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Configure LTE Mini-PIM

 

You can configure the LTE Mini-PIM as a primary interface, as a backup interface or as a dial-on-demand interface.

Configure LTE Mini-PIM as a Primary Interface

The LTE Mini-PIM is installed on a SRX320 line of devices and functions as the primary interface as seen in Figure 1 and assumed that the LTE Mini-PIM is installed in slot 1 on the SRX320 line of devices.

Figure 1: LTE Mini-PIM as a Primary Interface
LTE
Mini-PIM as a Primary Interface

Before you begin, ensure that dl0.0 is not configured as a backup interface. If dl0.0 is configured as a backup for any interface on the SRX Series device, then this configuration overrides the configuration outlined in this procedure, and the LTE Mini-PIM will function as a backup interface.

Use the show interfaces | display set | match backup-option | match dl0.0 command to check whether any interface uses dl0.0 as a backup interface. If dl0.0 is configured as a backup interface, then delete the configuration by issuing the following command:

delete interfaces interface-name unit 0 backup-options interface dl0.0

To configure the LTE Mini-PIM as a primary interface:

  1. Configure the dialer interface.
    user@host# set interfaces dl0 unit 0 family inet negotiate-address
    user@host# set interfaces dl0 unit 0 family inet6 negotiate-address
    user@host# set interfaces dl0 unit 0 dialer-options pool dialer-pool-number
    user@host# set interfaces dl0 unit 0 dialer-options dial-string dial-number
    user@host# set interfaces dl0 unit 0 dialer-options always-on
  2. Configure the dialer pool for the LTE Mini-PIM physical interface.
    user@host# set interfaces cl-1/0/0 dialer-options pool number
  3. Configure the profile for the Subscriber Identity Module (SIM) cards.
    user@host# run request modem wireless create-profile profile-id profile-id cl-1/0/0 slot sim-slot-number access-point-name apn-name authentication-method none

    sim-slot-number is the slot on the Mini-PIM in which the SIM card is inserted.

  4. Verify that the profile is configured successfully.
    user@host# run show modem wireless profiles cl-1/0/0 slot 1
  5. Activate the SIM card.
    user@host# set interfaces cl-1/0/0 act-sim sim-slot-number
  6. Select the profile and configure the radio access type for the SIM card.
    user@host# set interfaces cl-1/0/0 cellular-options sim sim-slot-number select-profile profile-id profile-id
    user@host# set interfaces cl-1/0/0 cellular-options sim sim-slot-number radio-access automatic

    If a SIM card is installed in the second slot, then select the profile and configure the radio access type for the secondary SIM card.

  7. Verify the status of the wireless network and dialer interface.
    user@host# run show modem wireless network
    user@host# run show interfaces dl0.0

    If the LTE Mini-PIM gets an IP address with a mask of /32 from the service provider, you can configure the default gateway information using the set interfaces cl-interface cellular-options sim sim-slot gateway ip-address/mask command to make the Mini-PIM accept the assigned IP address.

Configure LTE Mini-PIM in a High Availability Cluster Mode

An SRX chassis cluster supports two cl interfaces, cl-1/1/0 (primary node) and cl-8/1/0 (secondary node).

To configure the LTE Mini-PIM in a HA cluster mode:

  1. Configure the dialer interface (dl0).
    {primary:node0}[edit]
    user@host# set interfaces dl0 unit 0 family inet negotiate-address
    user@host# set interfaces dl0 unit 0 family inet6 negotiate-address
    user@host# set interfaces dl0 unit 0 dialer-options pool dialer-pool-number
    user@host# set interfaces dl0 unit 0 dialer-options dial-string dial-number
    user@host# set interfaces dl0 unit 0 dialer-options always-on
  2. Configure the LTE interface (cl-1/1/0) on the primary node.
    1. Configure the dialer pool for the LTE physical interface.

    2. Specify the priority for the interface. The interface with the higher priority becomes the active interface.

    3. Configure the profile for the SIM cards.

    4. Verify that the profile is configured successfully.

    5. Activate the SIM card.

    6. Select the profile and configure the radio access type for the SIM card.

  3. Repeat Step 2 to configure the LTE interface (cl-8/1/0) for the secondary node.

    If you assign the same priority to both interfaces, then the interface that is listed first in the configuration becomes the active interface.

    Verify the active interface:

  4. Verify the status of the wireless network and dialer interface.

    By default, the time interval taken to switch to the secondary cl interface when the active cl interface times out is 120 seconds. You can change the time interval by configuring the redial-delay option.

  5. Verify that the profile is configured successfully.
    user@host# run show modem wireless profiles cl-1/0/0 slot 1
  6. Verify the status of the wireless network and dialer interface.
    user@host# run show modem wireless network
    user@host# run show interfaces dl0.0

Configure LTE Mini-PIM as a Backup Interface

You can configure the LTE Mini-PIM as a backup interface. If the primary interface fails, the LTE Mini-PIM connects to the network and remains online only until the primary interface becomes functional. The dialer interface is enabled only when the primary interface fails. LTE Mini-PIM installed on SRX320 and functions as a backup interface as shown in Figure 2. The ge-0/0/1 port is connected to the internet and functions as the primary interface. In this scenario, the Mini-PIM is installed on slot 1.

Figure 2: LTE Mini-PIM as a Backup Interface
LTE
Mini-PIM as a Backup Interface

To configure the LTE Mini-PIM as a backup interface:

  1. Configure the dialer interface.
    user@host# set interfaces dl0 unit 0 family inet negotiate-address
    user@host# set interfaces dl0 unit 0 family inet6 negotiate-address
    user@host# set interfaces dl0 unit 0 dialer-options pool dialer-pool-number
    user@host# set interfaces dl0 unit 0 dialer-options dial-string dial-number
  2. Configure the dialer pool for the LTE Mini-PIM physical interface.
    user@host# set interfaces cl-1/0/0 dialer-options pool dialer-pool-number
  3. Configure the profile for the SIM cards.

    sim-slot-number is the slot on the Mini-PIM in which the SIM card is inserted.

    user@host# run request modem wireless create-profile profile-id profile-id cl-1/0/0 slot sim-slot-number access-point-name l3vpn.corp authentication-method none
  4. Verify that the profile is configured successfully.
    user@host# run show modem wireless profiles cl-1/0/0 slot 1
  5. Activate the SIM card.
    user@host# set interfaces cl-1/0/0 act-sim sim-slot-number
  6. Select the profile and configure the radio access type for the SIM card.
    user@host# set interfaces cl-1/0/0 cellular-options sim sim-slot-number select-profile profile-id profile-id
    user@host# set interfaces cl-1/0/0 cellular-options sim sim-slot-number radio-access automatic
  7. Configure the Ethernet interface as the primary interface, which connects to the wireless network. Configure the dl0 interface as the backup interface.
    user@host# set interfaces ge-0/0/1 unit 0 family inet address 192.168.2.1/24
    user@host# set interfaces ge-0/0/1 unit 0 backup-options interface dl0.0
  8. Verify the status of the wireless network and dialer interface.
    user@host# run show modem wireless network
    user@host# run show interfaces dl0.0

You can use the activation-delay and deactivation-delay command-line options to avoid interface flaps. Avoid the Interface flaps by forcing a delay between the time the primary interface changes states, and the time the dialer interface is enabled or disabled. The activation delay controls the time between the primary interface going down and activation of the dialer interface. Similarly, the deactivation delay controls the time between the recovery of the primary interface and deactivation of the backup interface.

Configure LTE Mini-PIM as a Dial-on-demand Interface

When you configure the LTE interface as a primary interface, it functions either in always-on or in dial-on-demand mode. In always-on mode, the interface remains connected to the network whereas in dial-on-demand mode, the connection is established only when needed.

In dial-on-demand mode, you can enable the dialer interface only when network traffic configured as an “interesting traffic” arrives on the network. Interesting traffic triggers or activates the wireless WAN connection. You define an interesting packet by using the dialer filter. To configure dial-on-demand by using a dialer filter, you first configure the dialer filter and then apply the filter to the dialer interface. Once the traffic is sent over the network, an inactivity timer is triggered and the connection is closed after the timer expires. The dial-on-demand mode is supported only if the LTE Mini-PIM is configured as a primary interface.

The LTE Mini-PIM installed on an SRX320 functions as the primary interface as show in Figure 3 and assumed that the LTE Mini-PIM is installed in slot 1 on the device.

Figure 3: LTE Mini-PIM as a Dial-on-Demand Interface
LTE Mini-PIM as a Dial-on-Demand Interface

To configure the LTE Mini-PIM as a dial-on-demand interface:

  1. Configure the dialer interface.
    user@host# set interfaces dl0 unit 0 family inet negotiate-address
    user@host# set interfaces dl0 unit 0 family inet6 negotiate-address
    user@host# set interfaces dl0 unit 0 family inet filter dialer dialer-filter-name
    user@host# set interfaces dl0 unit 0 dialer-options pool dialer-pool-number
    user@host# set interfaces dl0 unit 0 dialer-options dial-string dial-number

    Optionally, you can configure the idle-timeout value, to determine the duration of the enabled connection in the absence of interesting traffic.

    user@host# set interfaces dl0 unit 0 dialer-options idle-timeout idle-timeout-value
  2. Configure the dialer pool for the LTE Mini-PIM physical interface.
    user@host# set interfaces cl-1/0/0 dialer-options pool number
  3. Create the dialer filter rule.
    user@host# set firewall family inet dialer-filter dialer-filter-name term term1 from destination-address ip-address then note
  4. Set the default route.
    set routing-options static route ip-address next-hop dl0.0
  5. Configure the profile for the SIM cards.
    user@host# run request modem wireless create-profile profile-id profile-id cl-1/0/0 slot sim-slot-number access-point-name apn-name authentication-method none
  6. Verify that the profile is configured successfully.
    user@host# run show modem wireless profiles cl-1/0/0 slot 1
  7. Activate the SIM card.
    user@host# set interfaces cl-1/0/0 act-sim sim-slot-number
  8. Select the profile and configure the radio access type for the SIM card.
    user@host# set interfaces cl-1/0/0 cellular-options sim sim-slot-number select-profile profile-id profile-id
    user@host# set interfaces cl-1/0/0 cellular-options sim sim-slot-number radio-access automatic
  9. Verify the configuration by sending traffic to the destination address. The traffic is routed to the dl0 interface and if it matches the dialer filter rule, then the dl0 is triggered to dial.
  10. Verify the status of the wireless network and dialer interface.
    user@host# run show modem wireless network
    user@host# run show interfaces dl0.0