The giant fault counter may be incremented for inbound packets which are not in error and which are transmitted normally. This happens on the main high end Cisco switches, e.g. the 6500 family. Examples of when this error occurs include:
- 802.1Q tagged packets on trunks (and other tagged ports e.g. certain uplinks and high-end server ports) that exceed the normal maximum transmission unit.
- 10 gigabit ports.
- certain storage area network technologies.
Currently, Cisco does not have a solution to correct this problem. In Entuity, you can configure prodigy so that it excludes giant packets from error calculations, i.e. events.excludeGiants in entuity.cfg. Excluding giant packets impacts the following: