IBM Switch 9077 - Manual (Page 215)

Single RS/6000 SP and Single SP Switch Router 197
To recover from a failing SP Switch Adapter card, you have to define an alias
IP address for the surviving card. Follow these steps when
gt030 fails:
1. Login as root to the SP Switch Router.
2. Remove the interface of gt030 from active status:
ifconfig gt030 delete
3. Assign the alias IP address to gt050 :
ifconfig gt050 alias 192.168.14.4 netmask 255.255.255.128
Follow these steps, when gt050 fails:
1. Login as root to SP Switch Router.
2. Remove the interface of gt050 from active status:
ifconfig gt050 delete
3. Assign the alias IP address to gt030 :
ifconfig gt030 alias 192.168.14.129 netmask 255.255.255.128
After setting the alias address, verify with the grarp command that the arp
table shows the correct IP addresses and corresponding physical SP Switch
addresses, for example:
grf16:/root grarp 192.168.14.129
??? (0): 192.168.14.129 at 0:0:0:0:0:f
??? (0): 192.168.14.4 at 0:0:0:0:0:f
Both IP addresses have to show the same physical SP Switch address.
5.3 Multiple SP Partition and Multiple SP Switch Router Adapter Cards
A partitioned RS/6000 SP has some advantages: It is possible to separate
production and development systems that is, test new software in one
partition without crashing the entire system when one partition crashes. Last
but not least, several partitions can run several software versions that are
incompatible with each other in one partition.
But one large disadvantage remains: There is no high-speed connection
between several partitions. Using an IBM 9077 SP Switch Router with two SP
Switch Router Adapter cards lets you overcome this problem. You can
partition your SP
and set up a high-speed connection between several
partitions. This scenario describes how to establish such a
partition-to-partition connection (Figure 64 on page 198 and Table 21 on page
199).