J-series Services Routers support network interfaces for E1, E3, T1, T3, Fast Ethernet, Gigabit Ethernet, serial, Point-to-Point Protocol over Ethernet (PPPoE), and ISDN media. In addition, the router supports a set of special interfaces for such tasks as router identification and security services. Each type of interface has particular physical and logical characteristics.
To configure and monitor Services Router interfaces, you need to understand their media characteristics, as well as physical and logical properties such as IP addressing, link-layer protocols, and link encapsulation.
This chapter contains the following topics. For more information about interfaces, see the JUNOS Network Interfaces Configuration Guide, the JUNOS Services Interfaces Configuration Guide, and the JUNOS Interfaces Command Reference.