On 05/09/2017 07:15 PM, John Andersen wrote:
On May 9, 2017 1:53:42 PM PDT, Lew Wolfgang <wolfgang@sweet-haven.com> wrote:
Our Supermicro mobos have a dedicated IPMI RJ-45 that if not active, will fallover to the first motherboard RJ-45. This can be very confusing when you run with a network switch that doesn't allow multiple MAC addresses on a single interface! Our older Supermicros would unconditionally fallover, but later ones have a control in the BIOS that you can use to disable that unfortunate characteristic.
Regards, Lew Where do you find a switch that can only support one machine address per port?
Is that something you sought out for security reasons?
Sounds like built in obsolescence to me.
It wasn't my idea! We had to use the switches the customer provided that used MAC address authentication. The MAC address had to be pre-registered in an LDAP database. The MAC could be used anywhere on the network, but an un-registered MAC would be connected to a "rogue" VLAN. The IPMI fallover MAC address on the Supermicro motherboards would bump the switch and you'd wind up in quarantine. They then tightened it down even further where any one switch port could only register one MAC at a time. They did this to control virtual hosting. Very confusing until you figure out what was going on. Intermittent loss of connectivity. Connecting to eth1 on the motherboard and registering that MAC fixed everything. I believe they were Brocade Fastiron switches. Regards, Lew -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org