IEEE Std 802.1Qci-2017 pdf free download – IEEE Standard for Local and metropolitan area networks— Bridges and Bridged Networks— Amendment 28: Per-Stream Filtering and Policing.
8.6.5.1.1 Stream filter instance table
The stream filter instance table consists of an ordered list of stream filters that determine the filtering and policing actions that are to be applied to frames received on a specific stream. Each stream filter contains the following elements:
a) A stream filter instance identifier. This is an integer value that uniquely identifies the filter instance,and acts as an index to the table. The ordering of the identifier values defines the ordering of the list of stream filters; smaller identifier values appear earlier in the ordered list.
b) A stream_handle specification. This can be either of the following:
1) A single stream_handle value, as specified in IEEE Std 802.1CB.
2) A wild-card value that matches any stream_handle value.
c) A priority specification. This can be either of the following:
1) A single priority value.
2) A wild-card value that matches any priority value.
d) A stream gate instance identifier. Identifies the stream gate instance (8.6.5.1.2) that is used by the
stream filter. A stream gate can be in one of two states:
1) Open: Frames pass through the gate.
2) Closed: Frames do not pass through the gate.
e) Zero or more filter specifications. The actions specified in a filter specification can result in a frame
passing or failing the specified filter. Frames that fail a filter are discarded. The filter specification
can include other actions, such as setting the drop_eligible parameter to TRUE. The following filter
specifications are currently defined:
1) Maximum SDU size. Frames that exceed this SDU size do not pass the stream filter; frames that do not exceed this SDU size can pass the stream filter if all other filter conditions are met.
NOTE 1—The Maximum SDU size is defined per stream and can therefore differ from the queueMaxSDU specified in 8.6.8.4 of IEEE Std 802.1Qbv. As queueMaxSDU is applied after the stream filters, it is possible that a frame that passes the Maximum SDU size stream filter will later be discarded because its SDU size exceeds queueMaxSDU.
2) Flow meter instance identifier. The identifier of an instance of a flow metering function as specified in 8.6.5. The flow meter instance is an index into a flow meter instance table
(8.6.5.1.3) that specifies the operating parameters for each flow meter instance. Flow metering is always applied after any other filter specifications that could result in frame discard.
f) Frame counters
1) A count of frames matching both the stream_handle and priority specifications.
2) A count of frames that passed the stream gate.
3) A count of frames that did not pass the stream gate.
4) A count of frames that passed the Maximum SDU size filter.
5) A count of frames that did not pass the Maximum SDU size filter.
6) A count of frames that were discarded as a result of the operation of the flow meter.
g) A StreamBlockedDueToOversizeFrameEnable parameter, which takes the value TRUE or FALSE. A value of TRUE indicates that the StreamBlockedDueToOversizeFrame function is enabled; a value of FALSE indicates that the StreamBlockedDueToOversizeFrame function is disabled. The default value of StreamBlockedDueToOversizeFrameEnable is FALSE.
h) A StreamBlockedDueToOversizeFrame parameter, which takes the value TRUE or FALSE. If StreamBlockedDueToOversizeFrameEnable is TRUE, a value of TRUE in StreamBlockedDueToOversizeFrame indicates that all frames are to be dropped (i.e., the stream filter behaves as it would if the maximum SDU size were to be set to 0 octets). If StreamBlockedDueToOversizeFrame is FALSE, it has no effect. The default value of StreamBlockedDueToOversizeFrame is FALSE; if any frame is discarded because it exceeds the Maximum SDU size for the stream, then StreamBlockedDueToOversizeFrame is set TRUE.IEEE Std 802.1Qci pdf download.