It’s important to note that bandwidth and Jumbo Frames are two separate items. Generally, Jumbo Frames are defined as any packet size greater than 1500 bytes. The standard packet size exists below 1500 bytes and is defined by the IEEE 802.3 standard, which ranges from 64 bytes to 1518 bytes. Sizes greater than 1500 bytes are referred to as Jumbo Frames.
There are two important factors in regard to network equipment performance and the standard for packet size.
First, the network equipment is generally tested at only 64 bytes which is the smallest size in the range.
Second, many network cameras with megapixel sizes greater than 2MP will have a packet size more than the upper standard limit of 1518 bytes. As IEEE 802.3 defines packet size range, no standards for processing or transmitting packet sizes greater than 1518 bytes exist. As part of the IEEE 802.3 application to network products when operating at network speeds of 100Mbps, the ability to accept and process packet sizes of more than 1518 bytes is not possible with many network switches, extenders, and other infrastructure components.
In many cases, network products operating at speeds of 1000Mbps will be able to process Jumbo Frames. The problem is differences that exist between a camera with a 100Mbps bandwidth port, and a switch set to receive at 1000Mbps. Setting the network switch’s bandwidth at 1000Mbps when receiving 100Mbps from a camera is not the answer. This can result in incompatibility issues between the two devices, resulting in information loss and even a possible connection loss. Even if the switch is set to auto bandwidth, sensing mismatches can result in auto flip between half and full-duplex, resulting in different problems.
Key Points of Jumbo Frames
Switches that cannot support Jumbo Frames will drop Jumbo frames
For Jumbo Frames to be transmitted without changes, every component end-to-end in the transmission path must support the transmitted Jumbo frame size.
Also, keep in mind, this also applies to the processing equipment. The best solution for processing Jumbo Frames is the ability to maintain the same transmission speed at both ends of the cable. This has led to the common idea that transmission of Jumbo frames requires Gigabit network speeds. This is not the case. It is the limitation of the equipment that determines whether or not Jumbo Frames can be handled at lower than Gigabit speeds, which are typically 100Mbps, and the reason why bandwidth and Jumbo Frame capacity should be considered separately.
Key Features of Jumbo Frames
Solutions to Jumbo Frame Handling – Vigitron offers advanced network switches that are managed, unmanaged, and hardened that provide solutions when Jumbo Frames must be accounted for.
What makes Vigitron network switches unique? For managed switches – At 100Mbps, ports can be programmed to process Jumbo Frames up to 9600 bytes.
Vigitron’s lineup of switches is unique in its ability to process Jumbo Frames at 100Mbps network speeds. Even if your application does require 1000Mbps (1G) bandwidth you should consider using our Jumbo Frame @ 100Mbps switches to assure quality transmission and maximum picture quality. Vigitron provides free and without obligation Design Center Services to bill of materials for the most cost-effective and reliable infrastructure designs. Request design center services by filling out the form on our website at www.vigitron.com or emailing us at firstname.lastname@example.org.
Vigitron Inc. Phone: (858) 484-5209
Southeast Security Products (Manufacture Representatives of Vigitron) www.sesproducts.com
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