Ring Purger

The VNswitch FDDI interface is able to detect and remove frame fragments and No Owner Frames (NOFs) from the ring through a function referred to as the ring purger.

It is generally recommended that you leave the ring purger on (enabled). The purger uses available bandwidth on the ring to ensure that fragments and No-Owner Frames are removed. Only a very small percentage of available bandwidth may be lost with the purger running if the ring is operating at very high traffic levels. However, when the purger is running, the frame counter observed on any MAC on the ring shows a much larger count than what may be expected. The high number may be the result of including void frames in the total. The value may not, therefore, necessarily reflect a loss of bandwidth. If these larger frame counts interfere with measurements you wish to make, then the ring purger can be disabled.

Note:  To completely disable the ring purger on the network, all nodes capable of being the ring purger must be disabled.