The GS2000 line card 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. |