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Hovo666
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Topic Author
Posts: 5
Joined: Wed Oct 31, 2007 10:12 pm

WDS ping problem

Wed Dec 12, 2007 12:49 pm

Hi all
I want to make a wds network but I have some problems.

[admin@MikroTik] interface wireless> print
Flags: X - disabled, R - running
0 R name="wlan1" mtu=1500 mac-address=00:0C:42:0C:A2:F1 arp=enabled disable-running-check=no interface-type=Atheros AR5413 radio-name="000C420CA2F1"
mode=ap-bridge ssid="MikroTik" area="" frequency-mode=manual-txpower country=no_country_set antenna-gain=0 frequency=2412 band=2.4ghz-b/g
scan-list=default rate-set=default supported-rates-b=1Mbps,2Mbps,5.5Mbps,11Mbps
supported-rates-a/g=6Mbps,9Mbps,12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps basic-rates-b=1Mbps basic-rates-a/g=6Mbps max-station-count=2007
ack-timeout=dynamic tx-power-mode=default noise-floor-threshold=default periodic-calibration=default periodic-calibration-interval=60
burst-time=disabled dfs-mode=none antenna-mode=ant-a wds-mode=dynamic wds-default-bridge=bridge1 wds-default-cost=100 wds-cost-range=50-150
wds-ignore-ssid=no update-stats-interval=disabled default-authentication=yes default-forwarding=yes default-ap-tx-limit=0 default-client-tx-limit=0
proprietary-extensions=post-2.9.25 hide-ssid=no security-profile=default disconnect-timeout=3s on-fail-retry-time=100ms hw-retries=15
preamble-mode=both compression=no allow-sharedkey=no

[admin@MikroTik] interface bridge port> print
Flags: X - disabled, I - inactive, D - dynamic
# INTERFACE BRIDGE PRIORITY PATH-COST
0 ether1 bridge1 128 10
1 wlan1 bridge1 128 10
2 D wds1 bridge1 128 100
3 D wds2 bridge1 128 100

for testing I take 3 RB-532A
I have 3 AP bidge with dinamic WDS (wds-default-bridge=bridge1)
I have the same config on all RBs,
and a 1 client as a station (RB-532A)

I have the same network on all RBs and on client - 192.168.66.0/24

but for example when I trying to ping from one to another I get too big pings 5xx ms or high with too many timeouts

I put all these in one room so I have no link problem.
what mistakes I did or I need another config.

can anybody help me with these.

Thanks for any help.
 
arffer
just joined
Posts: 21
Joined: Tue Mar 29, 2005 3:14 am

Re: WDS ping problem

Tue May 27, 2008 11:41 pm

For anyone stumbling upon this thread that had no resolution posted... I just finished struggling with the same problem.

Router A has an ethernet connection to the Internet, and a wireless in AP Bridge mode with WDS enabled. This router serves both clients and also another AP.

Router B has only a wireless connection, set in AP Bridge mode also with WDS enabled. This router gets its backhaul from Router A above via WDS, and then serves clients.

As long as no clients are connected to Router B, the WDS connection is established. But pings between Router A and Router B have a very wide variance (32ms - 1200ms) constantly changing.

On occasion all packets will be dropped, perhaps for as long as five minutes

But the instant a client connects to Router B, all pings between the two routers are lost, and the clients on Router B can not surf. Occasionally, pings will start up again for 1-2 minutes, and during that time clients on Router B can access the Internet.

Okay, that's the symptoms. Now the resolution. The problem was that I had both radios set on 2.4ghz-b/g, and depending upon environmentals, ESPECIALLY a G clinet connecting, the radios were constantly changing mode, seeking the best connection, and when they did so they dropped the WDS connection.

Changing both radios to "B" only fixed the entire problem. The pings between the two routers is now a constant 1ms-4ms, with no drops regardless of who is connected.

The downside of course is that now I can only offer 802.11b from both APs to my clients. But that's not a big deal.

I hope this might help someone in the future!