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Interface Configuration Guidelines

For the interfaces on a router to function, you must configure them, specifying properties such as the interface location (that is, which slot the Flexible PIC Concentrator [FPC] is installed in and which location on the FPC the Physical Interface Card [PIC] is installed in), the interface type (such as SONET/SDH or Asynchronous Transfer Mode [ATM]), encapsulation, and interface-specific properties. You can configure the interfaces that are currently present in the router, and you can also configure interfaces that are not currently present but that you might add in the future. When a configured interface appears, the JUNOS software detects its presence and applies the appropriate configuration to it. For more information on the general configuration of interfaces, see the JUNOS Network Interfaces Configuration Guide.

You can configure two different sets of properties at the interface level:

To configure default properties for the adaptive services interface, include the sp-fpc/pic/port or rspnumber statement at the [edit interfaces] hierarchy level:

(sp-fpc/pic/port | rspnumber) {
services-options {
inactivity-timeout seconds;
open-timeout seconds;
syslog {
host hostname {
services severity-level;
facility-override facility-name;
log-prefix prefix-value;
}
}
}
}

To apply services on network interfaces, include the unit statement at the [edit interfaces interface-name] hierarchy level:

unit logical-unit-number {
clear-dont-fragment-bit;
encapsulation type;
family inet {
address address {
...
}
mtu bytes;
service {
input {
[ service-set service-set-name <service-filter filter-name> ];
post-service-filter filter-name;
}
output {
[ service-set service-set-name <service-filter filter-name> ];
}
}
service-domain (inside | outside);
}
}

To configure AS or MultiServices PIC redundancy, include the redundancy-options statement at the [edit interfaces rsp number] hierarchy level:

rspnumber {
redundancy-options {
primary sp-fpc/pic/port;
secondary sp-fpc/pic/port;
}
}

This chapter contains the following sections:

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