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 from Junos OS Release 14.1R9 for the EX Series.
Dynamic Host Configuration Protocol
DHCP clients can send packets without Option 255 (EX9200)—On EX Series switches, starting with Junos OS Release 14.1R4, you can override the default configuration of the DHCP local server and enable clients to send DHCP packets that do not include Option 255 (end-of-options). The default behavior in Junos OS is to drop packets that do not include Option 255. To override that default behavior, configure the allow-no-end-options CLI statement at the [system services dhcp-local-server overrides] hierarchy level.
Interfaces
Change to CLI options for interface speed—On EX9200 switches, the CLI command set interfaces interface-name speed auto-10m-100m is not supported.
Network Management and Monitoring
New system log message indicating the difference in the Packet Forwarding Engine counter value (EX9200)—Effective in Junos OS Release 14.1R3, if the counter value of a Packet Forwarding Engine is reported lesser than its previous value, then the residual counter value is added to the newly reported value only for that specific counter. In that case, the CLI shows the MIB2D_COUNTER_DECREASING system log message for that specific counter.
Platform and Infrastructure
Changes in show chassis hardware command output descriptions for EX9200 components—Starting with Junos OS Release 14.1, the output of the show chassis hardware command includes descriptions for enhanced midplanes on EX9204 and EX9208 switches (enhanced midplanes are already on EX9214 switches and their descriptions included in the show chassis hardware command output) and the high-speed SF module EX9200-SF2, as highlighted in the following sample:
user@switch> show chassis hardwareHardware inventory: Item Version Part number Serial number Description Chassis JN1221A03RFC EX9204 Midplane REV 01 750-053633 ACRA1451 EX9204-BP FPM Board REV 04 760-021392 ABCB4822 Front Panel Display PEM 0 Rev 10 740-029970 QCS1251U020 PS 1.4-2.52kW; 90-264V AC in PEM 1 Rev 10 740-029970 QCS1251U028 PS 1.4-2.52kW; 90-264V AC in Routing Engine 0 REV 02 740-049603 9009153805 RE-S-EX9200-1800X4 Routing Engine 1 REV 02 740-049603 9009153993 RE-S-EX9200-1800X4 CB 0 REV 08 750-048307 CABC6474 EX9200-SF2 CB 1 REV 10 750-048307 CABH8948 EX9200-SF2 ...