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Changes in Behavior and Syntax

This section lists the changes in behavior of Junos OS features and changes in the syntax of Junos OS statements and commands for Junos OS Release 15.1X53 for QFX10000 switches.


  • On QFX10000 switches, correctable (ccw_lw) and non-correctable (nccw_lw) FEC error counters and BIP-8 counters are reported.
  • Starting in Junos OS Release 15.1X53-D63, Junos system memory has been increased from 4GB to 8GB on QFX10002 switches, supporting 128K LSPs. (This change did not occur on QFX10008 or QFX10016 switches.) You can see the difference in the system memory by comparing output from the show system memory command in a pre-15.1X53-D63 release to output in 15.1X53-D63:


    user@switch> show system memory 
    System memory usage distribution:
           Total memory: 3961716 Kbytes (100%) <<<<
        Reserved memory:  115524 Kbytes (  2%)
           Wired memory:  686924 Kbytes ( 17%)
          Active memory:   74976 Kbytes (  1%)
        Inactive memory: 1393384 Kbytes ( 35%)
           Cache memory:       0 Kbytes (  0%)
            Free memory: 1690908 Kbytes ( 42%)


    user@switch> show system memory
    System memory usage distribution:
           Total memory: 7961200 Kbytes (100%) <<<<
        Reserved memory:  217328 Kbytes (  2%)
           Wired memory: 1538968 Kbytes ( 19%)
          Active memory: 2772544 Kbytes ( 34%)
        Inactive memory: 2666176 Kbytes ( 33%)
           Cache memory:       0 Kbytes (  0%)
            Free memory:  766184 Kbytes (  9%)

Interfaces and Chassis

  • On QFX10000 switches, do not configure RPF on IRB interfaces that have a Layer 2 interface configured with a MAC limit packet action of drop or drop-log.

Routing Policy and Firewall Filters

  • The set firewall filterconfiguration for PE-based QFX Series platforms is not supported. The PE-based QFX Series platforms support filters with a specified firewall family—that is, a set firewall family family filter configuration.

Software-Defined Networking (SDN)

  • Change in configuration statement for pure type-5 routing for EVPN (QFX10000 switches)—Starting in Junos OS Release 15.1X53-D60, to configure pure type-5 routes in an Ethernet VPN (EVPN) Virtual Extensible LAN (VXLAN) environment, include the ip-prefix-routes advertise direct-nexthop statement at the [edit routing-instances routing-instance-name protocols evpn] hierarchy level. When this feature was introduced in Junos OS Release 15.1X53-D30 on QFX10002 switches only, you included the ip-prefix-support forwarding-mode symmetric statement. This statement has been deprecated and is no longer supported. Any configuration with the original statement is automatically upgraded to the new ip-prefix-routes statement when you upgrade to Junos OS Release 15.1X53-D60. Pure type-5 routing is now also supported on QFX10008 and QFX10016 switches.

    [See ip-prefix-routes statement.]


  • Best practice for EVPN-VXLAN configuration (QFX10000 switches)—Starting with Junos OS Release 15.1X53-D60, in an EVPN-VXLAN configuration on QFX10000 switches, you no longer need to configure vxlan ingress-node-replication.

Related Documentation

Modified: 2017-06-26