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Configuration of IP-Forwarding Media Cards 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:
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.
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