![Huawei Quidway NetEngine40E Скачать руководство пользователя страница 476](http://html.mh-extra.com/html/huawei/quidway-netengine40e/quidway-netengine40e_configuration-manual-reliability_169453476.webp)
Feature
Advantage
Disadvantage
NSR
l
When the control plane becomes
faulty, the forwarding plane can
still provide forwarding services.
l
During the active/standby
switchover of main control boards,
the route processing is not
interrupted because of the
following factors:
–
No neighbor or topology
information is lost.
–
No neighbor relationship goes
Down.
l
The active/standby switchover of
main control boards is relevant to
only the local device.
–
The active/standby switchover
of main control boards on the
local device does not depend on
or affect the remote device.
Therefore, the local device and
the remote device can
communicate properly.
–
The route convergence speed of
NSR is higher than that of NSF.
l
More bandwidths are required and
more system resources are
consumed.
NSR and GR
On the device that performs the active/standby switchover of main control boards, the system
supports two HA protection mechanisms: NSR and GR. NSR and GR are mutually exclusive.
That is, during the active/standby switchover of main control boards, the system can use either
NSR or GR for a specific protocol. When being deployed with NSR, a device can keep its
neighbor relationships so that the device can help its neighbor complete GR. This ensures the
HA of services on all nodes of a network to maximum extent.
7.1.2 NSR Features Supported by the NE80E/40E
This section lists the protocols that support NSR.
Currently, the protocols that support NSR are as follows:
l
ISIS
l
OSPF
l
OSPFv3
l
BGP
l
BGP4+
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
7 NSR Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
459