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ProLiant Servers (ML,DL,SL)
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DL160 G5 coming up at 10Mbps/Half-duplex

Joshua Baker-LePain
Occasional Visitor

DL160 G5 coming up at 10Mbps/Half-duplex

I've got over 100 DL160 G5s all running CentOS 5.3 (i.e. RHEL 5.3) x86_64 and attached to Foundry switches. At boot time, I've noticed that random nodes are negotiating at 10Mbps/half-duplex rather than 1Gbps/full-duplex. The problem is not restricted to the same rack (or even model of switch in the rack). A reboot of the affected nodes (or even a 'service network restart') usually fixes the problem. I'm running the most recent BIOS and just upgraded the network adapter firmware, and the problem persists. Any ideas?
Regular Advisor

Re: DL160 G5 coming up at 10Mbps/Half-duplex

I've seen the same with ML115 G5, which uses the same NC105i embedded NIC, when running ESXi. My solution was simply to set server and switch to 1000/full (*must* set both ends!).