Clients have high ping values, above 600ms...

RouterOS Wireless Networking
1

We are using routerboard 532 with two MiniPci cards CM9 and sectorial antenas. Both are working on as ap bridge.

Status of interface 0:
status: running-ap
band: 2.4ghz-g
frequency: 2437MHz
noise-floor: -100dBm
overall-tx-ccq: 75%
registered-clients: 38
authenticated-clients: 38
current-ack-timeout: 345
current-distance: 345
nstreme: no
current-tx-powers: 1Mbps:23,2Mbps:23,5.5Mbps:23,11Mbps:23,6Mbps:23,9Mbps:23,12Mbps:23,18Mbps:23,24Mbps:23,36Mbps:23,48Mbps:23,54Mbps:23

Status of interface 1:
status: running-ap
band: 2.4ghz-g
frequency: 2437MHz
noise-floor: -100dBm
overall-tx-ccq: 75%
registered-clients: 38
authenticated-clients: 38
current-ack-timeout: 345
current-distance: 345
nstreme: no
current-tx-powers: 1Mbps:23,2Mbps:23,5.5Mbps:23,11Mbps:23,6Mbps:23,9Mbps:23,12Mbps:23,18Mbps:23,24Mbps:23,36Mbps:23,48Mbps:23,54Mbps:23


We have several problemns with loss packet and high ping time (above 600 ms). What can I do to solve that problemn ?

2

so you are serving 76 clients through 2 radios on the same freq?

if this is the case i think you need to set one radio on a different Freq.

what are you clinents signal strengths like?

3

and your using channel 6, which is the most common default wifi router channel, have you done a frequency check or a scan?

4

I have made a mistake … status from interface number 1 isL
status: running-ap
band: 2.4ghz-g
frequency: 2462MHz
noise-floor: -97dBm
overall-tx-ccq: 77%
registered-clients: 22
authenticated-clients: 22
current-ack-timeout: 266
current-distance: 266
nstreme: no
current-tx-powers: 1Mbps:23,2Mbps:23,5.5Mbps:23,11Mbps:23,6Mbps:23,9Mbps:23,12Mbps:23,18Mbps:23,24Mbps:23,
36Mbps:23,48Mbps:23,54Mbps:23
notify-external-fdb: no

5

My clients are using Ovislink radios

6

When I drop forward packets, ping results become to a normal time.

7

you hould not be forwarding packets on a hotspot style AP. This is broadcast traffic. Unless you want to have users see each other in the network neighborhood, you should not forward packets.

8

Thanks for your help, but I’m not forwarding packets.

9

how much bandwidth or packets / sec are going acrorss both interfaces?

10

Interface 0:
TX rate: 400 kbps
RX rate: 180 kbps
TX packet: 80
RX packet: 90


Interface 1:
TX rate: 550kbps
RX rate: 240 kbps
TX packet: 100
RX packet: 110

Thanks for your help, I’m really needing it.

11

Ricardo,

What is the

Is this your first MT AP with OL 5460AP clients? If so you should tweak the settings. Although we have never seen such delays in such set-up, here are a few things to try:

  • fix AP and clients on B only, and preferrably one rate (from your info 1, 2 or 5.5 Mbps should be sufficient),
  • the ACK timeout is way too high for PtMP (unless you do have clients over 40km away :wink:, put it on dynamic,
    -5460 and similar have lower RX sensitivity and you may want to try a higher power card to compensate, and on G it drops even more rapidly,
  • good antennas are a must.

BR,

Kristi

12

Thanks for your comments. How many clients can have in wich interface wireless or routerboard ? I would like to know exactly concurrent users. How can I do that ?

13

Ack timeout is on dynamic mode.

14

I have a similar problem. RB 532 and sr2. I got cliants at 1/4 mile great LOS doing the connect/dissconnect thing all day long. If I get a ping it’s over 1000ms. This has been happening for over a month and everyday I try to fix it. Yesterday I stumbled upon the fact that on all the “crap” links the ack timeout is 250-408. And these cliants are at 1/4 mile los. All my good link off of these same towers are at 30-50 for ack. My only option I could find was to put it on indoors but that did nothing to help. The clients are 3 models of demarctech radios and a Tranzeo. This is spread accross 9 towers and probably 15 RBs.

15

I have the problem of high ping from 4 months, and apparently it is due to interferences of adiacent channels.
But until now I’m not sure and I have not found a solution.

16

I have have the same problem. I have close every client, if bandwith is up of 500Kbit ping is to big. ACK is dynamic - and have 408 - it is very big. If I write ack it not help. Ping is good only if bandwith is smaller of 500kbit. It is tarrible

17

How many clients by wireless card do you have ?

18

I ended up switching the sr2 to a cm9 and all the ack came down to 30 or so and the latency is gone.

19

priority for icmp rule to other, can help you when high traffic

regrads
Hasbullah.com

20

Is there some one that has encountered the problem changing the MAC address of the Wireless interface? I mean you have wireless interface as AP with original MAC address. If I change this MAC address the ack parameter disappear from winbox and all clients have slow connectivity.

ciao