IBM PowerPRS Q-64G
Preliminary
Packet Routing Switch
Table 3-16. Egress Idle Packet, Bytes H1 and H2 on the Low Channel in the 512-Gbps Configuration
(This table also applies to egress data packets, control packets, and service packets.)
Information Carried
Byte
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
H1
Output
Output
Output
Output
Output
Output
Output
Output
(low channel) for
extended output queue
grant flywheel = 0
queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant:
port 0
port 1
port 2
port 3
port 4
port 5
port 6
port 7
H2
Output
Output
Output
Output
Output
Output
Output
Output
(low channel) for
extended output queue
grant flywheel = 0
queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant:
port 8
port 9
port 10
port 11
port 12
port 13
port 14
port 15
H1
Output
Output
Output
Output
Output
Output
Output
Output
(low channel) for
extended output queue
grant flywheel = 1
queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant:
port 16
port 17
port 18
port 19
port 20
port 21
port 22
port 23
H2
Output
Output
Output
Output
Output
Output
Output
Output
(low channel) for
extended output queue
grant flywheel = 1
queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant:
port 24 port 25 port 26 port 27 port 28 port 29 port 30 port 31
Table 3-17. Egress Idle Packet, SCC Byte
Information Carried
Byte
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
SCC
SCC data: SCC data:
SCC data:
bit 2
SCC data:
bit 3
SCC data:
bit 0
SCC data: SCC data:
SCC data:
bit 3
(high or low channel)
bit 0 bit 1
bit 1 bit 2
Table 3-18. Egress Idle Packet, FC Byte
Information Carried
Byte
Bit 0
Bit 1
Reserved
Bits 2:4
Bits 5:7
FC
Subport grant type/
priority flywheel status
Subport grant port
flywheel status
Memory grant
(high or low channel)
prsq-64g.01.fm
December 20, 2001
Functional Description
Page 43 of 199
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