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120 IBM 9077 SP Switch Router: Get Connected to the SP Switch
Figure 40. ATM OC-12c Physical and Logical Interfaces
Physical Interfaces
The ATM OC-12c media card supports one physical interface. It supports the
assignment of 220 logical interfaces out of a range of 256.
Virtual Circuits
The ATM OC-12c media card supports up to 1408 active VCs.
Virtual Paths
VPIs 0 through 3 are available for configuration use.
VCIs
On VPI 0, VCI 0 through VCI 1023 can be used; on VPIs 1-3, VCI 0 through
VCI 127 can be used.
Note
: Virtual circuits 0-31 on each VPI are reserved for signaling.
4.3.2 Installing Configurations or Changes
In the command line interface (CLI), use set and write commands to install
configuration parameters.
To save the /etc configuration directory, use
grwrite -v.
Additionally, when you enter configuration information or make changes, you
must also reset the media card with the command
grreset <slot_number> for
the change to take place.
4.3.3 Configuration Files and Profiles
The following steps to configure an ATM OC-12c card are the minimum
subset required to successfully bring up a connection. See Section 4.2.3,
“Configuration Files and Profiles” on page 113 up to Section 4.2.6,
“Configuring PVCs” on page 115, and refer to
GRF Configuration Guide 1.4,
GA22-7366
.
Proceed as follows:
Physical Interface 0
(center)
Logical Interfaces Total # of active VCsVPI VCI
0-ff (range)
1408
0-1024
0-127
0
1-3