Network Router User's Manual

Using the Command-Line Interface 1-5
Subcard Numbering
Subcard Numbering
Subcards are numbered from 0 to 1, left to right. Subcards include half-width port adapters
and full-width interface modules (such as an OC-12 interface module).
Two half-width port adapters can occupy one chassis slot. Figure1-2 shows that the two
half-width port adapters in slot 0 are numbered subcards 0 and 1, from left to right. The port
adapter in the left slot is numbered subcard 0, and the port adapter in the right slot is
numbered subcard 1.
When you apply this numbering scheme to full-width interface modules, the subcard
number is 0, because only one full-width interface module fits in a card slot. See Figure1-2.
So, the subcard portion of the card/subcard/port CLI variable is either 0 or 1 for half-width
port adapters, and 0 only for full-width interface modules. For example, in 0/0/1 the second
0 represents subcard 0.
Figure1-2 Subcard Numbering