5.2 Single SP Partition and Multiple SP Switch Router Adapter Cards
It is frequently necessary to maintain the data transfer even when an SP Switch Router Adapter fails. This scenario describes how to setup a dual, not truly redundant, connection between SP Switch Router and SP Switch (see Figure 59) and how to recover from an adapter or cable failure.
5.2.1 Configuration of a Dual SP Switch Router Connection
Configuration assumptions:
•ARP should be enabled on the SP Switch network to provide the greatest flexibility in assigning IP addresses (strongly recommended!).
FDDI | SP Switch Router |
| SP processor node |
| Adapter card 1 |
| |
| GRF 1600 | SP Switch | SP processor node |
|
| ||
|
|
| |
ATM | SP Switch Router |
| SP processor node |
Adapter card 2 |
| ||
|
|
| SP21 |
Figure 59. Connecting One SP Switch with Two SP Switch Router Adapter Cards
Table 19 shows the IP addresses used in our configuration.
Table 19. Configuration of a Dual SP Switch Router Connection
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 processor nodes in SP21 | 192.168.14.1 - | 255.255.255.0 |
| 192.168.14.15 |
|
|
|
|
Configuration:
To establish this scenario, both SP Switch Router Adapter cards have to be configured correctly. We installed them according to Section 3.7,
Single RS/6000 SP and Single SP Switch Router 187
