:/# ifconfig
adhoc0 Link encap:Ethernet HWaddr 38:D2:69:DC:DE:43
inet6 addr: fe80::3ad2:69ff:fedc:de43/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:2304 Metric:1
RX packets:5924 errors:0 dropped:0 overruns:0 frame:0
TX packets:3707 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:370268 (361.5 KiB) TX bytes:327332 (319.6 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:480 errors:0 dropped:0 overruns:0 frame:0
TX packets:480 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:39360 (38.4 KiB) TX bytes:39360 (38.4 KiB)
///////////////////// 6 node setup with 5 direct neighbors /////////////////////
root@OpenWrt:/# batctl o
[B.A.T.M.A.N. adv openwrt-2019.0-0, MainIF/MAC:
adhoc0/38:d2:69:dc:de:43 (bat0/6a:40:89:aa:93:a0 BATMAN_IV)]
Originator last-seen (#/255) Nexthop [outgoingIF]
38:d2:69:e0:c3:0d 0.010s (218) 38:d2:69:e0:5e:de [ adhoc0]
38:d2:69:e0:c3:0d 0.010s (211) 98:84:e3:f0:a5:38 [ adhoc0]
38:d2:69:e0:c3:0d 0.010s (214) 38:d2:69:e0:8f:87 [ adhoc0]
38:d2:69:e0:c3:0d 0.010s (222) 38:d2:69:e0:71:73 [ adhoc0]
* 38:d2:69:e0:c3:0d 0.010s (255) 38:d2:69:e0:c3:0d [ adhoc0]
98:84:e3:f0:a5:38 0.700s (225) 38:d2:69:e0:c3:0d [ adhoc0]
98:84:e3:f0:a5:38 0.700s (221) 38:d2:69:e0:5e:de [ adhoc0]
98:84:e3:f0:a5:38 0.700s (225) 38:d2:69:e0:71:73 [ adhoc0]
98:84:e3:f0:a5:38 0.700s (222) 38:d2:69:e0:8f:87 [ adhoc0]
* 98:84:e3:f0:a5:38 0.700s (247) 98:84:e3:f0:a5:38 [ adhoc0]
38:d2:69:e0:8f:87 0.030s (214) 38:d2:69:e0:c3:0d [ adhoc0]
38:d2:69:e0:8f:87 0.030s (221) 38:d2:69:e0:5e:de [ adhoc0]
38:d2:69:e0:8f:87 0.030s (217) 98:84:e3:f0:a5:38 [ adhoc0]
38:d2:69:e0:8f:87 0.030s (225) 38:d2:69:e0:71:73 [ adhoc0]
* 38:d2:69:e0:8f:87 0.030s (255) 38:d2:69:e0:8f:87 [ adhoc0]
38:d2:69:e0:71:73 0.460s (200) 38:d2:69:e0:c3:0d [ adhoc0]
38:d2:69:e0:71:73 0.460s (197) 38:d2:69:e0:5e:de [ adhoc0]
38:d2:69:e0:71:73 0.460s (200) 98:84:e3:f0:a5:38 [ adhoc0]
38:d2:69:e0:71:73 0.460s (210) 38:d2:69:e0:8f:87 [ adhoc0]
* 38:d2:69:e0:71:73 0.460s (255) 38:d2:69:e0:71:73 [ adhoc0]
38:d2:69:e0:5e:de 0.180s (225) 38:d2:69:e0:c3:0d [ adhoc0]
38:d2:69:e0:5e:de 0.180s (215) 98:84:e3:f0:a5:38 [ adhoc0]
38:d2:69:e0:5e:de 0.180s (218) 38:d2:69:e0:8f:87 [ adhoc0]
38:d2:69:e0:5e:de 0.180s (225) 38:d2:69:e0:71:73 [ adhoc0]
* 38:d2:69:e0:5e:de 0.180s (251) 38:d2:69:e0:5e:de [ adhoc0]
root@OpenWrt:/# batctl n
[B.A.T.M.A.N. adv openwrt-2019.0-0, MainIF/MAC:
adhoc0/38:d2:69:dc:de:43 (bat0/6a:40:89:aa:93:a0 BATMAN_IV)]
IF Neighbor last-seen
adhoc0 38:d2:69:e0:c3:0d 0.160s
adhoc0 38:d2:69:e0:5e:de 0.320s
adhoc0 98:84:e3:f0:a5:38 0.830s
adhoc0 38:d2:69:e0:8f:87 0.030s
adhoc0 38:d2:69:e0:71:73 0.630s
////////////////////////////////////////////////////////////////////////////////
root@OpenWrt:/# iw dev adhoc0 station dump
Station 38:d2:69:e0:71:73 (on adhoc0)
inactive time: 80 ms
rx bytes: 1775733
rx packets: 22623
tx bytes: 539
tx packets: 7
tx retries: 0
tx failed: 0
rx drop misc: 12797
signal: 0 dBm
signal avg: -21 dBm
tx bitrate: 72.2 MBit/s MCS 7 short GI
rx bitrate: 65.0 MBit/s MCS 7
expected throughput: 27.343Mbps
mesh llid: 32171
mesh plid: 13983
mesh plink: ESTAB
mesh local PS mode: ACTIVE
mesh peer PS mode: ACTIVE
mesh non-peer PS mode: ACTIVE
authorized: yes
authenticated: yes
associated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
DTIM period: 2
beacon interval:100
short slot time:yes
connected time: 491 seconds
Station 38:d2:69:e0:8f:87 (on adhoc0)
inactive time: 20 ms
rx bytes: 1693321
rx packets: 21651
tx bytes: 329
tx packets: 4
tx retries: 0
tx failed: 0
rx drop misc: 12018
signal: 0 dBm
signal avg: -25 dBm
Toffset: 18446744071111214636 us
tx bitrate: 1.0 MBit/s
expected throughput: 121.93Mbps
mesh llid: 30373
mesh plid: 56485
mesh plink: ESTAB
mesh local PS mode: ACTIVE
mesh peer PS mode: UNKNOWN
mesh non-peer PS mode: ACTIVE
authorized: yes
authenticated: yes
associated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
DTIM period: 2
beacon interval:100
short slot time:yes
connected time: 489 seconds
Station 98:84:e3:f0:a5:38 (on adhoc0)
inactive time: 50 ms
rx bytes: 1640523
rx packets: 21040
tx bytes: 716
tx packets: 8
tx retries: 0
tx failed: 0
rx drop misc: 11384
signal: 0 dBm
signal avg: -27 dBm
tx bitrate: 72.2 MBit/s MCS 7 short GI
rx bitrate: 65.0 MBit/s MCS 7
expected throughput: 140.625Mbps
mesh llid: 25917
mesh plid: 65422
mesh plink: ESTAB
mesh local PS mode: ACTIVE
mesh peer PS mode: ACTIVE
mesh non-peer PS mode: ACTIVE
authorized: yes
authenticated: yes
associated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
DTIM period: 2
beacon interval:100
short slot time:yes
connected time: 487 seconds
Station 38:d2:69:e0:5e:de (on adhoc0)
inactive time: 70 ms
rx bytes: 1580918
rx packets: 20324
tx bytes: 480
tx packets: 6
tx retries: 0
tx failed: 0
rx drop misc: 10662
signal: 0 dBm
signal avg: -34 dBm
Toffset: 18446744071107370820 us
tx bitrate: 72.2 MBit/s MCS 7 short GI
rx bitrate: 65.0 MBit/s MCS 7
expected throughput: 140.625Mbps
mesh llid: 52541
mesh plid: 55210
mesh plink: ESTAB
mesh local PS mode: ACTIVE
mesh peer PS mode: ACTIVE
mesh non-peer PS mode: ACTIVE
authorized: yes
authenticated: yes
associated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
DTIM period: 2
beacon interval:100
short slot time:yes
connected time: 485 seconds
Station 38:d2:69:e0:c3:0d (on adhoc0)
inactive time: 60 ms
rx bytes: 1605955
rx packets: 20603
tx bytes: 480
tx packets: 6
tx retries: 0
tx failed: 0
rx drop misc: 11110
signal: 0 dBm
signal avg: -26 dBm
Toffset: 18446744071104088264 us
tx bitrate: 72.2 MBit/s MCS 7 short GI
rx bitrate: 65.0 MBit/s MCS 7
expected throughput: 140.625Mbps
mesh llid: 36132
mesh plid: 36029
mesh plink: ESTAB
mesh local PS mode: ACTIVE
mesh peer PS mode: ACTIVE
mesh non-peer PS mode: ACTIVE
authorized: yes
authenticated: yes
associated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
DTIM period: 2
beacon interval:100
short slot time:yes
connected time: 481 seconds
////////////////////////////////////////////////////////////////////////////////
at this point everything is fine i can level 2 ping each neighbor etc. but when
i boot up the 6th neighbor (i.e. 7th node in the mesh network) last-seen values
start to increase and finally nodes disappear
////////////////////////////////////////////////////////////////////////////////
root@OpenWrt:/# batctl o
[B.A.T.M.A.N. adv openwrt-2019.0-0, MainIF/MAC:
adhoc0/38:d2:69:dc:de:43 (bat0/6a:40:89:aa:93:a0 BATMAN_IV)]
Originator last-seen (#/255) Nexthop [outgoingIF]
38:d2:69:e0:c3:0d 97.200s (225) 38:d2:69:e0:5e:de [ adhoc0]
38:d2:69:e0:c3:0d 97.200s (222) 98:84:e3:f0:a5:38 [ adhoc0]
38:d2:69:e0:c3:0d 97.200s (214) 38:d2:69:e0:8f:87 [ adhoc0]
38:d2:69:e0:c3:0d 97.200s (225) 38:d2:69:e0:71:73 [ adhoc0]
* 38:d2:69:e0:c3:0d 97.200s (251) 38:d2:69:e0:c3:0d [ adhoc0]
98:84:e3:f0:a5:38 100.970s (221) 38:d2:69:e0:c3:0d [ adhoc0]
98:84:e3:f0:a5:38 100.970s (225) 38:d2:69:e0:5e:de [ adhoc0]
98:84:e3:f0:a5:38 100.970s (225) 38:d2:69:e0:71:73 [ adhoc0]
98:84:e3:f0:a5:38 100.970s (214) 38:d2:69:e0:8f:87 [ adhoc0]
* 98:84:e3:f0:a5:38 100.970s (255) 98:84:e3:f0:a5:38 [ adhoc0]
38:d2:69:e0:8f:87 100.170s (221) 38:d2:69:e0:c3:0d [ adhoc0]
38:d2:69:e0:8f:87 100.170s (225) 38:d2:69:e0:5e:de [ adhoc0]
38:d2:69:e0:8f:87 100.170s (225) 98:84:e3:f0:a5:38 [ adhoc0]
38:d2:69:e0:8f:87 100.170s (225) 38:d2:69:e0:71:73 [ adhoc0]
* 38:d2:69:e0:8f:87 100.170s (255) 38:d2:69:e0:8f:87 [ adhoc0]
38:d2:69:e0:71:73 18.750s ( 0) 38:d2:69:e0:c3:0d [ adhoc0]
38:d2:69:e0:71:73 18.750s ( 0) 38:d2:69:e0:5e:de [ adhoc0]
38:d2:69:e0:71:73 18.750s ( 0) 98:84:e3:f0:a5:38 [ adhoc0]
38:d2:69:e0:71:73 18.750s ( 0) 38:d2:69:e0:8f:87 [ adhoc0]
* 38:d2:69:e0:71:73 18.750s ( 12) 38:d2:69:e0:71:73 [ adhoc0]
38:d2:69:e0:5e:de 93.200s (218) 38:d2:69:e0:c3:0d [ adhoc0]
38:d2:69:e0:5e:de 93.200s ( 0) 98:84:e3:f0:a5:38 [ adhoc0]
38:d2:69:e0:5e:de 93.200s ( 0) 38:d2:69:e0:8f:87 [ adhoc0]
38:d2:69:e0:5e:de 93.200s (211) 38:d2:69:e0:71:73 [ adhoc0]
* 38:d2:69:e0:5e:de 93.200s (247) 38:d2:69:e0:5e:de [ adhoc0]
root@OpenWrt:/# batctl n
[B.A.T.M.A.N. adv openwrt-2019.0-0, MainIF/MAC:
adhoc0/38:d2:69:dc:de:43 (bat0/6a:40:89:aa:93:a0 BATMAN_IV)]
IF Neighbor last-seen
adhoc0 38:d2:69:e0:c3:0d 121.780s
adhoc0 38:d2:69:e0:5e:de 117.780s
adhoc0 98:84:e3:f0:a5:38 125.560s
adhoc0 38:d2:69:e0:8f:87 124.750s
adhoc0 38:d2:69:e0:71:73 43.210s
////////////////////////////////////////////////////////////////////////////////
at this point the neighbors are giong to dissapear after 200 sec timeout but
the command < :#iw dev adhoc0 station dump> list all the nodes plink established
////////////////////////////////////////////////////////////////////////////////
root@OpenWrt:/# iw dev adhoc0 station dump
Station 38:d2:69:e0:71:73 (on adhoc0)
inactive time: 90 ms
rx bytes: 3864389
rx packets: 49751
tx bytes: 539
tx packets: 7
tx retries: 0
tx failed: 0
rx drop misc: 26681
signal: 0 dBm
signal avg: -21 dBm
tx bitrate: 72.2 MBit/s MCS 7 short GI
rx bitrate: 65.0 MBit/s MCS 7
expected throughput: 27.343Mbps
mesh llid: 32171
mesh plid: 13983
mesh plink: ESTAB
mesh local PS mode: ACTIVE
mesh peer PS mode: ACTIVE
mesh non-peer PS mode: ACTIVE
authorized: yes
authenticated: yes
associated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
DTIM period: 2
beacon interval:100
short slot time:yes
connected time: 1159 seconds
Station 38:d2:69:e0:8f:87 (on adhoc0)
inactive time: 30 ms
rx bytes: 3690399
rx packets: 47696
tx bytes: 329
tx packets: 4
tx retries: 0
tx failed: 0
rx drop misc: 24935
signal: 0 dBm
signal avg: -24 dBm
tx bitrate: 1.0 MBit/s
expected throughput: 3.906Mbps
mesh llid: 30373
mesh plid: 56485
mesh plink: ESTAB
mesh local PS mode: ACTIVE
mesh peer PS mode: UNKNOWN
mesh non-peer PS mode: ACTIVE
authorized: yes
authenticated: yes
associated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
DTIM period: 2
beacon interval:100
short slot time:yes
connected time: 1157 seconds
Station 98:84:e3:f0:a5:38 (on adhoc0)
inactive time: 60 ms
rx bytes: 3622627
rx packets: 46907
tx bytes: 716
tx packets: 8
tx retries: 0
tx failed: 0
rx drop misc: 24144
signal: 0 dBm
signal avg: -25 dBm
Toffset: 18446744071109913820 us
tx bitrate: 72.2 MBit/s MCS 7 short GI
rx bitrate: 65.0 MBit/s MCS 7
expected throughput: 140.625Mbps
mesh llid: 25917
mesh plid: 65422
mesh plink: ESTAB
mesh local PS mode: ACTIVE
mesh peer PS mode: ACTIVE
mesh non-peer PS mode: ACTIVE
authorized: yes
authenticated: yes
associated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
DTIM period: 2
beacon interval:100
short slot time:yes
connected time: 1155 seconds
Station 38:d2:69:e0:5e:de (on adhoc0)
inactive time: 80 ms
rx bytes: 3489728
rx packets: 45344
tx bytes: 480
tx packets: 6
tx retries: 0
tx failed: 0
rx drop misc: 22514
signal: 0 dBm
signal avg: -31 dBm
Toffset: 18446744071107371412 us
tx bitrate: 72.2 MBit/s MCS 7 short GI
rx bitrate: 65.0 MBit/s MCS 7
expected throughput: 140.625Mbps
mesh llid: 52541
mesh plid: 55210
mesh plink: ESTAB
mesh local PS mode: ACTIVE
mesh peer PS mode: ACTIVE
mesh non-peer PS mode: ACTIVE
authorized: yes
authenticated: yes
associated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
DTIM period: 2
beacon interval:100
short slot time:yes
connected time: 1153 seconds
Station 38:d2:69:e0:c3:0d (on adhoc0)
inactive time: 80 ms
rx bytes: 3585647
rx packets: 46475
tx bytes: 480
tx packets: 6
tx retries: 0
tx failed: 0
rx drop misc: 23601
signal: 0 dBm
signal avg: -25 dBm
Toffset: 18446744071104087603 us
tx bitrate: 72.2 MBit/s MCS 7 short GI
rx bitrate: 65.0 MBit/s MCS 7
expected throughput: 140.625Mbps
mesh llid: 36132
mesh plid: 36029
mesh plink: ESTAB
mesh local PS mode: ACTIVE
mesh peer PS mode: ACTIVE
mesh non-peer PS mode: ACTIVE
authorized: yes
authenticated: yes
associated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
DTIM period: 2
beacon interval:100
short slot time:yes
connected time: 1149 seconds
Station 38:d2:69:cd:86:96 (on adhoc0)
inactive time: 60 ms
rx bytes: 195354
rx packets: 3004
tx bytes: 270
tx packets: 3
tx retries: 0
tx failed: 0
rx drop misc: 3
signal: 0 dBm
signal avg: -41 dBm
Toffset: 18446744070115910174 us
tx bitrate: 1.0 MBit/s
expected throughput: 70.312Mbps
mesh llid: 25879
mesh plid: 29955
mesh plink: ESTAB
mesh local PS mode: ACTIVE
mesh peer PS mode: UNKNOWN
mesh non-peer PS mode: ACTIVE
authorized: yes
authenticated: yes
associated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
DTIM period: 2
beacon interval:100
short slot time:yes
connected time: 161 seconds
////////////////////////////////////////////////////////////////////////////////
and finally
////////////////////////////////////////////////////////////////////////////////
root@OpenWrt:/# batctl o
[B.A.T.M.A.N. adv openwrt-2019.0-0, MainIF/MAC:
adhoc0/38:d2:69:dc:de:43 (bat0/6a:40:89:aa:93:a0 BATMAN_IV)]
Originator last-seen (#/255) Nexthop [outgoingIF]
////////////////////////////////////////////////////////////////////////////////
i researched for a while for the cause with no avail. i would appreciate any
kind of help to point me to the right direction to solve this.
ps: i can provide more detail explanation, configuration and logs i you could
tell me which
thank you in advance.
24 Feb
24 Feb
9:22 p.m.
On Sunday, 24 February 2019 21:48:18 CET umut deniz wrote:
my current platform is ti's beagleboneblack
wireless board running openwrt
distribution (the required bbbw dtb and wl1835 driver firmware applied) with
batman enabled and configured. with this high level description of the
components i am able to build a mesh network 6 nodes (i.e. bbbw cards) but as
soon as i introduce a 7th card into the network batman mesh becomes unresponsive
as the last seen times start to increase and finally, after 200 seconds all the
nodes drops from the originator and neighbor tables which could be inspected
with < :#batctl o> and < :#batctl n> commands respectively. all the cards are
on
the same table and well powered.
[...]
i researched for a while for the cause with no avail.
i would appreciate any
kind of help to point me to the right direction to solve this.
Please don't use things like wl1835 when building larger meshes. It is known
that these kind of devices only support a very limited amount of peers and
are most of the time only (more or less) stable in management mode (client).
And afaik, the wlcore driver (like other TI wirelss drivers) is also orphaned.
If you're wifi link/driver doesn't work, batman-adv can also do nothing to fix
it.
Rule of thumb: If it is a USB/SDIO wifi device, start waving your hands in the
air, scream and run away. This strategy is also helpful in other wifi related
situations.
Kind regards,
Sven
25 Feb
25 Feb
2:06 p.m.
Hello Sven,
Thank your for your swift reply and advice. As you said TI supports limited
number of peers with its driver and hardware in mesh mode. According to TI
documentation it is 32 nodes. The question bogging my mind is how could the
< :#iw dev adhoc0 station dump > command return 6 active and plink established
nodes (with inactive times around 80ms) while batman-adv's last-seen is
increasing till timeout occurs on all neighbors and after timeout iw station
dump still reports the same active stations (with inactive times around 80ms).
Am I missing something to debug or a log to look in to or a configuration
tied with batman-adv needed to be made.
Thank you and best regards
On Mon, Feb 25, 2019 at 12:22 AM Sven Eckelmann <sven(a)narfation.org> wrote:
On Sunday, 24 February 2019 21:48:18 CET umut deniz wrote:
my current platform is ti's beagleboneblack
wireless board running openwrt
distribution (the required bbbw dtb and wl1835 driver firmware applied) with
batman enabled and configured. with this high level description of the
components i am able to build a mesh network 6 nodes (i.e. bbbw cards) but as
soon as i introduce a 7th card into the network batman mesh becomes unresponsive
as the last seen times start to increase and finally, after 200 seconds all the
nodes drops from the originator and neighbor tables which could be inspected
with < :#batctl o> and < :#batctl n> commands respectively. all the cards are
on
the same table and well powered.
[...]
i researched for a while for the cause with no
avail. i would appreciate any
kind of help to point me to the right direction to solve this.
Please don't use things like wl1835 when building larger meshes. It is known
that these kind of devices only support a very limited amount of peers and
are most of the time only (more or less) stable in management mode (client).
And afaik, the wlcore driver (like other TI wirelss drivers) is also orphaned.
If you're wifi link/driver doesn't work, batman-adv can also do nothing to fix
it.
Rule of thumb: If it is a USB/SDIO wifi device, start waving your hands in the
air, scream and run away. This strategy is also helpful in other wifi related
situations.
Kind regards,
Sven
2:19 p.m.
On Monday, 25 February 2019 15:06:21 CET umut deniz wrote:
[...]
Thank your for your swift reply and advice. As you
said TI supports limited
number of peers with its driver and hardware in mesh mode. According to TI
documentation it is 32 nodes.
I think this is the number of nodes in a complete 802.11s mesh. This doesn't
mean that it supports these number of direct peers the driver can't even
represent more than 16 direct peers/links in its structures. I heard something
of 10 peers supported by the firmware when running in AP mode. Most likely
lower or equal in meshpoint mode.
And maybe it also needs some special peers to work correctly. Wouldn't be the
first firmware which needs such kind of hacks.
The question bogging my mind is how could the
< :#iw dev adhoc0 station dump > command return 6 active and plink established
nodes (with inactive times around 80ms) while batman-adv's last-seen is
increasing till timeout occurs on all neighbors and after timeout iw station
dump still reports the same active stations (with inactive times around 80ms).
Am I missing something to debug or a log to look in to or a configuration
tied with batman-adv needed to be made.
If the last time increases, this means that the lower link doesn't do correct
broadcast anymore between the peers. The numbers you see in iw can be from any
kind of frame (there might be exceptions - check the ieee80211 subsystem for
details).
This can either be a bug in the TI firmware or driver or maybe this is their
expected behavior when going over a specific number of entries. But there is
nothing batman-adv can do when the broadcast doesn't work correctly.
B.A.T.M.A.N. IV's metric is build around the broadcast frames and also
B.A.T.M.A.N. V needs them for local discovery.
Kind regards,
Sven
4 p.m.
On Mon, Feb 25, 2019 at 05:06:21PM +0300, umut deniz wrote:
Hello Sven,
Thank your for your swift reply and advice. As you said TI supports limited
number of peers with its driver and hardware in mesh mode. According to TI
documentation it is 32 nodes. The question bogging my mind is how could the
< :#iw dev adhoc0 station dump > command return 6 active and plink established
nodes (with inactive times around 80ms) while batman-adv's last-seen is
increasing till timeout occurs on all neighbors and after timeout iw station
dump still reports the same active stations (with inactive times around 80ms).
Am I missing something to debug or a log to look in to or a configuration
tied with batman-adv needed to be made.
Disable batman-adv and try a broadcast ping like "ping6 ff02::1%adhoc0" and
unicast ones. If that works with 6 nodes, but not with 7 ones then you
know it's not batman-adv's fault.
Regards, Linus
4:50 p.m.
On Monday, 25 February 2019 17:00:46 CET Linus Lüssing wrote:
[...]
Disable batman-adv and try a broadcast ping like
"ping6 ff02::1%adhoc0" and
unicast ones. If that works with 6 nodes, but not with 7 ones then you
know it's not batman-adv's fault.
This is only true when the driver/firmware handles multicast frames as
broadcasts. I have already seen some of them converting the multicast/unicast
frames to unicast frames in such situations. This also broke OGM detection on
batman-adv because we only accept broadcast OGMs received as broadcast -
otherwise the OGM metric stuff wouldn't make any sense at all.
And you have to do this in both directions to check whether bidirectional
links are available. A ping6 answer (icmp echo reply) is unicast - and you
also need the check the broadcast stuff in both direction.
But yes, when even this test fails then it is definitely not batman-adv's
fault. Just keep in mind that a working ping6 doesn't have to mean that it is
batman-adv's fault.
Kind regard,
Sven
1494
days inactive
1495
days old
b.a.t.m.a.n@lists.open-mesh.org
5 comments
3 participants
participants (3)
-
Linus Lüssing -
Sven Eckelmann -
umut deniz