IBM 9077 manual Fddi Configuration, 121

1.Identify each logical interface.

Edit /etc/grifconfig.conf, to identify each logical interface by assigning:

•An IP address

•The GRF interface name

•A netmask, as required

•A destination or broadcast address, as required

•An MTU, if needed

2.Configure PVCs and SVCs in /etc/gratm.conf.

Edit the file /etc/gratm.conf and add entries for the following keywords for a minimum configuration:

•Traffic_Shape

•Interface

•PVC

The following screen shot shows an excerpt from our scenario:

Traffic_Shape name=bigg_speed_high_quality \ peak=622000 sustain=622000 burst=2048 qos=high

Interface ga020 traffic_shape=bigg_speed_high_quality

PVC ga020 0/132 proto=ip traffic_shape=bigg_speed_high_quality

Note: the ATM OC-12c card supports up to 622 Mbit/s, as opposed to the 155 Mbit/s of the ATM OC-3c card. So you have to define new traffic shapes and assign them to the interface and the PVC.

Hint: Use gratm -n ga0<slot_the_ATM_card_is_in> to check for any errors in /etc/gratm.conf.

The actual data for the configuration we tested will be presented in Section 7.2, “ATM OC-12c Backbone - One Port” on page 222.

4.4 FDDI Configuration

This section provides information needed to configure the FDDI media card. The card has four physical interfaces that can be connected to either switches, hubs or hosts, and may be set up as four single attached stations (SAS), as two SASs and one dual attached station (DAS), or as two DASs. It operates at 100Mbit/s.

Configuration of IP-Forwarding Media Cards 121