Ipmi Over Lan - Cisco C880 M5 Configuration Manual

2.2 IPMI over LAN

2.2
IPMI over LAN
IPMI-over-LAN is the current name for the specification of the LAN interface in the
IPMI standard. This specification stipulates how IPMI messages can be sent to or
from the BMC of a managed system - encapsulated in RMCP (Remote Management
Control Protocol) data packets. These RMCP data packets are transferred via an
Ethernet LAN connection using the UDP (User Datagram Protocol) under IPv4
(Internet Protocol Version 4).
The RMCP protocol has been specified to support the management of system
statuses in which the operating system is not running. The RMCP is a simple
inquiry/response protocol.
The interface for such a connection is provided on an onboard LAN controller
assigned to the BMC.
The interface can only be provided by an on-board LAN controller, not by
an inserted LAN card.
Of the two ports that RCMP uses under UDP, the BMC communicates with the
LAN controller via port 623 (primary RMCP Port).
Figure 3: BMC and LAN controller
13
Cisco C880 M5 Configuration Guide