Example for Configuring Interface Backup Between 3G Interfaces

Created: Dec 17, 2016 23:19:58Latest reply: Dec 18, 2016 00:02:14 971 1 0 0

Example for Configuring Interface Backup Between 3G Interfaces


Applicability

This example applies to V200R001C01 and later versions, and routers supporting 3G cellular interfaces.


Networking Requirements

RouterA connects to a 3G network. It uses Cellular0/0/0 as the primary interface and Cellular0/0/1 as the backup interface to transmit data on the 3G network.

Figure 1  Backup between cellular interfaces
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Procedure

  1. Configure RouterA.

  2. Verify the configuration.

    Run the display ip interface brief command to check the status of the Cellular interfaces. Cellular0/0/0 is in Up state and has obtained an IP address through negotiation. Cellular0/0/1 is in Down state and its IP address field displays unassigned. When RouterA pings the gateway address, the number of received packets on Cellular0/0/0 increases.

    When Cellular0/0/0 is shut down, Cellular0/0/1 goes to Up state and obtains an IP address. When RouterA pings the gateway address, the number of received packets on Cellular0/0/1 increases.


Configuration Notes

  • To use the cellular interfaces on an AR router, install a 3G USB data card on the router. AR series routers support two 3G USB data cards. In V200R002C00 and later versions, cellular interfaces are not displayed if no 3G USB data card is installed.
  • A 3G USB data card supports WCDMA and CDMA2000 modes.
  • Cellular interfaces support only circular DCC.
  • The primary and backup interfaces must have reachable routes to the destination network segment.
  • It takes some time for a cellular interface to dial to the 3G interface. Therefore, some data packets may be lost during an active/standby switchover.
  • When the 3G USB data card works in WCDMA mode, determine whether to configure a parameter profile based on the 3G network requirements:

    • If the 3G network does not require access point name (APN) authentication, you do not need to configure a parameter profile.
    • If the cellular interfaces need to use dynamic APNs, run the profile create profile-number dynamic command in the interface view.
    • If the cellular interfaces need to use static APNs, run the profile create profile-number static apn-name command in the interface view.

  • x
  • convention:

user_2790689     Created Dec 18, 2016 00:02:14 Helpful(0) Helpful(0)

Good example
  • x
  • convention:

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