Service Location Protocol (SLP) using multicast addressing
If you are not using the service processor host name or internet address
to discover the server on the network, then multicast addressing with Service
Location Protocol (SLP) is used. To configure SLP discovery, you must configure
your iSeries™ server. Do the following steps.
- Using the procedure described in Change service processor configuration properties:
- Ensure that the Use service processor connection to determine
remote system enclosure identity option is not selected.
- In the Serial number field, specify the serial number
of the stand-alone server enclosure or the IBM® BladeCenter™ chassis.
- Using the procedure described in Change remote system configuration properties,
ensure that the remote system identity is set correctly:
- For a stand-alone server, select the Use enclosure identity
from the service processor configuration option.
- For a IBM BladeCenter blade, select the Use the
following values option and specify the blade serial number.
The service processor advertises itself with a SLP packet sent on the network
using multicast addressing. This packet includes attributes such as the serial
number, type, and model of the remote server. IBM Director receives this packet and saves
information about the server. The serial number from the service processor
configuration enclosure identifier or the remote system configuration remote
system identifier are mapped to the attributes learned from the SLP discovery
process to identify a specific remote server.
Advantages:
- Only the serial number, which can be obtained from a label on the server,
is needed to discover the remote server.
- If the service processor obtains its IP address from a DHCP server and
the network supports IP multicasting, then the factory default settings of
the service processor can be used.
Disadvantages:
- SLP is only supported by the Remote Supervisor Adapter II service processor
and the IBM BladeCenter Management Module service processor. It is
not supported by Baseboard Management Controller (BMC) service processors.
- Routers and switches located between the service processor and the iSeries LAN adapter must be configured to support multicast addressing. If not
properly configured, routers will not propagate multicast packets. Consult
your router documentation to determine how to configure it to allow multicast
addressing. The Service Location Protocol uses IP address 239.255.255.253
and port number 427. This information may be required to configure routers
to support multicast SLP packets.
