CradlePoint CBR400/CBR450/MBR1200/MBR1400 Load Balancing Information |
| Tuesday, 02 February 2010 | |
CradlePoint CBR400/CBR450/MBR1200/MBR1400 Load Balancing Information(MBR1400 Load Balancing 3 USB Modems & WiFi as WAN connection) CradlePoint offers Load Balancing across multiple cellular connections on the CBR400, CBR450, MBR1200 and MBR1400 3G/4G routers. What is load balancing? Load balancing allows you to use multiple cellular modems in one router and balance the bandwidth burden carried by any one of them. This is a great solution for people doing heavy downloading (you can use two [or more!] modems and let them share the work, reducing your risk of exceeding your 5GB/10GB limit) or folks wanting to use multiple modems from different carriers to maximize your chances of having the best possible performance (for example, one Sprint modem and one Verizon modem). How Load Balancing Works: In the connection manager you'll see multiple entries for the wireless modems (refer to picture at the top of the page). This indicates the following options: Load Balance Check - If you have an available connection you'd like to Load Balance, simply place a check mark by the connection. Enabled - Placing a check mark in this field enables the corresponding connection Up/Down Arrows - This indicates connection preference if not used in a Load Balance configuration. In a Load Balance configuration the order indicates which device you want higher on the priority list. Load Balancing uses available bandwidth to determine which WAN device to send a connection over. When the first connection is requested, the router will look at the available connections and compare available speeds. In this example we will say the router sees the Ethernet (Cable/DSL) connection that has 1200 kbps of bandwidth available, and the modem connection has 800 kbps available. So, the first user that connects will be sent over Ethernet because there is more bandwidth available. Now, suppose this first connection only uses 200 kbps, which still gives the Ethernet WAN connection 1000 kbps available of usable bandwidth. When the next user gets online, the router cross references the available speeds on both connections and would again utilize the Ethernet based connection. This is because (1200Kbps - 200Kbps = 1000Kbps) and the Ethernet connections bandwidth is still greater than the wireless modem. This will continue until the available bandwidth of the Ethernet connection is less than the total speed available on the secondary modem. From our example when the Ethernet connection falls below 800Kbps the next connection would be prioritized to the USB modems connection. As you introduce more modems into the load balancing configuration this same formula occurs ensuring you have the maximum amount of bandwidth available per connection for any given user. The CBR400, CBR450, MBR1200 and MBR1400 routers all support load balancing. The CBR400/CBR450 can load balance between one USB modem and one ExpressCard, the MBR1200 can load balance between up to five modems (3 USB, one ExpressCard, one PCMCIA) and the MBR1400 can balance up to five modems (3 USB and 2 ExpressCard). The new Cradlepoint NetBSD platform makes it easier than ever for you to load balance all of your active internet connections. Related Links
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