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CLI-based Configuration Guide - IP Unicast Routing

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R009

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As networks develop, the demand for data, audio, and video services is growing, which imposes increasing requirements on IP network reliability. If an AMB/SMB switchover is performed on a device due to a maintenance operation or a single point of failure, routes may fail to converge, which may result in traffic loss or even a network breakdown. Non-stop routing (NSR) can address this problem and ensure uninterrupted forwarding of key services.

With Routing Information Protocol next generation (IS-IS) NSR, IS-IS real-time data is synchronized between the AMB and SMB. After an AMB/SMB switchover is performed on a device, the SMB takes over services from the AMB, and neighbors are unaware of the local fault. After the switchover, the new AMB recovers IS-IS immediately based on the synchronized IS-IS real-time data. Therefore, neighbors are unaware of the switchover as well. IS-IS NSR requires synchronization of the following data:

  • All configuration data, such as information about neighbors, timer parameters, and process configurations.

  • Dynamic data, such as the interface parameters and state, and information about neighbors and the link state database (LSDB).

Only the AR3200 series support NSR.

Updated: 2019-12-27

Document ID: EDOC1000174069

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