Changes in Default Behavior

• To enable BGP route reflectors, J-Flow traffic analysis, and data link switching (DLSw) on a J-series Services Router, you must purchase and install separate software licenses. From JUNOS Release 8.5 onwards, if you have not installed a valid license, the BGP router reflectors and J-Flow traffic analysis features do not function. If these features are added to the configuration and committed, the configuration will be updated and a license warning message will be displayed. [Getting Started Guide for your router]
• Pings between customer edge (CE) routers might fail because all J-series routers now have enforced hard licensing. [J-series Services Router Administration Guide]
• On 4-port Fast Ethernet ePIMs installed in J4350 and J6350 Services Routers, you can configure a maximum transmission unit (MTU) size of only 1518 bytes even though the CLI indicates that you can configure an MTU of up to 9192 bytes. If you configure an MTU greater than 1518 bytes, the router does not accept the configuration and generates a system log error message similar to the following: “/kernel: fe-3/0/1: Illegal media change. MTU invalid: 9192. Max MTU supported on this PIM: 1518.” [J-series Services Router Basic LAN and WAN Access Configuration Guide; JUNOS Interfaces Command Reference]
• Previously, the show chassis fpc command output for selected J-series Services Routers showed just the slot into which a 2-slot-high PIM was physically inserted. Now the output of the show chassis fpc, show chassis fpc slot, and show chassis fpc slot detail commands also indicates the slot that is unusable. [Getting Started Guide for your router;JUNOS System Basics and Services Command Reference]
• The output of the show chassis fpc and show chassis hardware commands has been modified to indicate when an interface type is not supported for a particular software release or in a particular PIM slot on J-series Services Routers. [Getting Started Guide for your router;J-series Services Router Basic LAN and WAN Access Configuration Guide]
• On a J-series Services Router, link fragmentation and interleaving (LFI) and Multilink Point-to-Point Protocol (MLPPP) support has been extended to serial interfaces. This support on serial interfaces is the same as the existing LFI and MLPPP support on T1 and E1 interfaces. [J-series Services Router Basic LAN and WAN Access Configuration Guide]
• When you configure a serial interface in loop-timed DTE mode, the Clock rate field is no longer displayed in the output of the show interfaces command. [JUNOS Interfaces Command Reference]
• For 6-Port SFP Gigabit Ethernet uPIMs on J-series Services Routers, the show chassis hardware command output now displays information about small form-factor pluggable transceivers (SFPs). [Getting Started Guide for your router;J-series Services Router Basic LAN and WAN Access Configuration Guide;JUNOS System Basics and Services Command Reference]
• The MTU has been reduced from 9192 to 9150 bytes on the following J-series interfaces: ADSL PIM interfaces, G.SHDSL PIM interfaces, built-in serial interfaces, and Dual-Port Serial PIM interfaces. [J-series Services Router Basic LAN and WAN Access Configuration Guide]
• A new DHCP server option has been added to J-series Service Routers. The option allows you to specify the next server used for DHCP communication after a boot client establishes initial contact. Use of this feature inserts an IP address into the siaddr field of a DHCP protocol packet. To specify the next DHCP server, include the next-server statement at the [edit system services dhcp], [edit system services dhcp poolpool id], or [edit system services dhcp static-binding mac-address] hierarchy level. [J-series Services Router Administration Guide]
• Automatic reenrollment support has been added for IPSec digital certificates before expiration. You can configure the percentage of the validity end time (specified in the certificate) when automatic reenrollment is initiated. This feature is not enabled by default. To enable the feature on the router, include the auto-re-enrollment statement at the [edit security pki] hierarchy level. [J-series Services Router Advanced WAN Access Configuration Guide; JUNOS Feature Guide]