Dell POWEREDGE 1855 - Manual (Page 27)

Baseboard Management Controller
This section provides information regarding the BMC. For detailed information regarding the BMC, see the Dell OpenManage Baseboard Management Controller
User's Guide and the Dell PowerConnect 5316M CLI Reference Guide.
IP Address-Related Items
The following items apply to the BMC IP address:
l The BMC IP address and the host port 1(the first one) IP address must be set to the same value. This means that if the host is using DHCP, the BMC
LAN channel must be turned off.
l Ensure that the gateway IP address is set to the correct subnet and the IP address is correct when routing packets to the BMC. The BMC will properly
respond to routed packets if only the IP address is correct, but some packets may be lost if the gateway IP address is incorrect.
l Any host application that monitors ports 623 and 644 cannot be executed from port 1 (the first one) of a server module. If you attempt this, the
network packets will be sent to the BMC instead of the host. Use port 2 instead.
Unsupported BMC Features and BMC Particulars
The following items describe BMC particulars and features that are not supported by the BMC on this system.
l The IPMI Shell does not allow a user with administrator-level BMC user privileges to set and change user privileges.
l The server module does not have an external serial connector; therefore, Terminal and Basic mode are not supported through a serial port for out-of-
band (IPMI) management.
l Alerts (PET), Platform Event Filters (PEF), and DHCP are not supported as there are no alert destination or IP Source options in the BMC setup.
l To prevent heavy ARP request traffic to the BMC, the BMC does not receive any ARP requests as they are routed only to the host.
l The BMC sends gratuitous ARPs every 10 seconds to allow a remote host to discover the BMC if the host's operating system is not communicating.
l The server module's front-panel power and KVM buttons are directly connected to the BMC. If the BMC program becomes misconfigured or corrupt, the
power button may not operate.
l Do not use the keyboard sequence to switch server modules or turn off the server module when updating the BMC firmware. Otherwise, the update
may fail. If this does occur, restart the update.
BMC VLAN Tagging Support
The BMC supports VLAN (Virtual LAN) tagging for network traffic. VLANs are configured on the network switch and are given a VLAN ID or tag. Ports on the
switch can belong to one or more VLAN and can have one of the following VLAN settings:
l Tagged — The packets coming out of the switch port contain the VLAN tag. In this case you should enable VLAN tags on the BMC and set the BMC VLAN
tag (or ID) to the same value as the switch port. Otherwise the BMC will not respond to incoming network traffic. Note that setting a VLAN tag on the
BMC also causes the BMC to insert the VLAN tag to all outgoing network packets.
l Untagged — The packets coming out of the switch port do not contain the VLAN tag. In this case you should disable VLAN tags on the BMC. By default,
VLAN tags are disabled on the BMC.
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NOTE: Console redirection can be set to the DRAC/MC module if use of its serial port is desired.
NOTE: See the Dell PowerConnect 5316M CLI Reference Guide for more information about using the VLAN commands.