Hi all,
Can anyone confirm if this is a known issue, or if I’m doing something stupid. When using NV2, a client associating / disassociating to the AP will cause packet loss for all other users for ~5 seconds. When using 802.11 or nstreme, there’s no issue.
This is a lab setup, prior to rolling out in production. I have 2 CPE’s (SXT Lite5 v6.20) and an AP (SXT 5ac-SA v6.20). Everything is more or less at factory defaults, only modification is to set 40mhz channel width, set NV2 as the protocol, and set N-only on the AP.
Both CPE’s associate to the AP fine and throughput is good. Data rates are MCS15 / 300mbps on both chains and CCQ is high (90-100%).
CPE1 and CPE2 look like this, running a 30mbps bandwidth test and 500ms ping:
When I disconnect CPE2, CPE1 sees a lot of packet loss (but stays associated) and then recovers after about 5 seconds.
When I reconnect CPE2 again, CPE1 against sees a lot of packet loss (but stays associated) and recovers gradually over a few seconds.
Couple of points to note - this is a lab, so yes the signals are hot. I tried with some attenuation and signals around -50 mark and same results. The AP is a 5ac, but is running in N-only mode. I tried with a non-AC AP and same results. Using wireless-fp across all systems.
If I use 802.11 or nstreme this issue does not exist. With NV2 I see this issue. Obviously this screws with existing client traffic (e.g.: voip) when installing or removing customers (or if there is a dodgy radio on the sector).
AP Config:
jan/02/1970 01:53:11 by RouterOS 6.20
software id = X
/interface wireless
set [ find default-name=wlan1 ] band=5ghz-onlyn channel-width=20/40mhz-Ce
disabled=no l2mtu=1600 mode=ap-bridge tx-power=-10 tx-power-mode=
all-rates-fixed wireless-protocol=nv2
/system logging action
set 2 remember=yes
/ip address
add address=192.168.1.33/24 interface=ether1 network=192.168.1.0
add address=10.1.1.3/24 interface=wlan1 network=10.1.1.0
/ip upnp
set allow-disable-external-interface=no
/snmp
set trap-community=public
/system leds
set 0 interface=wlan1
/system routerboard settings
set cpu-frequency=720MHzCPE Config:
jan/02/1970 01:55:34 by RouterOS 6.20
software id = X
/interface wireless
set [ find default-name=wlan1 ] band=5ghz-onlyn channel-width=20/40mhz-Ce
disabled=no l2mtu=1600 scan-list=5180 ssid=MikroTik tx-power=0
tx-power-mode=all-rates-fixed
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
/system logging action
set 2 remember=yes
/ip address
add address=192.168.1.91/24 interface=ether1 network=192.168.1.0
add address=10.1.1.2/24 interface=wlan1 network=10.1.1.0
/ip upnp
set allow-disable-external-interface=no
/snmp
set trap-community=public
/system identity
set name=CPE2
/system leds
set 0 interface=wlan1Any suggestions?
Cheers,
Rich