IBM3229P2035
IBM Packet Routing Switch Serial Interface Converter
Advance
3.3.3 Ingress Packets for IBFC
Figure 12: Example of Converter Ingress Idle Packet
Byte
Byte 0
Byte 1
Byte 2
Byte 3
Bit
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
0
0
0
0
0
8
0
0
0
0
0
7
1
1
1
1
1
6
1
1
1
1
1
5
0
0
0
0
0
4
0
0
0
0
0
3
1
1
1
1
1
2
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
Word 0
Word 1
Word 2
Packet Qualifier
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
Word 15
Table 4: Packet Qualifier for Ingress Idle Packet
Idle Packet
Bit Meaning
Bit 31
Bit 30
Bit 29
0
Bit 28
0
Bit 27
Bit 26
Bit 25
0
Bit 24
0
TxPause Bit TxPause Bit
TxPause Bit TxPause Bit
0
1
2
3
TxPause Priority
Bitmap
Highest
Medium High
Medium Low
Low
1
0
0
0
1
0
0
1
0
0
1
0
0
0
1
0
1
0
0
0
0
1
1
0
All
None
Table 5: Packet Qualifier for Ingress Data Packet
Data Packet
Bit Meaning
Bit 31
Bit 30
Bit 29
Bit 28
Bit 27
Bit 26
Bit 25
Bit 24
TxPause Bit TxPause Bit
Active Bit
Backup Bit TxPause Bit TxPause Bit
Packet Priority Bits
0
1
‘1’
‘1’
2
3
TxPause Priority
Bitmap
Highest
Medium High
Medium Low
Low
1
0
0
0
1
0
0
1
0
0
1
0
0
0
1
0
1
0
0
0
0
1
1
0
All
None
Functional Description
Page 30 of 154
prssi.02.fm
March 1, 2001
IBM [ IBM ]
