Appendix D Arranging slots and numbering
interfaces
Slot arrangement
The router provides SIC slots. You can expand two SIC slots to one DSIC slot by removing the slot divider.
All fixed ports on the MSR20-1X belong to slot 0.
Table 16
MSR20-1X slot arrangement
Model Slot
arrangement
All models
—SIC slot
—DSIC slot
Numbering interfaces
The interfaces of the router are numbered in the form of
interface-type
X/Y
,
Where,
•
interface-type
—Type of an interface such as serial, asynchronous, or Ethernet port.
•
X
—Number of the slot where an interface module resides.
•
Y
—Sequence number of an interface on an interface module.
Interfaces on the same interface module have the same slot number X, and are numbered from 0 in
ascending order from left to right when you face the interface module.
•
For example, the fixed WAN port on the MSR20-1X is nubmered Ethernet 0/0, the four fixed
Ethernet LAN ports are numbered Ethernet 0/1, Ethernet 0/2, Ethernet 0/3, and Ethernet 0/4.
•
The interface module SIC-4FSW is installed in slot 1. The Ethernet ports on the interface module are
numbered from left to right: Ethernet 1/0, Ethernet 1/1, Ethernet 1/2, and Ethernet 1/3.
1
