IBM3229P2035
IBM Packet Routing Switch Serial Interface Converter
Advance
3.6.6 IBM Packet Routing Switch Serial Interface Converter (the converter) Switch Interface
Figure 16: Converter Interface Lines
Converter Path Y
Converter Path X
8 x DASL Pairs
Switch Core Y
+/-DASL_X_RX_0
+/-DASL_X_RX_1
+/-DASL_X_RX_2
+/-DASL_X_RX_3
+/-DASL_X_RX_4
+/-DASL_X_RX_5
+/-DASL_X_RX_6
+/-DASL_X_RX_7
+/-DASL_Y_RX_0
+/-DASL_Y_RX_1
+/-DASL_Y_RX_2
+/-DASL_Y_RX_3
+/-DASL_Y_RX_4
+/-DASL_Y_RX_5
+/-DASL_Y_RX_6
+/-DASL_Y_RX_7
IBM 28.4 G
Packet
Routing
Switch
DASL
Ingress
Path X
Master
L U
Master
L U
Chip 0
8 x DASL Pairs
+/-DASL_X_TX_0
+/-DASL_X_TX_1
+/-DASL_X_TX_2
+/-DASL_X_TX_3
+/-DASL_X_TX_4
+/-DASL_X_TX_5
+/-DASL_X_TX_6
+/-DASL_X_TX_7
+/-DASL_Y_TX_0
+/-DASL_Y_TX_1
+/-DASL_Y_TX_2
+/-DASL_Y_TX_3
+/-DASL_Y_TX_4
+/-DASL_Y_TX_5
+/-DASL_Y_TX_6
+/-DASL_Y_TX_7
Master
L U
Master
L U
DASL
Egress
Path X
Chip 1
PLL
+/-Switch_X_CLK
+/-Switch_Y_CLK
MEM_GNT_Y (3:0)
MEM_GNT_X (3:0)
SEND_GNT_X
SEND_GNT_Y
3.7 Egress & Ingress Interface Diagnostic Functions
3.7.1 Loopbacks
Loopbacks are controlled through configuration registers. There are two possible paths, X and Y, for each
loopback, but an exclusive choice must be made and a path reset executed before the loopback is
performed. The IBM Packet Routing Switch Serial Interface Converter (the converter) supports two loopback
modes:
• Protocol engine (PE) X/Y loopback: the PE sends and checks data and the grant mechanism must be
bypassed (forced to all ones through configuration register)
- Protocol engine X domain loopback (register @00 bit 0 set to '1')
- Protocol engine Y domain loopback (register @20 bit 0 set to '1')
• Switch loopback: data is initiated from the switch and the switch control verifies the overall operation
- Switch X and Switch Y domain loopbacks: (register @C4 bit 1 set to '1'). Depending on the status of
the force path and select X/Y bits of registers A0 bits 21 and 22 respectively, it is possible to use
either the inService line or the select X/Y by means of bit 22 to decide which plane is selected. In the
latter case, plane X is used if set to '0' and plane Y is used if set to '1'.
Functional Description
Page 42 of 154
prssi.02.fm
March 1, 2001
IBM [ IBM ]
