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Appendix A IfIndexes and Interface Identification
59
Getting Started with Passport 4400, Release 4.1
IfIndex Ranges
Although the following ranges of IfIndexes may not currently be assigned, they
are reserved and you should assign them only to the indicated interface type:
• 1-4: Ethernet port assignments
• 5-32: Additional virtual ports
• 33-148: Voice assignments
• 149-206: WAN port and Expansion port assignments
Safe IfIndex Ranges
You can assign available IfIndexes between 207 and 255 when creating, for
example, a frame relay tunnel PVC, and not worry about the assignment being
overwritten when new modules are defined on the Passport 4460 unit. Go to,
•“IfIndex Overview” on page 57
•“Hard-Coded IfIndexes” on page 58
•“IfIndex Table Display Description” on page 60
Note:
If the Passport 4460 unit is set to factory defaults, the default IfIn-
dex assignment for the primary netlink is 149 or 147 (for units with only
one Ethernet Base Module port available). The Passport 4400 Install Tool
automatically deletes IfIndex assignments 149 and 147. Install Tool may
be used at any time for installation and/or configuration of the Passport
4460 unit. You should make sure the primary netlink is assigned to an
IfIndex of 207 or higher, and avoid assigning anything to either IfIndex
149 or 147.