Q: Is there any settings I need to configure to get higher throughput?
A: Apply channel bonding (40MHz), enable packet aggregation, and short guard interval. These will take effect if the wireless client support IEEE802.11n draft 2 features. The wireless client should have the same option to be enabled to get high throughput.
Q: Which spectrum band does TZ210W support?
A: TZ210W supports 2.4 GHz only.
Q: Which spectrum band does SonicPointN support?
A: SonicPointN supports either 2.4 GHz or 5 GHz band.
Q: Does TZ210W provide bridge mode in the current release?
A: No. TZ210W supports Access Point radio mode in the initial release. Future release will provide Bridge mode.
Q: Which encryption algorithm can provide better throughput?
A: RC4 based encryption algorithm including WEP and TKIP will degrade the throughput. WPA2 AES is highly recommended for secure wireless connection.
Q: Why is the data throughput not good while wireless client’s signal strength is excellent?
A: Throughput is possible not at the best level when there are many wireless devices contending for the radio environment. You can use TZ210W “Wireless > IDS” or third party tools to determine whether there are too much interference nearby.
Q: How to do a site survey?
A: Besides TZ210W “Wireless > IDS”, other wireless sniffers that can do site survey include NetStumber, AiroPeek, etc.
Q: What information should I provide in order to get efficient support?
A: Your detailed symptom report about the problem will be very helpful for us to solve it efficiently. Generally we expect to see TSR report and Preference file downloaded from your TZ210W. Packet capture using site survey tools will be greatly useful. And the wireless client hardware model, OS version, managing utility as well as driver version are all required for connectivity issue.
Q: How to make my legacy 802.11g/b clients work with TZ210W?
A: TZ210W supports five radio modes: 802.11g/b Mixed, 802.11g Only, 802.11b Only, 802.11n/g/b Mixed, and 802.11n Only. If you only have legacy 802.11g/b clients, you can select 802.11g/b Mixed, 802.11n/g/b Mixed, 802.11g Only, or 802.11b Only. When 802.11n/g/b Mixed is selected, Radio Band must be Auto or Standard 20 MHz. Wide 40MHz will not work for 802.11g/b clients.
Q: Can Short Guard Interval feature also work on 20MHz?
A: No, SGI can only work on 40MHz channel width.
Q: Can Inter-wireless clients traffic achieve comparable high throughput as wireless-wired traffic?
A: No, given the nature of half duplex mode of wireless RF radio, inter-wireless clients traffic has lower throughput than wireless-wired traffic.
Q: I have an Intel 4965AGN NIC, but I’m only able to connect at 130Mbps. Why?
A: The IEEE802.11n maximum throughput (300Mbps) requires all 802.11n draft 2 features to be supported by both Access Point and wireless client. The most important features include 40Mbps channel bonding, packet aggregation, and short guard interval. SonicWall TZ210W supports all of the above features in 2.4GHz band and is completely compatible with IEEE standard.
Intel 4965AGN does not support 40MHZ channels in 2.4GHz spectrum, which means the maximum throughput for 4965AGN can not be greater than 150Mbps.
Q: My laptop connectivity seems up and down. Why?
A: Usually if you have both Windows WZC and Vendor’s specific managing utility working at the same time, both of them will try to control the wireless connection and conflict with each other. This will cause your connectivity up and down. You need to shutdown one of them to maintain the stability of wireless client.
And you also need to check the power saving option on your wireless client, which will disassociate wireless client based on power consumption status on the laptop.
Noise and interference will also affect the connectivity. The mobile device such as hand held phone and microwave can all operate on 2.4GHz spectrum band, which can overwhelm the normal 802.11 wireless LAN traffic and cause connection loss. The nearby access point which is operating in the overlapped channel will generate interference and impact the connectivity as well as performance.
Q: My wireless client can ping WLAN interface, but has trouble to access internet. Is this a wireless issue?
A: Most likely not a wireless issue if your wireless client can ping WLAN interface IP address (172.16.31.1). You may check your WAN setting, firewall rule and other customized configuration. System log will provide details if your packet gets dropped by TZ210W.
Q: My wireless client can only support WPA, can TZ210W be set up as WPA2?
A: WPA2 and WPA have different security criteria. If your wireless client can only support WPA, then TZ210W has to be configured as WPA or WPA2-AUTO.
Q: Why does my RaLink 802.11n card can not get good throughput?
A: The RaLink 802.11n client driver setting has not been optimized to support 802.11n high throughput. Please make sure to review the driver properties to enable high throughput specific features, such as 40MHz channel width, frame aggregation and short guard interval.
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