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Single RS/6000 SP and Single SP Switch Router 199
Table 21 shows the IP addresses used in our configuration.
Table 21. Configuration of a Partition - Partition Connection
Configuration:
For this scenario, the following routes have to be set:
1. On node 11, node 12 and node 15 in SP2, add the following route to the
switch network of partition 1 of SP2:
route add -net 192.168.13.0 -netmask 255.255.255.128 -mtu 65520 \
192.168.13.129
The MTU size of 65520 is the optimum size for the SP Switch network.
2. Check for correct routing entries, for example:
3. On all nodes in partition 1 in SP2, add the following route to the switch
network of partition 2 in SP2:
route add -net 192.168.13.128 -netmask 255.255.255.128 -mtu 65520 \
192.168.13.4
Adapter IP Address Netmask
SP Switch Router Adapter card 1 192.168.13.4 255.255.255.128
SP Switch Router Adapter card 2 192.168.13.129 255.255.255.128
Node 11 in SP2
192.168.13.130 255.255.255.128
Node 12 in SP2
192.168.13.131 255.255.255.128
Node 15 in SP2
192.168.13.132 255.255.255.128
All other processor nodes in SP2 192.168.13.1 -
192.168.13.15
255.255.255.128
root@sp2n11:/ netstat -rn
Routing tables
Destination Gateway Flags Refs Use If PMTU Exp Groups
Route Tree for Protocol Family 2 (Internet):
default 192.168.3.37 UG 1 1188 en0 - -
10.10.1/24 10.10.1.11 U 0 16 fi0 - -
127/8 127.0.0.1 U 8 377 lo0 - -
192.168.3/24 192.168.3.11 U 8 83717 en0 - -
192.168.13/25 192.168.13.129 UG 0 12107 css0 65520 -
192.168.13.128/25 192.168.13.130 U 1 49 css0 - -
Route Tree for Protocol Family 24 (Internet v6):
::1 ::1 UH 0 0 lo0 16896 -