Configuring the IFG
Context
An interframe gap (IFG) is used to separate two data packets, as shown in Figure 2-6. You can configure the IFG to change the packet forwarding rate on an interface, thereby adjusting the data forwarding capacity of the interface.
The packet forwarding rate, also called throughput, refers to the data forwarding capability on an interface and is measured in packet per second (pps). The packet forwarding rate is calculated based on the number of 64-byte data packets transmitted in a period. The lengths of preamble and IFG affect the packet forwarding rate.
The default IFG is the maximum value of 12 bytes and is recommended. If you set the IFG to a small value, the device will not have enough time to receive the next frame after receiving one data frame. The packets then cannot be processed in real time, which results in packet loss.
On the S7700, only the ES1D2L02QFC0 interface card supports the IFG configuration.
