Hardware Installation Guide for the Cisco 8100 Series Secure Routers

Slots and interfaces

Updated: April 24, 2026

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Details the available interface slots and connectivity options on the routers, guiding users in identifying and utilizing ports for network integration and device expansion.

The Cisco 8100 Series Secure Routers designates its interfaces using a 3-tuple notation that lists the slot, sub-slot, and port in the format slot/sub-slot/port. The slot number is reserved for the motherboard, which is "0". Each interface type is allocated a sub-slot and the port number is a unique port on the interface.

Table 1. Slots and Interfaces
Sub-slot 0/x/x	Interface type
0	Ethernet WAN
1	Ethernet LAN
2	DSL or Cellular
3	Cellular

Note

These interfaces located in Sub-slot 0/1 also functions as WAN Combo ports:

C8130-VAI-G2, C8130-VAP-G2: Interface Gi0/1/4

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