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    Network Services Mode Overview

    A network services mode defines how the router chassis recognizes and uses certain modules. You can configure network services modes on MX Series 3D Universal Edge Routers and on T4000 Core Routers with Type 5 FPCs.

    On MX Series 3D Universal Edge Routers, you can configure IP Network Services mode, Enhanced IP Network Services mode, Ethernet Network Services mode, or Enhanced Ethernet Network Services mode.

    You can use either Enhanced IP Network Services mode or Enhanced Ethernet Network Services mode to improve the scaling and performance specific to filters in a subscriber access network that uses statically configured subscriber interfaces. For more information about using enhanced network services modes with firewall filters, see Firewall Filters and Enhanced Network Services Mode Overview.

    On MX240, MX480, and MX960 routers, the MPC5E and MPC7E line cards power on only if the configured network services mode is enhanced-ip or enhanced-ethernet. All other MPCs work with any of the network services modes. MX2010 and MX2020 support only enhanced-ip and enhanced-ethernet network services modes.

    Note: You cannot configure the Ethernet Network Services mode or Enhanced Ethernet Network Services mode if the MPCs installed on the router are of the type -IR-B or -R-B.

    Note: If Dense Port Concentrators (DPCs) in Ethernet Network Services mode or Enhanced Ethernet Network Services mode are up and running, you cannot configure the system for IP Network Services mode. You must first disable any Ethernet Network Services mode DPCs before switching to IP Network Services mode.

    Note: Starting from Junos OS Release 13.3, you can configure the Enhanced IP Network Services mode and Enhanced Ethernet Network Services mode on MX240, MX480 and MX960 routers with an SCBE2. Specify the enhanced-ip option or the enhanced-ethernet option at the [edit chassis network-services] hierarchy level.

    You can configure T4000 Core Routers with Type 5 FPCs to run in Enhanced Network Services mode to enable improved virtual private LAN service (VPLS) MAC address learning. For more information, see enhanced-mode.

    Table 1 explains how different modules function when the MX Series 3D Universal Edge router chassis is configured to run in different network services modes.

    Table 1: Network Services Mode Functions

    Configuration Upon Boot or Configuration Change

    Module Function

    IP Network Services mode (default; upon boot)

    All modules except DPCE-X and DPCE-X-Q are powered on.

    Starting with Junos OS Release 14.1, a router with Enhanced Ethernet Services DPCs (DPCE-X) and Enhanced Queuing Ethernet Services DPCs (DPCE-X-Q) modules is powered on by default. If you do not configure a services mode on DPCE-X or DPCE-X-Q modules, the IP Network Services mode becomes the default network services mode. Until Junos OS Release 13.3, all modules except DPCE-X and DPCE-X-Q modules are powered on, and DPCE-X or DPCE-X-Q modules are powered off by default.

    Starting with Junos OS Release 15.1, you can limit the maximum number of logical interfaces on MX Series routers with MS-DPCs to 64,000 for enhanced IP network services mode. To do this, include the limited-ifl-scaling option with the network-services enhanced-ip statement at the [edit chassis] hierarchy level. Using the limited-ifl-scaling option prevents any collision of logical interface indices that can occur in a scenario in which you enable the Enhanced IP Network Services mode on the router which also contains an MS-DPC.

    Ethernet Network Services mode (upon boot)

    All modules are powered on. However, operating in Ethernet Network Services mode restricts certain BGP protocol functions and does not support Layer 3 VPN, unicast RPF, and source and destination class usage (SCU and DCU) functions. In addition, the number of externally configured filter terms is restricted to 64K.

    Ethernet Network Services mode provides support for only Layer 2.5 functions.

    Enhanced IP Network Services mode (upon boot)

    Only MPCs, MS-MPCs, and MS-DPCs are powered on.

    Note: Only Multiservices DPCs (MS-DPCs) and MS-MPCs are powered on with the enhanced network services mode options. No other DPCs function with the enhanced network services mode options.

    Enhanced Ethernet Network Services mode (upon boot)

    Only MPCs, MS-MPCs, and MS-DPCs are powered on. All restrictions for operating in Ethernet Network Services mode apply.

    Note: Only Multiservices DPCs (MS-DPCs) and MS-MPCs are powered on with the enhanced network services mode options. No other DPCs function with the enhanced network services mode options.

    Change from IP Network Services mode to Ethernet Network Services mode

    DPCE-X and DPCE-X-Q modules are powered on. No reboot is required. No impact to MPCs or MS-DPCs.

    Change from Ethernet Network Services mode to IP Network Services mode

    Invalid modification. No commit occurs. A warning message indicates if any FPCs (along with their slot location) must be offline before switching to other network services. No impact to MPCs or MS-DPCs.

    Change from Enhanced IP Network Services mode to Enhanced Ethernet Network Services mode

    No reboot is required. No impact to MPCs or MS-DPCs.

    Change from IP Network Services mode to Enhanced IP Network Services mode

    System reboot is required (PFE/FPCs)

    Change from Ethernet Network Services mode to Enhanced Ethernet Network Services mode

    Reboot is required.

    For details on the Layer 2.5 support for Ethernet Network Services mode, see Restrictions on Junos OS Ethernet Network Services Mode and Enhanced Ethernet Network Services Mode Features for MX Series Routers.

    Network Services on SCBE2

    The following scenarios are to be noted when you use an MX Series router with an SCBE2:

    • You must configure the set chassis network-services (enhanced-ip | enhanced-ethernet) configuration command and reboot the router to bring up the FPCs on the router. However, after the router reboots, the MS DPC, the MX FPC, and the ADPC are powered off.
    • All the FPCs and DPCs in the router are powered off when you reboot the router without configuring either the enhanced-ip option or the enhanced-ethernet option at the [edit chassis network-services] hierarchy level.
    • You must reboot the router when you configure or delete the enhanced-ip option or the enhanced-ethernet option at the [edit chassis network-services] hierarchy level. The following warning message, which prompts you to reboot the router, is displayed when you configure or delete the enhanced-ip or the enhanced-ethernet configuration statement at the [edit chassis network-services] hierarchy level.
      'chassis'
      WARNING: Chassis configuration for network services has been changed. A
      system reboot is mandatory. Please reboot the system NOW. Continuing without
      a reboot might result in unexpected system behavior.
      commit complete
    • Starting with Junos OS Release 14.2, you must perform a commit synchronization of the settings between dual Routing Engines under some specific conditions. If you configure or remove the enhanced-ip or the enhanced-ethernet option at the [edit chassis network-services] hierarchy level on one of the Routing Engines on a router that contains dual Routing Engines, perform commit synchronization of the settings between the two Routing Engines by entering the commit synchronize command at the [edit system] hierarchy level. In addition, you must reboot all of the Routing Engines on the router when the enhanced IP network services mode is changed. The reboot is performed to prevent any unexpected system behavior.

    Note: Dynamic multicast replication mode is supported on SCBE2. Static multicast replication mode is not supported on SCBE2.

    Note: If a route’s next hop is a unicast next hop through integrated routing and bridging (IRB) and the corresponding MAC address is learned over a label-switched interface (LSI), the IRB derives the Layer 2 information from the indirect next hop for the LSI. If you configure the load-balance per-packet policy statement, the indirect next hop of the LSI points to a unilist, which has all the member links to load balance the packets toward the MPLS cloud. You should configure the enhanced-ip option to enable the unicast next hop for IRB to use the unilist as the Layer 2 forwards next hop and load balance the packets.

    Release History Table

    Release
    Description
    Starting with Junos OS Release 15.1, you can limit the maximum number of logical interfaces on MX Series routers with MS-DPCs to 64,000 for enhanced IP network services mode.
    Starting with Junos OS Release 14.2, you must perform a commit synchronization of the settings between dual Routing Engines under some specific conditions.
    Starting with Junos OS Release 14.1, a router with Enhanced Ethernet Services DPCs (DPCE-X) and Enhanced Queuing Ethernet Services DPCs (DPCE-X-Q) modules is powered on by default.
    Starting from Junos OS Release 13.3, you can configure the Enhanced IP Network Services mode and Enhanced Ethernet Network Services mode on MX240, MX480 and MX960 routers with an SCBE2.
    Until Junos OS Release 13.3, all modules except DPCE-X and DPCE-X-Q modules are powered on, and DPCE-X or DPCE-X-Q modules are powered off by default.

    Modified: 2017-06-19