Kcs; Lan; Table 3.1: Supported Network Protocols - Advantech MIC-3396 User Manual

3.3.2

KCS

The BMC's KCS interface is implemented according to the IPMI 2.0 specification.
Keyboard Controller Style (KCS) interfacing describes a legacy system interface
based around a bidirectional set of a status/command and data register.
This kind of interface has been adopted as system interface in IPMI and provides the
benefits of:
 Higher bandwidth than I
 Robustness.
 Auto-discovery options
3.3.3

LAN

The BMC FW supports a LAN interface providing NSCI according to the IPMI 2.0
specification
The BMC is attached to an Intel I210 network controller (LAN2) that is supporting a
sideband interface (NC-SI).
The table below lists the supported network protocols.

Table 3.1: Supported Network Protocols

Mnemonic
ARP
ICMP
IP
UDP
RMCP/RMCP+
3.3.3.1 ARP
Both standard ARP requests and reply (ARP opcodes 0x01 and 0x02) are supported
to propagate the BMC's IP address in the system. Gratious ARP is supported for
dynamic address changes or failover scenarios. Other ARP opcodes are not sup-
ported and will be ignored.
3.3.3.2 ICMP
ICMP is supported to allow network pings to/from the BMC.
3.3.3.3 RMCP/RMCP+
IPMI over LAN (IOL) uses RMCP as messaging protocol as defined in the IPMI spec-
ifications. RMCP messages consist of the basic IPMI message with some RMCP
specific overhead and use the UDP protocol for data transmission.
UDP in turn uses the IP protocol for data transport, so the network stack needs to
support the IP and UDP protocols along with RMCP.
RMCP+ was added in the IPMI v2.0 specification. It's an enhanced protocol for trans-
ferring IPMI messages and other types of payloads (e.g. serial data).
MIC-3396 User Manual
2
C or RS232 based interfaces.
Protocol
Address Resolution Protocol
Internet Control Message Protocol
Internet Protocol
User Datagram Protocol
Remote Management Control Protocol
56