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Chapter 3 Network Configuration 33
the device and its link partner. Attempting to link-up with autonegotiation disabled
requires knowledge of the current capabilities at which both the device and its link
partner are configured.
The structure of the boot net command line that includes device parameters is as
follows:
Where:
s = 1000, 100, 10, auto
d = half, full, auto
c = master, slave, auto
Note – Refer to the IEEE 802.3 (G)MII register specification for the details on
autonegotiated and non-autonegotiated modes of operation. (This establishes the
link successfully so that traffic is transfered without collisions caused by duplex
mismatch between the local and remote devices both the local and remote link
capabilities must be matched.)
TABLE 3-1 depicts the device link parameters you can specify on the boot net
command line to establish a link between the local and remote device.
TABLE 3-2
shows the speed, duplex and link-clock capabilities at which a link-up will be
attempted:
ok boot device-path:speed=s,duplex=d,link-clock=c,promiscuous,
TABLE 3-1 Device Link Parameters
Device Parameters Device Link Capability
speed duplex link-clock autoneg 1000fdx 1000hdx 100fdx 100hdx 10fdx 10hdx
1000 full master/slave 0000000
1000 half master/slave 0100000
1000 full auto 1111111
1000 half auto 1011111
1000 auto 1111111
1000 1111111
1000 auto 1111111
100 full N/A 0 0 0 1 0 0
100 half N/A 0 0 0 0 1 0