Cpe210 Lag spikes
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Cpe210 Lag spikes
Model :
Hardware Version :
Firmware Version :
ISP :
[/SIZE][SIZE=2]Hi,
[SIZE=2]
I have a cpe210, Latest firmware (tried all the firmwares) set up as a client on a long stretch of ethernet cable to get internet over to an annex.
Connecting to a sky q hub.
But it has a strange issue where if I select 802.11n or 802.11b/g/n it has lag spikes of 3ms ever 2-3 seconds.
as soon as i drop it down to any thing lower it works perfectly. I have tried two cpe210's and they both have the same issue.
I have tried changing the transmit power with no change.
I have not yet tested using both either side and seeing if it is their problem or the routers problem.
I was just wondering if there was anything else I may be missing?
I'm thinking its an issue with the router as I read this back to be fair.
Many thanks.[/SIZE]
Hardware Version :
Firmware Version :
ISP :
[/SIZE][SIZE=2]Hi,
[SIZE=2]
I have a cpe210, Latest firmware (tried all the firmwares) set up as a client on a long stretch of ethernet cable to get internet over to an annex.
Connecting to a sky q hub.
But it has a strange issue where if I select 802.11n or 802.11b/g/n it has lag spikes of 3ms ever 2-3 seconds.
as soon as i drop it down to any thing lower it works perfectly. I have tried two cpe210's and they both have the same issue.
I have tried changing the transmit power with no change.
I have not yet tested using both either side and seeing if it is their problem or the routers problem.
I was just wondering if there was anything else I may be missing?
I'm thinking its an issue with the router as I read this back to be fair.
Many thanks.[/SIZE]
Re:Cpe210 Lag spikes
Pinging the router over a radio link gives latency for all devices in between, not only CPEs, but also your PC's and the router's network layers. Latency depends on many factors such as load of the systems, uplink speed, saturation of the link etc. and in case of WiFi links most important: the AirTIme your devices can get.
For example, this is usual latency of a VPN tunnel from an edge router over a WiFi link using CPE510 through a gateway router to a VPN endpoint over a 500 Mbps Internet uplink. Those measurements were made on a heavily loaded link. WiFi speed is full 300 Mbps in 802.11n-only mode:
What's more, the 300 Mbps on this link is wireless speed, not data speed. Data speed is about 70% of wireless speed in 802.11n mode, thus yielding 210 Mbps over the wireless link, which is half-duplex. Therefore, if using full-duplex communication you have to cut this in half to get real data throughput (105 Mbps in both directions). That's BTW the reason why CPEs have a 100 Mbps Ethernet interface only, despite the fact that they can achieve 300 Mbps on the radio link.
In 802.11b/g mode the 54 Mbps is also max. wireless speed. But in b/g mode, data speed is only about 50% of wireless speed due to the modulation scheme used in this mode. Therefore, maximum throughput over b/g will be around 22 to 24 Mbps data speed at maximum in practice, not 30 Mbps.
So you should use n-only mode to reach 30 Mbps data speed, which would need ~ 45 to 54 Mbps wireless speed. b/g is limited to max. 54 Mbps wireless speed and gives you 24 Mbps data speed at maximum.
Now for the AirTIme: if your area is overcrowded with 2.4 GHz APs, don't expect to reach this figures using CPE210, since limited AirTime (the amount of time your CPE210 can allocate the radio channel for sending data) will considerably reduce the overall throughput and therefore increase the latency. This is not so problematic on short distances, but increases with larger distances (above measurements have been made over a distance of 600 meters, but in 5 GHz band).
For example, this is usual latency of a VPN tunnel from an edge router over a WiFi link using CPE510 through a gateway router to a VPN endpoint over a 500 Mbps Internet uplink. Those measurements were made on a heavily loaded link. WiFi speed is full 300 Mbps in 802.11n-only mode:
What's more, the 300 Mbps on this link is wireless speed, not data speed. Data speed is about 70% of wireless speed in 802.11n mode, thus yielding 210 Mbps over the wireless link, which is half-duplex. Therefore, if using full-duplex communication you have to cut this in half to get real data throughput (105 Mbps in both directions). That's BTW the reason why CPEs have a 100 Mbps Ethernet interface only, despite the fact that they can achieve 300 Mbps on the radio link.
In 802.11b/g mode the 54 Mbps is also max. wireless speed. But in b/g mode, data speed is only about 50% of wireless speed due to the modulation scheme used in this mode. Therefore, maximum throughput over b/g will be around 22 to 24 Mbps data speed at maximum in practice, not 30 Mbps.
So you should use n-only mode to reach 30 Mbps data speed, which would need ~ 45 to 54 Mbps wireless speed. b/g is limited to max. 54 Mbps wireless speed and gives you 24 Mbps data speed at maximum.
Now for the AirTIme: if your area is overcrowded with 2.4 GHz APs, don't expect to reach this figures using CPE210, since limited AirTime (the amount of time your CPE210 can allocate the radio channel for sending data) will considerably reduce the overall throughput and therefore increase the latency. This is not so problematic on short distances, but increases with larger distances (above measurements have been made over a distance of 600 meters, but in 5 GHz band).
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Re:Cpe210 Lag spikes
Got the same problem. Two CPE210 1.1 (one is AP and one is Client) are connected (distance is 20meter). Cableline is at AP with 400Mbit/s. Airconnection shows 300Mbit/s. Making internet speedtests at the client, gives me always max. 65Mbit/s in downstream.
The bigger problem is the "lag or ping spikes". That drop you from online games time to time or result in extreme lags during the game.
Ping to google.com (you can see two spikes):
Client Settings:
AP Settings:
The bigger problem is the "lag or ping spikes". That drop you from online games time to time or result in extreme lags during the game.
Ping to google.com (you can see two spikes):
Client Settings:
AP Settings: