6.The packet is then transferred to the Combus interface by the DMA engine.
7.The packet is sent to the IP Switch Control Board’s Router Manager across the Combus.
8.The Route Manager receives the packet and passes it to the dynamic routing software.
9.The packet is processed and global routing information is determined. 10.Route updates are broadcast across the Combus to all media cards
simultaneously.
11.Each card receives the update packet and makes changes to its route tables.
12.The packet is transferred across the media.
To ensure that dynamic routing packets are not dropped during times of heavy congestion, precedence features are used. Routing packets are given
a
2.3.3 IP Switch and Control Board
The control board, also known as the IP Switch Control Board, is accessed through Telnet or a locally attached VT100 terminal. The IP Switch Control Board is supplied with the GRF and is necessary for its operation. The VT100 terminal is not supplied with the GRF. It is only needed for the installation of the GRF.
Using terminal emulation software instead of looking for a real VT 100 terminal may be an alternative. You can use your Control Workstation or one of your SP nodes. Install the ATE package (advanced terminal emulation) on your RS/6000 and establish a serial connection between the system and the router.
After installation, all future access to the GRF can be through Telnet to the IP Switch Control Board’s administrative Ethernet.
The IP Switch Control Board is identified as slot 66 in both GRF models. A sideview of the GRF 400 slot numbering scheme is shown in Figure 15 on page 32.
Router Node 31
