high ping time

RouterOS Wireless Networking
1

Hi all.
I have some problems of high ping from a cpe to a base station (all mikrotik+atheros+3.18):
the signal is good, the ccq is very good (95%) but the ping is 25ms.
Summing other latency, the telephone (and the fax) have a lot of problems.
Could some parameters be modified to try to speed up the ping ?
Which could I try ?

Thanks

This is the configurazion of my CPE wlan:

/interface wireless
set 0 ack-timeout=dynamic adaptive-noise-immunity=client-mode
allow-sharedkey=no antenna-gain=17 antenna-mode=ant-a area=“” arp=enabled
band=5ghz basic-rates-a/g=6Mbps basic-rates-b=1Mbps burst-time=disabled
comment=RadioSlave compression=no country=italy default-ap-tx-limit=0
default-authentication=yes default-client-tx-limit=0 default-forwarding=
yes dfs-mode=none disable-running-check=no disabled=no
disconnect-timeout=3s frame-lifetime=0 frequency=5600 frequency-mode=
regulatory-domain hide-ssid=yes hw-retries=4 mac-address=
00:0C:4F:1F:FF:F2 max-station-count=2007 mode=station mtu=1500 name=wlan1
noise-floor-threshold=default on-fail-retry-time=100ms
periodic-calibration=enabled periodic-calibration-interval=60
preamble-mode=short proprietary-extensions=post-2.9.25 radio-name=ran223
rate-set=default scan-list=
5500,5520,5540,5560,5580,5600,5620,5640,5660,5680,5700 security-profile=
WPA-PSK-MILLIWAY ssid=MILLIWAYhl_17 station-bridge-clone-mac=
00:00:00:00:00:00 supported-rates-a/g=
6Mbps,9Mbps,12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps supported-rates-b=
1Mbps,2Mbps,5.5Mbps,11Mbps tx-power-mode=default update-stats-interval=
disabled wds-cost-range=50-150 wds-default-bridge=none wds-default-cost=
100 wds-ignore-ssid=no wds-mode=disabled wmm-support=disabled

/interface wireless manual-tx-power-table
set wlan1 comment=RadioSlave manual-tx-powers=“1Mbps:17,2Mbps:17,5.5Mbps:17,11
Mbps:17,6Mbps:17,9Mbps:17,12Mbps:17,18Mbps:17,24Mbps:17,36Mbps:17,48Mbps:1
7,54Mbps:17,HT20-1:0,HT20-2:0,HT20-3:0,HT20-4:0,HT20-5:0,HT20-6:0,HT20-7:0
,HT20-8:0,HT40-1:0,HT40-2:0,HT40-3:0,HT40-4:0,HT40-5:0,HT40-6:0,HT40-7:0,H
T40-8:0”

/interface wireless nstreme
set wlan1 comment=RadioSlave disable-csma=no enable-nstreme=yes
enable-polling=yes framer-limit=3600 framer-policy=exact-size

/interface wireless align
set active-mode=yes audio-max=-20 audio-min=-100 audio-monitor=
00:00:00:00:00:00 filter-mac=00:00:00:00:00:00 frame-size=300
frames-per-second=25 receive-all=no ssid-all=no

/interface wireless sniffer
set channel-time=200ms file-limit=10 file-name=“” memory-limit=10
multiple-channels=no only-headers=no receive-errors=no streaming-enabled=
no streaming-max-rate=0 streaming-server=0.0.0.0

/interface wireless snooper
set channel-time=200ms multiple-channels=yes receive-errors=no

2

rodolfo -

/interface wireless nstreme
set wlan1 comment=RadioSlave disable-csma=no enable-nstreme=yes
enable-polling=yes framer-limit=3600 framer-policy=exact-size

There are a couple of things - in the above config you can check mark disable-csma so it equals ‘yes’. ( disable-csma=yes ). You can also change the framer-policy to ‘none’. ( framer-policy=none ). You’ll need to do this on both the AP and CPE where appropriate.

You see Nstreme waits until the ‘frame’ is full before transmitting it. It also follows your ‘rule’ of exact fit, so it won’t transmit until it can fill the frame exactly…

The disable csma - csma is the ‘standard’ polling protocol for 802.11, so by disabling that and having the Nstreme polling enabled - you have only one polling ‘protocol’ to deal with, saves time and also does not ‘care’ about csma devices.

The other thing you can do is setup a few queues, and set the priority for ICMP protocol (ping) to a higher priority than other protocols.

R/

3

It is not advisable to use Nstreme when you enable CSMA. Follow the instructions by Thom.

4

hmm.
right words