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© Copyright IBM Corp. 1998 5
Chapter 2. Router Node
The first dependent node is actually a new SP Switch Router Adapter in a
router. This chapter offers more details about the implementation.
Section 2.1, “Overview” on page 5 gives you an overview of SP Switch
Router. This is probably the best to get an impression what the GRF is good
for. Also a functional- and a price-comparison between using an RS/6000 SP
node and the SP Switch Router is included.
More details about the underlaying Software and Hardware can be found in
Section 2.2, “GRF Software” on page 18 and Section 2.3, “GRF Hardware” on
page 24.
Section 2.4, “PSSP Enhancements” on page 40 describes the enhancements
in the PSSP Software for the support of the dependent node.
Some planning considerations which should be considered can found in
Section 2.5, “Planning for the GRF” on page 63 and Section 2.6, “Planning for
the Dependent Node” on page 65.
2.1 Overview
The purpose of the SP Switch Router Adapter is to allow the GRF ("goes
really fast"), manufactured by Ascend, to forward SP Switch IP traffic to other
networks. The GRF was known as the High Performance Gateway Node
(HPGN) during the development of the adapter. IBM remarkets models of the
GRF that connect to the SP Switch as the SP Switch Router model 04S
(9077-04S) and model 16S (9077-16S). These models are not available
directly from Ascend.
Note: In the remainder of this book, we refer to the SP Switch Router as the
GRF.
The distinguishing feature of the GRF, when compared with other routers, is
that it has an SP Switch Router Adapter and therefore can connect directly to
the SP Switch (see Figure 1 on page 6).