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Autonegotiation fail with Gigabit

 
Jimmy_13
Advisor

Autonegotiation fail with Gigabit

HI,

I have a Superdome 32 way with HP A6847-60101 PCI 1000Base-SX Adapter and a switch Cisco 3508G-XL.

Both work well, but the networking guys wolud like to turn off the autonegotiation. Whe the autonegotiation is off in both devices, the link fall.

One of two need is with autonegotiation on for the link work.

which it could be the problem?
Thanks

7 REPLIES 7
Michael Steele_2
Honored Contributor

Re: Autonegotiation fail with Gigabit

Ask the network guys what speed and duplex. Verify speed to be 1000. Refer to lanadmin to change your NIC's speed and duplex and lanscan to find the NMID / PPA number.

# lanscan (* write down NMID / PPA *)

This will list current speed and duplex:

# lanadmin -x 4 (* 4 = NMID *)

This will change :

# lanadmin -X 1000FD 4

1000 = speed
FD = Full duplex
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Pete Randall
Outstanding Contributor

Re: Autonegotiation fail with Gigabit

Jimmy,

Gigabit cards can not be manually set - they must be allowed to auto-netgotiate.


Pete

Pete
Alzhy
Honored Contributor

Re: Autonegotiation fail with Gigabit

Same here..

Our experence with CISCO's and 1000-SX cars is that both link partners should always be set to "auto-negotiate"
Hakuna Matata.
Steven E. Protter
Exalted Contributor

Re: Autonegotiation fail with Gigabit

Tell the networking guys to find something else to do.

It is very clear in the documentation for each and every 1000 BaseT card HP certifies for its HP-9000 servers. Autonegotiate on the switch and the software settings for the card.

No exceptions.

!00 BaseT cards are better off with manual settings, hard coded into /etc/rc.config.d/hpbtlanconf

SEP
Steven E Protter
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Stefan Farrelly
Honored Contributor

Re: Autonegotiation fail with Gigabit

Weve had similar problems - you simply have to leave HP Gigabit cards with Autonegotiation set to ON, and same at switch end. You cannot switch it off, not matter what you do, weve tried.

Im from Palmerston North, New Zealand, but somehow ended up in London...
Geoff Wild
Honored Contributor

Re: Autonegotiation fail with Gigabit

We went through the same thing here when we switched from FDDI to Gigabit Ethernet - all ports on the Cisco which are used by 1000 SX cards have to be set to auto-negotiate.

Rgds...Geoff

Proverbs 3:5,6 Trust in the Lord with all your heart and lean not on your own understanding; in all your ways acknowledge him, and he will make all your paths straight.
Michael Steele_2
Honored Contributor

Re: Autonegotiation fail with Gigabit

Thanks Guys!

Didn't know that.
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