Hi Andrew, Jeff
My 3c905B[1] (2.4.18-pre3) always autonegotiates 10baseTx Half
Duplex whenever i use a crossover cable (works fine on a 100 switch and a
10/100 Hub). The link partner is a Realtek RTL-8139A [2] (2.5.2-pre11) and
reports the following if i boot it after the 3com box;
eth0: Setting half-duplex based on auto-negotiated partner ability 0000.
Forcing 100BaseTx/FD on the 3com ends up in nothing being able to go out
the wire (destination host unreachable).
mii-diag on the 3com box gives the following
Basic registers of MII PHY #0: c000 c000 c000 c000 c000 c000 c000 c000.
The autonegotiated capability is 0000.
No common media type was autonegotiated!
This is extremely unusual and typically indicates a configuration error.
Perhaps the advertised capability set was intentionally limited.
Basic mode control register 0xc000: Auto-negotiation disabled, with
Speed fixed at 10 mbps, half-duplex.
Transceiver in loopback mode!
Transceiver currently being reset!
Basic mode status register 0xc000 ... c000.
Link status: not established.
Your link partner advertised c000:.
End of basic transceiver information.
mii-diag on the 8139A box
Basic registers of MII PHY #32: 0000 0000 0000 0000 0000 0000 0000 0000.
Basic mode control register 0x0000: Auto-negotiation disabled, with
Speed fixed at 10 mbps, half-duplex.
Basic mode status register 0x0000 ... 0000.
Link status: not established.
Link partner information is not exchanged when in fixed speed mode.
End of basic transceiver information.
All drivers are modular with no module parameters. The 3com negotiates
100BaseTx/FD in FreeBSD 4.4 and NetBSD 1.5 using the same link partner.
[1] Ethernet controller: 3Com Corporation 3c905B 100BaseTX [Cyclone] (rev 30)
[2] Ethernet controller: Accton Technology Corporation SMC2-1211TX (rev 10)
Thanks,
Zwane Mwaikambo
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This archive was generated by hypermail 2b29 : Tue Jan 15 2002 - 21:00:44 EST