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Known Behavior

This section lists known behavior, system maximums, and limitations in hardware and software in Junos OS Release 15.1X53-D55 for EX2300 and EX3400 switches.

For the most complete and latest information about known Junos OS defects, use the Juniper Networks online Junos Problem Report Search application.

Class of Service

  • EX2300 switches do not support CoS over integrated routing and bridging (IRB) interfaces.
  • EX2300 switches support onlyTCP as a loss-priority protocol. The any option is not supported.
  • On EX2300 and EX3400 switches, the drop-profile-map loss-priority statement does not display the medium-low loss-priority option.

Platform and Infrastructure

  • EX2300 switches do not support virtual routing and forwarding (VRF) instances on VPNs.
  • EX2300 and EX3400 switches do not support IPv4 or IPv6 source guard.
  • On EX2300 and EX3400 switches, protocol hello timers for LACP, VRRP, and BFD must be configured to more than 2 seconds to prevent protocol flaps during system events such as Routing Engine switchover and interface flaps.
  • EX2300 switches do not support unicast RPF(uRPF).
  • EX2300 switches do not support neighbor discovery inspection.
  • On EX2300-48T switches, traffic loss is expected for line rate traffic with 64 byte frames on 10-gigabit interfaces.

Routing Policy and Firewall Filters

  • EX3400 switches do not support filter-based forwarding (FBF) of IPv6 traffic.
  • EX2300 switches do not support a combination of (router) firewall filters, ingress port firewall filters, and ingress VLAN firewall filters on the same interface.

Virtual Chassis

  • Automatic software update limitations (EX2300 and EX3400 Virtual Chassis)—Automatic software updates are not supported on EX2300 or EX3400 Virtual Chassis running Junos OS Releases 15.1X53-D50 through 15.1X53-D52 when the target update release is Junos OS Release 15.1X53-D55 or later releases. Automatic software updates are supported within the range of release versions Junos OS Releases 15.1X53-D50 through 15.1X53-D52, or from Junos OS Release 15.1X53-D55 to later releases.

    [See Understanding Automatic Software Update on Virtual Chassis Member Switches.]

Related Documentation

Modified: 2017-07-21