IBM Switch 9077 User Manual

Page 249

Multiple RS/6000 SPs and Multiple GRFs

231

5. Issue some

ping

commands to check the connection:

On the SP21 nodes,

ping

the SP Switch interface of nodes in SP2; on

nodes in SP2

ping

the SP Switch interface of nodes in SP21.

If these

ping

commands fail, check routing settings again. If everything is

as it should be, try to

ping

the SP Switch Router HIPPI media card or the

SP Switch Router Adapter card to find the failing part:

ping 192.168.14.4

(on SP21 processor nodes)

ping 192.168.13.4

(on SP2 processor nodes)

ping 10.50.1.1

and

ping 10.50.1.2

(on both the GRF 400 and the GRF

1600)

If any errors occur, check cabling, the configuration of SP Switch Router
media cards (see Section 3.7, “Step-by-Step Media Card Configuration”
on page 86 and S ection 4.5, “HIPPI Configuration” on page 133) and SP
Switch adapters in the SP nodes.

Note: Both HIPPI media cards must be online and cabled, or

ping

will not

succeed.

Performance:
To get a rough overview of the data transfer rates that can be achieved in this
scenario, the following test was performed:

1. We used ftp to conduct several file transfers of a 300 MB file from the

nodes in SP2 to one chosen node in SP21, and at the same time used ftp
to conduct several file transfers of a 300 MB file from the nodes in SP21 to
a chosen node in SP2. We sent the files to /dev/null on the receiving node
to eliminate any hard disk influence.

root@sp2en0:/ dsh netstat -rn | grep 192.168.14
sp2n01: 192.168.14/24 192.168.13.4 UG 6 575324 css0 65280 -
sp2n05: 192.168.14/24 192.168.13.4 UG 1 316772 css0 65280 -
sp2n06: 192.168.14/24 192.168.13.4 UG 0 77420 css0 65280 -
sp2n07: 192.168.14/24 192.168.13.4 UG 3 272682 css0 65280 -
sp2n08: 192.168.14/24 192.168.13.4 UG 1 237408 css0 65280 -
sp2n09: 192.168.14/24 192.168.13.4 UG 2 298665 css0 65280 -
sp2n10: 192.168.14/24 192.168.13.4 UG 4 367369 css0 65280 -
sp2n11: 192.168.14/24 192.168.13.4 UG 4 667058 css0 65280 -
sp2n12: 192.168.14/24 192.168.13.4 UG 1 423454 css0 65280 -
sp2n13: 192.168.14/24 192.168.13.4 UG 1 566707 css0 65280 -
sp2n14: 192.168.14/24 192.168.13.4 UG 0 196490 css0 65280 -
sp2n15: 192.168.14/24 192.168.13.4 UG 0 2 css0 65280 -
root@sp2en0:/