Solaris 8 says: "Link down, Cable Problem?"

I have these on my home LAN:
1. Sun Ultra 5 Solaris 8
2. Win 2000 PC
3. Win NT laptop
They are all hooked into a LinkSys Router.
The Router is hooked into my Motorala Cable Modem.
Here's the problem:
The PC and the laptop can see each other on the LAN.
The Solaris 8 is only visible on the Lan INTERMITTENTLY.
The lights on the Router for the PC and laptop are always ON.
When I reboot the Solaris box, the lights on the Router sometimes come ON, and sometimes they stay OFF. When they stay OFF, I see the message: "Link down, Cable Problem?" during reboot.
I have tried different cables, and tried various combinations of the 4 avalable ports on the back of my Router.
If I plug in the Sun box DIRECTLY into my cable modem, then I don't see the above message. (but then I don't have a LAN anymore)
Please help, I've been struggling with this for a while now.
Thanks,
Irshad Ahmed (I am relatively new to Sun)

Hi
You have not indicated if you have the router ethernet ports working
at 100Mbps or 10Mbps. Depending on this sometimes, Sun systems may
not be correctly auto-negotiating their ethernet port settings.
You may set these parameters to force Sun Ultra 5 to a 100Mbps mode or a 10Mbps mode.
For forcing it to 100Mbps, Full Duplex mode and disabling the auto-negotiation, put these entries in /etc/system:
set hme:hme_adv_autoneg_cap=0
set hme:hme_adv_100T4_cap=0
set hme:hme_adv_100fdx_cap=1
set hme:hme_adv_100hdx_cap=0
set hme:hme_adv_10fdx_cap=0
set hme:hme_adv_10hdx_cap=0
Conversely, if you want to force your Sun to work on 10Mbps, Full
duplex mode, (if your router does not support 100Mbps) in the same
/etc/system file, put the following entries :
set hme:hme_adv_autoneg_cap=0
set hme:hme_adv_100T4_cap=0
set hme:hme_adv_100fdx_cap=0
set hme:hme_adv_100hdx_cap=0
set hme:hme_adv_10fdx_cap=1
set hme:hme_adv_10hdx_cap=0
One of these should solve your problem. You need to reboot the system
after putting these entries.
You can also check the port at the OK prompt using the command
"watch-net". This test the onboard ethernet interface.
You may also apply the hme patch released by Sun that fixes many
known problems with hme ethernet driver. The patch id is 108981-03.
It is available from the site :
http://sunsolve.sun.com
HTH
Shridhar
Sun-DTS

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