IBM PowerPRS Q-64G
Preliminary
Packet Routing Switch
Table 3-12. Egress Idle Packet, Byte H1 on the High 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
(high channel) for
grant type (byte H0) = 0
Subport
output
Subport
output
Subport
output
Subport
output
Subport
output
Subport
output
Subport
output
Subport
output
queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant:
Subport grant type/
priority flywheel
(FC byte) = 0 to 3
(grant priority)
port n,
port n,
subport 1
port n,
subport 2
port n,
subport 3
port n + 1,
subport 0
port n + 1,
subport 1
port n + 1,
subport 2
port n + 1,
subport 3
subport 0
H1
(high channel) for
grant type (byte H0) = 0
Subport
multicast
Subport
multicast
Subport
multicast
Subport
multicast
Subport
multicast
Subport
multicast
Subport
multicast
Subport
multicast
grant: ports grant: ports grant: ports grant: ports grant: ports grant: ports grant: ports grant: ports
Subport grant type/
priority flywheel
(FC byte) = 4
0 to 7,
0 to 7,
priority 1
0 to 7,
priority 2
0 to 7,
priority 3
8 to 15,
priority 0
8 to 15,
priority 1
8 to 15,
priority 2
8 to 15,
priority 3
priority 0
(subport multicast)
Multicast
Multicast
Multicast
Multicast
Multicast
grant: low
subswitch
element,
priority 0
Multicast
grant: low
subswitch
element,
priority 1
Multicast
grant: low
subswitch
element,
priority 2
Multicast
grant: low
subswitch
element,
priority 3
H1
grant: high grant: high grant: high grant: high
(high channel) for
grant type (byte H0) = 1
subswitch
element,
priority 0
subswitch
element,
priority 1
subswitch
element,
priority 2
subswitch
element,
priority 3
Note: n = subport grant port flywheel (FC byte) = 0 to 7
Table 3-13. Egress Idle Packet, Byte H1 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
H1
(high channel) for
grant type (byte H0) = 0
Subport
output
Subport
output
Subport
output
Subport
output
Subport
output
Subport
output
Subport
output
Subport
output
queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant: queuegrant:
Subport grant type/
priority flywheel
(FC byte) = 0 to 3
(grant priority)
port n,
port n,
subport 1
port n,
subport 2
port n,
subport 3
port n + 1,
subport 0
port n + 1,
subport 1
port n + 1,
subport 2
port n + 1,
subport 3
subport 0
H1
(high channel) for
grant type (byte H0) = 0
Subport
multicast
Subport
multicast
Subport
multicast
Subport
multicast
Subport
multicast
Subport
multicast
Subport
multicast
Subport
multicast
grant: ports grant: ports grant: ports grant: ports grant: ports grant: ports grant: ports grant: ports
Subport grant type/
priority flywheel
(FC byte) = 4
0 to 15,
0 to 15,
priority 1
0 to 15,
priority 2
0 to 15,
priority 3
16 to 31,
priority 0
16 to 31,
priority 1
16 to 31,
priority 2
16 to 31,
priority 3
priority 0
(subport multicast)
Multicast
Multicast
Multicast
Multicast
Multicast
grant: low
subswitch
element,
priority 0
Multicast
grant: low
subswitch
element,
priority 1
Multicast
grant: low
subswitch
element,
priority 2
Multicast
grant: low
subswitch
element,
priority 3
H1
grant: high grant: high grant: high grant: high
(high channel) for
grant type (byte H0) = 1
subswitch
element,
priority 0
subswitch
element,
priority 1
subswitch
element,
priority 2
subswitch
element,
priority 3
Note: n = subport grant port flywheel (FC byte) = 0 to 7
prsq-64g.01.fm
December 20, 2001
Functional Description
Page 41 of 199
IBM [ IBM ]
