J-series Services Router Features

This section describes the new J-series Services Routers features, available with the JUNOS 8.1R4 release. For more information, see the following manuals:

• J2300, J4300, and J6300 Services Router Getting Started Guide
• J4350 and J6350 Services Router Getting Started Guide
• J-series Services Router Basic LAN and WAN Access Configuration Guide
• J-series Services Router Advanced WAN Access Configuration Guide
• J-series Services Router Administration Guide

For more information about the JUNOS Internet software that runs on Services Routers, see the manuals listed in Table 5.

Interfaces and Chassis

2-port Channelized T1/E1 PIM—Enables you to configure a single Physical Interface Module (PIM) interface as a channelized T1 interface or a channelized E1 interface. The Channelized T1/E1 PIM supports channelization to the NxDS0 level in addition to all the functionality supported by regular T1 and E1 PIMs. Each interface can be configured in clear-channel, fractional, or channelized mode. To configure channelized T1 interfaces, include the ct1-pim/0/port statement at the [edit interfaces] hierarchy level. To configure channelized E1 interfaces, include the ce1-pim/0/port statement at the [edit interfaces] hierarchy level.

Note: You cannot configure a channelized T1 or E1 PIM through a J-Web Quick Configuration page. The Quick Configuration pages do not display the channelized T1 and E1 interfaces. To configure a channelized T1 or E1 PIM, you must use the J-Web configuration editor or the JUNOS command-line interface (CLI).

Class of Service

Low-latency queuing support—Low-latency, strict priority CoS queuing allows delay-sensitive data, such as voice, to be sent before packets in other queues. By detecting congestion and managing the queues, a J-series Services Router can give preference to delay-sensitive data over other traffic without impacting the lower priority queues. To configure low-latency queuing, include the strict-high statement at the [edit class-of-service schedulers scheduler-name priority] hierarchy level and the out-of-profile statement at the [edit firewall policer policer-name then] hierarchy level.

Services Router User Interface and Configuration

RPM timestamp in the forwarding subsystem—To improve latency and reduce jitter in real-time performance monitoring (RPM) from a Services Router, you can set a timestamp for the probes. The RPM probes that can be timestamped are icmp-ping and icmp-ping-timestamp. To allow probes to be timestamped by the forwarding process, include the hardware-timestamp statement at the [edit services rpm probe owner-name test test-name] hierarchy level.

Note: Please contact Juniper Networks customer support before implementing RPM timestamping on Services Routers. [PR/79847]