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RB751G-2HnD wirelless performance
Posted: Fri May 25, 2012 3:46 pm
by jurck
I have some problem with wirelless on RB751G-2HnD. I'm using it as ap-bridge. It was ok for few weeks but now I have ping delays on wirelless some times over 1000 ms and packet loss. There is no traffic on wirelless. I turned on debug for wirelles bot no log. On wired it is ok.
Security is WPA2+EAP.
Any idea?
Re: RB751G-2HnD wirelless performance
Posted: Mon May 28, 2012 8:29 am
by normis
make sure you have latest RouterOS version, then post configuration output from command
Re: RB751G-2HnD wirelless performance
Posted: Mon May 28, 2012 9:20 am
by jurck
I solved the problem, for now. I reset config to default, restore the config from backup and upgraded to lastest version of RouterOS.
Re: RB751G-2HnD wirelless performance
Posted: Sat Jun 02, 2012 12:36 pm
by jurck
Now I upgraded to 5.17 and the problem is here again. I downgraded to 5.16 and reset, then restore the config, but still problem with wifi.
Ping on wifi with 5.17:
Pinging 192.168.1.1 with 32 bytes of data:
Ping statistics for 192.168.1.1:
Packets: Sent = 121, Received = 112, Lost = 9 (7% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 3708ms, Average = 816ms
Ping on wifi with default config in 5.16
Ping statistics for 192.168.88.1:
Packets: Sent = 55, Received = 54, Lost = 1 (1% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 2382ms, Average = 498ms
configuration
# jun/02/2012 11:27:44 by RouterOS 5.16
# software id = 9E9T-2X63
#
/interface bridge
add admin-mac=D4:CA:6D:25:FD:C9 arp=proxy-arp auto-mac=no l2mtu=1598 name=bridge-local protocol-mode=rstp
/interface ethernet
set 0 name=ether1-gateway
set 1 arp=proxy-arp name=ether2-master-local speed=1Gbps
set 2 master-port=ether2-master-local name=ether3-slave-local speed=1Gbps
set 3 master-port=ether2-master-local name=ether4-slave-local
set 4 master-port=ether2-master-local name=ether5-slave-local
/interface wireless
set 0 band=2ghz-b/g/n channel-width=20/40mhz-ht-above country=slovenia disabled=no ht-rxchains=0,1 ht-supported-mcs=\
mcs-0,mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7,mcs-8,mcs-9,mcs-10,mcs-11,mcs-12,mcs-13,mcs-14,mcs-15 ht-txchains=0,1 \
l2mtu=2290 mode=ap-bridge ssid=tsunami wireless-protocol=802.11
/interface wireless security-profiles
set [ find default=yes ] authentication-types=wpa2-psk eap-methods=passthrough mode=dynamic-keys wpa-pre-shared-key=\
*** wpa2-pre-shared-key=***
/ip hotspot user profile
set [ find default=yes ] idle-timeout=none keepalive-timeout=2m
/ip pool
add name=default-dhcp ranges=192.168.1.100-192.168.1.254
/ip dhcp-server
add address-pool=default-dhcp disabled=no interface=bridge-local name=default
/ipv6 dhcp-server
add address-pool=pool6 authoritative=yes disabled=no interface=bridge-local name=dhcp6
/ipv6 pool
add name=pool6 prefix=2001:x:x:x::/64 prefix-length=65
/interface wireless connect-list
add interface=wlan1 mac-address=98:0C:82:2B:B7:8A
/interface wireless snooper
set receive-errors=yes
/ip address
add address=192.168.88.1/24 comment="default configuration" interface=bridge-local
add address=x.x.x.x/x interface=ether1-gateway
add address=192.168.1.1/24 interface=bridge-local
/ip dhcp-client
add comment="default configuration" interface=ether1-gateway
/ip dhcp-server network
add address=192.168.1.0/24 comment="default configuration" \
gateway=192.168.1.1
/ip dns static
add address=192.168.88.1 name=router
/ip neighbor discovery
set ether1-gateway disabled=yes
set wlan1 disabled=yes
/ip proxy access
add src-address=192.168.0.0/24
add action=deny dst-port=23-25
add action=deny
/ip route
add distance=1 gateway=ether1-gateway
/ip traffic-flow
set interfaces=ether1-gateway
/ip upnp
set allow-disable-external-interface=no enabled=yes
/ip upnp interfaces
add interface=ether2-master-local type=internal
add interface=ether1-gateway type=external
/ipv6 address
add address=2001:x:x:x::2/64 advertise=no interface=sit1
add address=2001:x:x:x::1/64 interface=bridge-local
/system leds
set 0 interface=wlan1
/tool mac-server
add disabled=no interface=ether2-master-local
add disabled=no interface=ether3-slave-local
add disabled=no interface=ether4-slave-local
add disabled=no interface=ether5-slave-local
add disabled=no interface=wlan1
add disabled=no interface=bridge-local
/tool mac-server mac-winbox
set [ find default=yes ] disabled=yes
add interface=ether2-master-local
add interface=ether3-slave-local
add interface=ether4-slave-local
add interface=ether5-slave-local
add interface=wlan1
add interface=bridge-local
Re: RB751G-2HnD wirelless performance
Posted: Mon Jun 04, 2012 5:39 pm
by uldis
what else has changed since it was working ok for few weeks? maybe you installed a new router on 2.4ghz near this one?
Re: RB751G-2HnD wirelless performance
Posted: Mon Jun 04, 2012 7:07 pm
by jurck
Nothing changed. I have only this router.
Re: RB751G-2HnD wirelless performance
Posted: Mon Jun 04, 2012 7:41 pm
by webscientist
Nothing changed. I have only this router.
maybe someone else did? have you checked wireless spectrum noise?
sometime simply changing band greatly help.
Re: RB751G-2HnD wirelless performance
Posted: Mon Jun 04, 2012 7:49 pm
by jurck
yes I checked. As you can see on this forum, I'm not only one who have this problem.
Re: RB751G-2HnD wirelless performance
Posted: Mon Jun 04, 2012 8:56 pm
by mikko
What kind client do you have? I dont have that board, but others with 52n cards. I have seen bad wireless performance with old broadcom G chipsets if preamble if set both or short. With long preamble my laptops with old broadcom radios work ok.
And run spectrum scan in dude. I have had problems with some customers that have analog wireless security cameras in 2.4 GHz band. Even one of those cameras can fill half of 2.4 GHz spectrum.
Re: RB751G-2HnD wirelless performance
Posted: Mon Jun 04, 2012 9:41 pm
by ohara
jurck, test the attached settings and say if it makes a difference. I get good results in my small flat. ROS 5.17, FW 2.38, devices with static IP from DHCP. I just have a different software ID than you. Only thing that I am wondering about is why devices don't connect at more than 65/65Mbps.