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Licensing Requirements and Limitations for NSR
Involved Network Elements
Other network elements are not required.
Licensing Requirements
NSR is a basic feature of a switch and is not under license control.
Feature Support in V200R019C10
All models of S9300 and S9300X series switches support NSR.
For details about software mappings, visit Hardware Query Tool and search for the desired product model.
Feature Limitations
NSR has the following limitations:
- The switchover time is not strictly controlled, because the switchover time is not the key performance index after the active/standby switchover of MPUs.
- NSR cannot ensure high reliability of the system that has only one MPU.
- If a fault occurs in the main process before the batch backup is complete, the slave process, whose status is unknown and is not switchable, cannot function as the main process.
- The system enabled with NSR does not support system-level GR or ISSU.
- On the device that performs the active/standby switchover of MPUs, the system supports two HA protection mechanisms: NSR and GR. NSR and GR cannot be used simultaneously. That is, during the active/standby switchover of MPUs, the system can use either NSR or GR for a specific protocol. When being deployed with NSR, a device can keep its neighbor relationship so that the device can help its neighbor complete GR. This ensures HA of services on all nodes of a network to maximum extent.