IBM Switch 9077 - Manual (Page 225)

Multiple RS/6000 SPs and One SP Switch Router 207
With this scenario and without further tuning (refer to Appendix A, “Laboratory
Hardware and Software Configuration” on page 233 for actual
no
parameters), we measured a stable cumulative transfer rate of up to 83 MB/s
(observed with the freeware tool monitor). This was the maximum transfer
rate achievable in our environment. We are confident that further tuning and
faster nodes can achieve higher transfer rates up to the maximum of GRFs
crosspoint switch which is 100 MB/s.
6.2 Sharing Network Resources
This scenario is a combination of the scenario described in Section 6.1,
“RS/6000 SP Switch - RS/6000 SP Switch Connection” on page 203 and one
or more of the scenarios described in Section 5.1.1, “SP Switch - Ethernet
Connection” on page 157, Section 5.1.2, “SP Switch - FDDI Connection” on
page 162, Section 5.1.3, “SP Switch - ATM Connection” on page 167 and
Section 5.1.4, “SP Switch - FDDI Connection (Distinct FDDI Networks)” on
page 174. In an extended network, resources are always rare. This scenario
might help to share these resources between several SPs and at the same
time to connect these SPs with a high speed connection (see Figure 66).
Figure 66. Sharing Network Resources between Two SPs
To establish this scenario, simply follow the steps in Section 6.1, “RS/6000
SP Switch - RS/6000 SP Switch Connection” on page 203 first. If all tests are
successful, set up the connection from each SP and its nodes to the required
network resources. Follow the steps given in Section 5.1, “Single SP Partition
and Single SP Switch Router Adapter Card” on page 157. We found no
SP Switch
SP processor node
SP processor node
partition
SP Switch
SP processor node
SP processor node
partition
GRF 1600
SP Switch Router
Adapter card 2
SP Switch Router
Adapter card 1
SP 21
SP 2
FDDI
Ethernet
HIPPI
ATM