Brocade Multi-Service IronWare QoS and Traffic Management Configuration Guide (Supporting R05.6.00) - Manual (Page 97)

Multi-Service IronWare QoS and Traffic Management Configuration Guide 83
53-1003037-02
Protocol Packet Prioritization
4
Table 25 lists the default EXP Decode mappings
Protocol Packet Prioritization
Certain control packets are handled with certain priorities by default and hence those priorities
cannot be lowered with any of the QoS configuration commands or the priority force command. The
list of these control packets are listed below.
Table 26 on page 84 lists the protocol packets that are internally and automatically prioritized for
IPv4, L2, and IPv6.
1 (001) 1 (01) 1 5 (101) 1 (01) 5
1 (001) 2 (10) 1 5 (101) 2 (10) 5
1 (001) 3 (11) 1 5 (101) 3 (11) 5
2 (010) 0 (00) 2 6 (110) 0 (00) 6
2 (010) 1 (01) 2 6 (110) 1 (01) 6
2 (010) 2 (10) 2 6 (110) 2 (10) 6
2 (010) 3 (11) 2 6 (110) 3 (11) 6
3 (011) 0 (00) 3 7 (111) 0 (00) 7
3 (011) 1 (01) 3 7 (111) 1 (01) 7
3 (011) 2 (10) 3 7 (111) 2 (10) 7
3 (011) 3 (11) 3 7 (111) 3 (11) 7
TABLE 24 Default EXP encode table
Priority
decimal (binary) Drop-precedence
decimal (binary) EXP value Priority
decimal (binary) Drop-precedence
decimal (binary) EXP value
TABLE 25 Default EXP decode table
EXP value Priority
decimal (binary) Drop-precedence decimal
(binary)
7 7 (111) 0
6 6 (110) 0
5 5 (101) 0
4 4 (100) 0
3 3 (011) 0
2 2 (010) 0
1 2 (001) 0
0 0 (000) 0