Technical data

System Management Release Notes

5.16 System Parameters

5.16.3 NISCS_MAX_PKTSZ System Parameter Deﬁnition Corrected

V7.3

PEDRIVER uses NISCS_MAX_PKTSZ to compute the maximum amount of data

to transmit in any LAN packet:

LAN packet size <= LAN header (padded Ethernet format)

+ NISCS_MAX_PKTSZ

+ NISCS checksum (only if data checking is enabled)

+ LAN CRC or FCS

The following table shows the minimum NISCS_MAX_PKTSZ value required to

use the maximum packet size supported by speciﬁed LAN types. These values

are corrections of the values shown in online help and in the System Parameters

appendix of the OpenVMS System Management Utilities Reference Manual: M–Z.

Type of LAN Minimum Value for NISCS_MAX_PKTSZ

Ethernet 1498

FDDI 4468

Gigabit Ethernet 7532

ATM 7606

5.16.4 Parameter Description Changes

V7.3

Descriptions of the following system parameters have been changed or corrected

since the last release:

• DEVICE_NAMING (Alpha only)

• FAST_PATH (Alpha only)

• GLX_INST_TMO

• IO_PREFER_CPUS (Alpha only)

• LAN_FLAGS (Alpha only)

• LGI_BRK_TERM

• MAXBOBMEM (Alpha only)

• MPDEV_REMOTE (Alpha only)

• MULTITHREAD

• NISCS_MAX_PKTSZ

• NPAGECALC

• NPAGERAD (Alpha only)

• S2_SIZE (Alpha only)

• SECURITY_POLICY

• SHADOW_MBR_TMO

• SHADOW_SYS_WAIT

• SMP_LNGSPINWAIT

• SMP_SPINWAIT

System Management Release Notes 5–31