68 IBM Eserver Certification Study Guide: Cluster 1600 Managed by PSSP
pSeries family. The SPs shared-nothing architecture gives rise to two key
concept when attaching peripherals:
1. Each node has I/O slots. Think of each node as a stand-alone machine when
attaching peripherals. It can attach virtually any peripheral available to the
RS/6000 family, such as SCSI and SSA disk subsystems, Magstar® tape
drives, and so on. The peripheral device attachment is very flexible, as each
node can have its own mix of peripherals or none at all.
2. From an overall system viewpoint, as nodes are added, I/O slots are added.
Thus, the scalability of I/O device attachment is tremendous. A 512-node high
node system would have several thousand I/O slots.
When you attach a disk subsystem to one node, it is not automatically visible to
all the other nodes. The SP provides a number of techniques and products to
allow access to a disk subsystem from other nodes.
There are some general considerations for peripheral device attachment:
Devices, such as CD-ROMs and bootable tape drives, may be attached
directly to SP nodes. Nodes must be network-installed by the CWS or a
boot/install server.
Many node types do not have serial ports. High nodes have two serial ports
for general use.
Graphics adapters for attachment of displays are not supported.
2.11 Network connectivity adapters
The required SP Ethernet LAN that connects all nodes to the control workstation
is needed for system administration and should be used exclusively for that
purpose. Further network connectivity is supplied by various adapters, some
optional, that can provide connection to I/O devices, networks of workstations,
and mainframe network. Ethernet, FDDI, Token-Ring, HIPPI, SCSI, FCS, and
ATM are examples of adapters that can be used as part of an SP system.
SP administrative LAN Ethernet adapter rules
For the SP internal nodes that reside in the SP frame the SP Ethernet uses the
integrated Ethernet ports. It has to be en0 for the SP LAN. For some older nodes
the adapter has to be in slot 1. In SP-attached servers that have LPAR
capabilities the Ethernet adapter for the SP administrative LAN does not have to
be en0; it can occupy any available slot.
Administrative
LAN and
Ethernet
adapter rules
Chapter 2. Validate hardware and software configuration 69
The supported Ethernet adapters are:
10/100 Mbps Ethernet PCI Adapter II (F/C 4962) – Required for 7026 servers
10/100 Ethernet 10BASE-TX adapter (F/C 2968) (withdrawn 12/01)
10 MB AUI/RJ-45 Ethernet adapter (F/C 2987) (withdrawn 7/01)
10 MB BNC/RJ-45 Ethernet adapter (F/C 2985)
Table 2-15 shows the SP administrative LAN requirements for the Ethernet
adapters.
Table 2-15 Administrative Ethernet adapter locations
For the M/T 7038 and M/T 7039 servers, the Ethernet adapters are restricted to
10/100 Mbit for the administrative Ethernet. The use of Gigabit Ethernet adapters
is allowed for other external network connections. See Figure 2-30 on page 70
for an overview of the administrative LAN connections.
SP-attached server Location for Ethernet adapter
M/T 7017 Must be installed in slot 5 of the primary I/O drawer (en0).
M/T 7026 Must be installed in slot 1 of the primary I/O drawer (en0).
M/T 7028
a
a. If the administrative LAN connections are made to the native Ethernet ports on the HMC and the
p655 or p630 servers, then additional adapters are not required for those components.
Native, integrated Ethernet port used. Connected to the
administrative Ethernet adapter in the HMC, and also
connects to the Ethernet adapter in the CWS.
M/T 7039
a
Native, integrated Ethernet port used. Connected to the
administrative Ethernet adapter in the HMC, and also
connects to the Ethernet adapter in the CWS.
M/T 7040 Generally one Ethernet adapter in each LPAR and one
administrative Ethernet adapter in the HMC.
M/T 7040 LPAR with SP
Switch2
The LAN adapters must be placed in I/O subsystem slot 8
using the same respective LPAR as the switch adapter.
Place a second LAN adapter in slot 9.
M/T 7040 LPAR with SP
Switch
The LAN adapter must be placed in the same respective
LPAR as the switch adapter, but does not need to be in the
same I/O subsystem.

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