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Appendix A IfIndexes and Interface Identification
209664-A
Hard-Coded IfIndexes
The following IfIndex numbers are hard-coded, representing the interfaces that
are initially present in the Passport 4460.
Reserved IfIndexes and Ranges
The Passport 4460 also reserves IfIndexes for available ports on the base module
and expansion data modules. By reserving these IfIndexes, the Passport 4460
guarantees that a specific port always uses the same IfIndex. For instance, Port 1
always uses IfIndex 150 to refer to the physical interface.
The following table lists IfIndexes that are reserved for use by the ports located on
the base module.
There are three reserved IfIndexes associated with each port. For Port 1, IfIndex
150 refers to the physical port interface, 151 refers to the connector interface, and
152 refers to the frame relay service.
IfIndex Description
1 Logical Ethernet interface for routed LAN traffic
2 Virtual port for WAN traffic
3 Logical Ethernet interface for bridged LAN traffic
4 Virtual port for network management traffic
Port Number IfIndex - Physical Port IfIndex - Connector IfIndex - Service
1 150 151 152
2 153 154 155
3 156 157 158