Lexmark IBM 9077 manual Configuration of SP Switch Fddi Connection Bridging

Table 18 shows the IP addresses used in our configuration.

Table 18. Configuration of SP Switch - FDDI Connection (Bridging)

Adapter	IP Address
FDDI interface in node 9	10.10.1.9
FDDI interface in node 10	10.10.1.10
FDDI interface in node 11	10.10.1.11
FDDI interface in node 12	10.10.1.12
Bridge Group bg0	10.10.1.13
SP Switch Router Adapter card 1	192.168.14.4
SP processor nodes in SP21	192.168.14.1 - 192.168.14.15 (See
	Appendix A, “Laboratory Hardware and
	Software Configuration” on page 233.)

To successfully run this configuration, make sure that all four different FDDI backbones are logically located in one subnet. Otherwise, bridging does not work and routing has to be used. Nevertheless, the GRF simultaneously supports routing and bridging which means that an interface included in a bridge group is able to handle bridge layer-2 frames and route layer-3 packets simultaneously. For details, refer to Section 4.6, “Configuring Bridging” on page 142.

Note: All FDDI backbones have to be logically located in a single IP subnet for proper bridging. The GRF supports simultaneous routing and bridging over one interface.

In this sample configuration, no routes need to be set on the SP Switch Router. Node 9-12 on SP2 and the processor nodes in SP21 require attention, though. Additionally, the bridge group has to be configured. To perform this configuration, follow these steps:

1.Configure the bridge group on the GRF 1600.

•Define the bridge group:

Open the file /etc/bridged.conf with bredit or vi. If /etc/bridged.conf does not exist, a new file can be created or the /etc/bridged.conf.template can be renamed to /etc/bridged.conf. Enter the necessary bridge group information:

Single RS/6000 SP and Single SP Switch Router 181