IBM PowerPRS Q-64G
Packet Routing Switch
Preliminary
Table 3-14. Egress Idle Packet, Byte H2 on the High 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
H2
Subport
output
Subport
output
Subport
output
Subport
output
Subport
output
Subport
output
Subport
output
Subport
output
(high channel) for
subport grant type/
priority flywheel
(FC byte) = 0 to 3
(grant priority)
queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant:
port n + 2,
subport 0
port n + 2,
subport 1
port n + 2,
subport 2
port n + 2,
subport 3
port n + 3,
subport 0
port n + 3,
subport 1
port n + 3,
subport 2
port n + 3,
subport 3
H2
(high channel) for
subport grant type/
priority flywheel
(FC byte) = 4
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
(subport multicast)
Note: n = subport grant port flywheel (FC byte) = 0 to 7
Table 3-15. Egress Idle Packet, Byte H1 on the Low Channel in the 256-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
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 8
port 9
port 10
port 11
port 12
port 13
port 14
port 15
Functional Description
Page 42 of 199
prsq-64g.01.fm
December 20, 2001
IBM [ IBM ]
