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Single RS/6000 SP and Single SP Switch Router 191
Table 20. Configuration of a Dual SP Switch Router - SP Switch Connection
Configuration:
For this scenario we chose the following route settings on our three test
nodes in SP21 and on node 1 in SP2:
1. On node 1 in SP2, add the following route to the Switch network of SP21:
route add -net 192.168.14 -netmask 255.255.255.0 -mtu 65280 \
192.168.13.4
The MTU size of 65280 is the optimum size for the HIPPI connection.
2. Check for correct routing entry:
Adapter IP Address Netmask
SP Switch Router
Adapter card 1
192.168.14.4 255.255.255.128
SP Switch Router
Adapter card 2
192.168.14.129 255.255.255.128
SP Switch Router
Adapter card 3
192.168.13.4 255.255.255.0
Node 1 in SP2 192.168.13.1 255.255.255.0
Node 6 in SP21 192.168.14.6 255.255.255.0
Node 8 in SP21 192.168.14.8 255.255.255.0
Node 10 in SP21 192.168.14.130 255.255.255.0
root@sp2n01:/ 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 1103 en0 - -
127/8 127.0.0.1 U 8 408 lo0 - -
192.168.3/24 192.168.3.1 U 3 19063 en0 - -
192.168.4/24 192.168.13.4 UG 2 452 css0 - -
192.168.13/24 192.168.13.1 U 2 10135 css0 - -
192.168.14/24 192.168.13.4 UG 0 0 css0 65280-
Route Tree for Protocol Family 24 (Internet v6):
::1 ::1 UH 0 0 lo0 16896 -