Link-layer overhead can cause packet drops on constituent links because of bit stuffing on serial links. Bit stuffing is used to prevent data from being interpreted as control information.
By default, 4 percent of the total bundle bandwidth is set aside for link-layer overhead. In most network environments, the average link-layer overhead is 1.6 percent. Therefore, we recommend 4 percent as a safeguard. For more information, see RFC 4814, Hash and Stuffing: Overlooked Factors in Network Device Benchmarking.
For link services IQ (lsq-) interfaces, you can configure the percentage of bundle bandwidth to be set aside for link-layer overhead. To do this, include the link-layer-overhead statement:
- link-layer-overhead percent;
You can include this statement at the following hierarchy levels:
You can configure the value to be from 0 percent through 50 percent.