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Errata and Changes in Documentation for Junos OS Release 12.3 for ACX Series Routers

Errata

Class of Service (CoS)

  • The “Understanding CoS CLI Configuration Statements on ACX Series Universal Access Routers” topic in the ACX Series Universal Access Router Configuration Guide incorrectly states that the [edit class-of-service routing-instances routing-instance-name] hierarchy level is not applicable for ACX Series routers when in fact it is available.

Firewall Filters

  • Support for multifield classifiers is incorrectly omitted from the ACX Series documentation. Multifield classifiers allow fine grained classification by examination of multiple fields in the packet header—for example, the source and destination address of the packet, and the source and destination port numbers of the packet. A multifield classifier typically matches one or more of the six packet header fields: destination address, source address, IP protocol, source port, destination port, and DSCP. Multifield classifiers are used when a simple BA classifier is insufficient to classify a packet.

    In Junos OS, you configure a multifield classifier with a firewall filter and its associated match conditions. This enables you to use any filter match criteria to locate packets that require classification. From a CoS perspective, multifield classifiers (or firewall filter rules) provide the following services:

    • Classify packets to a forwarding class and loss priority. The forwarding class determines the output queue. The loss priority is used by schedulers in conjunction with the random early discard (RED) algorithm to control packet discard during periods of congestion.
    • Police traffic to a specific bandwidth and burst size. Packets exceeding the policer limits can be discarded, or can be assigned to a different forwarding class, to a different loss priority, or to both.

    Note: You police traffic on input to conform to established CoS parameters, setting loss handling and forwarding class assignments as needed. You shape traffic on output to make sure that router resources, especially bandwidth, are distributed fairly. However, input policing and output shaping are two different CoS processes, each with their own configuration statements.

    To configure multifield classifiers, include the following statements at the [edit firewall] hierarchy level:

    [edit firewall]
    family family-name {
         filter filter-name {
              term term-name {
                   from {
                        match-conditions;
                   }
                   then {
                        dscp 0;
                        forwarding-class class-name;
                        loss-priority (high | low);
                   }
              }
         }	
         simple-filter filter-name {
              term term-name {
                   from {
                        match-conditions;
                   }
                   then {
                        forwarding-class class-name;
                        loss-priority (high | low | medium);
                   }
              }
         }
    }
    

    The minimum configuration required to define a multifield classifier is the following:

    [edit firewall]
    family family-name {
         simple-filter filter-name {
              term term-name {
                   then {
                        forwarding-class class-name;
                        loss-priority (high | low | medium);
                   }
              }
         }
    }
    

    After defining the multifield classifier, you can apply the multifield classifier to an individual interface with the following configuration:

     	
    [edit interfaces]
    interface-name{
         unit logical-unit-number{
              family family {
                   filter {
                        input filter-name;
                   }
              }
         }
    }

    [ACX Series Universal Access Router Configuration Guide]

Hardware

  • In the “ACX2000 and ACX2100 DC Power Specifications” topic of the ACX2000 and ACX2100 Router Hardware Guide, the DC input voltages row in the table presented in the topic incorrectly mentions that the range is 18 to 30 VDC. The correct DC input voltage range for a nominal 24 volt operation is 20 to 30 VDC.

Routing Protocols

  • The following additional information about the support for unicast IPv6 and multicast IPv6 address families for routing instances on ACX Series routers applies to the Routing Protocols subsection in the New Features in Junos OS Release 12.3 for ACX Series Routers section of the Junos OS 12.3R1 Release Notes and the Layer 3 VPNs for IPv4 and IPv6 Overview topic of the ACX Series Universal Access Router Configuration Guide:

    Only the forwarding and virtual router routing instances support unicast IPv6 and multicast IPv6 address families. Unicast IPv6 and multicast IPv6 address families are not supported for VRF routing instances.

    [Release Notes, ACX Series Universal Access Router Configuration Guide]

  • The OSPF Configuration Guide incorrectly includes the transmit-interval statement at the [edit protocols ospf area area interface interface-name] hierarchy level. The transmit-interval statement at this hierarchy level is deprecated in the Junos OS command-line interface.

    [OSPF Configuration Guide]

Related Documentation

Modified: 2016-06-09