Sun Microsystems 1.0 User Manual
122
SunFDDI/P 1.0 Adapter User’s Guide—May 1997
10
DLPI Addressing
DLPI addressing is implemented as a DLSAP (data link service access point)
address. Each DLSAP consists of a physical address plus a service access point
(SAP). The format of the DLSAP is provider-dependent. Figure 10-3 shows the
general format of the SunFDDI/P DLSAP.
address. Each DLSAP consists of a physical address plus a service access point
(SAP). The format of the DLSAP is provider-dependent. Figure 10-3 shows the
general format of the SunFDDI/P DLSAP.
Figure 10-3 SunFDDI/P DLSAP Format
Information returned by the
DL_INFO_ACK
primitive (in response to a
DL_INFO_REQ
) is used to specify the encoding and decoding rules to insert
and extract the DLSAP for a given data link provider. The information
returned by the SunFDDI/P device driver is shown in Table 10-1.
returned by the SunFDDI/P device driver is shown in Table 10-1.
Table 10-1
DL_INFO_REQ
Frame
Element
Value
Description
dl_max_sdu
4352 bytes
Maximum MTU
dl_min_sdu
0 bytes
Minimum MTU
dl_addr_length
8 bytes
Length of DLSAP
dl_mac_type
DL_FDDI
FDDI MAC layer
dl_reserved
0
Unused
dl_current_state
—
Current state of data link provider
dl_sap_length
-2 bytes
Length of DLSAP
dl_service_mode
DL_CLDLS
Connectionless service
dl_qos_length
0
Not supported
TYPE
6 Bytes
2 Bytes
DSAP
ORG
SSAP CTL
LLC
SNAP