IBM3229P2035
Advance
IBM Packet Routing Switch Serial Interface Converter
Contents
List of Figures ................................................................................................................ 8
List of Tables ................................................................................................................ 10
1. General Information .................................................................................................. 13
1.1 Features ......................................................................................................................................... 13
1.2 Description .................................................................................................................................... 13
2. Converter Ingress/Egress Data Flow ...................................................................... 15
2.1 Ingress Data Flow ......................................................................................................................... 15
2.1.1 Protocol Engine (PE) Ingress Interface ................................................................................. 15
2.1.2 Ingress Packet Reshuffling .................................................................................................... 15
2.1.3 Ingress Receive FIFO ............................................................................................................ 15
2.1.4 Ingress Data Aligned Serial Link Interface (IDI) .................................................................... 15
2.1.5 Data Aligned Serial Link (DASL) Port Serializer .................................................................... 16
2.1.6 Egress Data Flow .................................................................................................................. 16
2.1.7 Data Aligned Serial Link (DASL) Port Deserializer ................................................................ 16
2.1.8 Egress Data Aligned Serial Link Interface (EDI) .................................................................... 16
2.1.9 Egress FIFO .......................................................................................................................... 16
2.1.10 Egress Path Selection ......................................................................................................... 16
2.1.11 Egress Transmit Framing .................................................................................................... 16
2.1.12 Protocol Engine (PE) Egress Interface ................................................................................ 17
3. Functional Description ............................................................................................. 18
3.1 Data Interface Between IBM Packet Routing Switch Serial Interface Converter and
Protocol Engine ............................................................................................................................. 19
3.2 Functional Overview ..................................................................................................................... 19
3.2.1 Ingress Interface .................................................................................................................... 20
3.2.1.1 Bus Protocol ................................................................................................................... 20
3.2.1.2 Ingress Operation and Timing ........................................................................................ 21
3.2.2 Egress Interface .................................................................................................................... 24
3.2.2.1 Bus Protocol ................................................................................................................... 24
3.2.2.2 Egress Operation and Timing ......................................................................................... 26
3.2.3 TXFULL Timing ..................................................................................................................... 26
3.3 Packet Reshuffling ........................................................................................................................ 27
3.3.1 Ingress Receive Logical Unit Framing ................................................................................... 27
3.3.1.1 Header Bytes Reshuffling ............................................................................................... 27
3.3.1.2 Input/Output Packet Format ........................................................................................... 27
3.3.1.3 Port Addressing .............................................................................................................. 29
3.3.2 Nested TxPause Extraction ................................................................................................... 29
3.3.3 Ingress Packets for IBFC ....................................................................................................... 30
3.3.4 Egress Packet Formatter ....................................................................................................... 32
3.3.4.1 Building the Egress Packet Qualifier Byte ...................................................................... 33
3.4 Packet Buffering ............................................................................................................................ 35
3.4.1 X and Y Path Receive FIFO (RXFIFO) .................................................................................. 35
3.4.2 X/Y Path Transmit FIFO (TXFIFO) ........................................................................................ 35
3.5 Path Selection Block ..................................................................................................................... 35
prssi.02TOC.fm
March 1, 2001
Page 3 of 154
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