I have a bladecenter H chasis with 4 swtiches BNT Layer 2/3 and 22 bladeServer HS22 with two onboard Ethernet adapter and one combo card (44X1940 FC x2 /Ethernet x2) on each blade.
Only switches on bay 1 and 2 are pluged in and have patch cord.
The problem (only with redhat 4/5 Enterprise Edition) is that i want to install Redhat over lan.
First the blade server boot via PXE, this works just fine. So, the RedHat begins installation but can't obtain an IP address from DHCP server for eth0. I set it up manually. Afeter that i get the following message: Could not connect with image repository, please mount installation media.
I do not understand why the blade boot fine via PXE, but when RedHat installation begin the network connection is lost.
Does anyone have any idea?
Thank! and sorry about my english!
Pinned topic RedHat 5 - Boot PXE but DHCP can't configure an IP on eth0
Answered question This question has been answered.
Unanswered question This question has not been answered yet.
Updated on 2010-10-31T22:25:22Z at 2010-10-31T22:25:22Z by RodrigoEsteban
sdenham 100000263Q3 Posts
Re: RedHat 5 - Boot PXE but DHCP can't configure an IP on eth02010-10-28T20:15:38ZThis is the accepted answer. This is the accepted answer.This symptom often indicates the switches are configured to do spanning-tree searches. When RHEL's anaconda installer configures the Ethernet port, it disables it and re-enables it. If the port is set to do spanning tree, the time it takes the port to become ready again may be many seconds, and longer than the timeout period in anaconda, so the 2nd PXE request appears to fail even though the inital one worked. For Cisco switches the solution is to set the port to "portfast" mode - other switch families have similar settings, sometimes distinguishing whether the port goes to a server or another switch.
RodrigoEsteban 2700006G1T2 Posts
Re: RedHat 5 - Boot PXE but DHCP can't configure an IP on eth02010-10-31T22:25:22ZThis is the accepted answer. This is the accepted answer.
- sdenham 100000263Q
The problem was that bladeserver switchs over the order of networks adapter, so for RedHat eth0 is the port connected to switch in bay 7, eth1 for switch in bay 9, eth2 for switch in bay 1 and eth3 for switch in bay 2.
Basically the only thing i have to do was plug all switches (only switchs in bay 1 & 2 were connected)to the network.