Brocade Communications Systems 53-1002163-02 manual Pgid

11 CEE map configuration

CEE Priority Group Table defines each Priority Group ID (PGID) and its scheduling policy (Strict Priority versus DWRR, DWRR weight, relative priority), and partially defines the congestion control (PFC) configuration. There are 16 rows in the CEE Priority Group Table. Table 29 presents the default CEE Priority Group Table configuration.

NOTE

Only a single CoS can be mapped to a PFC-enabled priority queue. The CoS number must be identical to the priority queue number. If your configuration violates this restriction an error message displays and the Priority Group Table is set back to the default values.

When the CEE map is applied, and the interface is connected to the CNA, only one strict priority PGID (PGID 15.0 to PGID 15.7) is allowed.

TABLE 29	Default CEE Priority Group Table configuration
PGID	Bandwidth%	PFC
15.0	—	N
15.1	—	N
15.2	—	N
15.3	—	N
15.4	—	N
15.5	—	N
15.6	—	N
15.7	—	N
0	0	N
1	0	N
2	0	N
3	0	N
4	0	N
5	0	N
6	0	N
7	0	N

Strict Priority versus DWRR is derived directly from the PGID value. All PGIDs with prefix 15 receive Strict Priority scheduling policy and all PGIDs in the range 0 through 7 receive DWRR scheduling policy. Relative priority between Priority Group is exactly the ordering of entries listed in the table, with PGID 15.0 being highest priority and PGID 0 being lowest priority. Congestion control configuration is partially specified by toggling the PFC column On or Off. This provides only partial configuration of congestion control because the set of priorities mapped to the Priority Group is not known, which leads into the CEE Priority Table.

120	Converged Enhanced Ethernet Administrator’s Guide
	53-1002163-02