APPID Overview
The APPID feature identifies applications as constituents of application groups in TCP/UDP/ICMP traffic. It is supported on MX Series routers equipped with Multiservices DPCs and on M120 or M320 routers equipped with Multiservices 400 PICs and Aggregated Multiservices (AMS) PICs. Aggregated Multiservices PICs (ams- interfaces) enable multiple ms- interfaces to be grouped together in a single bundle and cause the traffic destined for this AMS group to be distributed over the member services PICs of the group. Junos OS Trio chipsets enable the calculation of a symmetric hash for the forward and reverse flows, and support a microcode map in the forwarding plane. This capability enables load-balancing of traffic across various services PICs in an AMS group. Starting with Junos OS Release 12.1, ams- interfaces enable an N:1 redundancy mechanism to cluster together N number of ms- interfaces in an AMS group that supports load sharing.
 | Note: For ams- interfaces and rms- interfaces, the statistics data in the bulk statistics file is collected using the reports received from the MS PICs. For the ams- interfaces, the retrieval and storage of statistics is not possible because of multiple PICs containing statistics data for the same subscriber. For interfaces in an AMS group, statistics data from different MS PICs in the AMS group are collected and aggregated on the Routing Engine where a timer control is activated and the data is saved in the bulkstats file based on this timer. This method of collection causes the statistics data in the bulkstats file to be displayed with a small delay period. |
To configure APPID, include statements at the [edit services application-identification] hierarchy level to specify parameter values for defining applications, enable or disable application rules, and gather the applications and rules into groups.
The following are related operational commands:
- show/clear application-identification application-system-cache
- show/clear application-identification counters
For more information on the CLI configuration, see the Application Identification. For more information on the operational commands, see the Junos OS Operational Mode Commands.
