Huawei NetEngine80E Configuration Manual - Reliability page 458

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
Figure 6-1 Basic mechanism of HSB
Negotiation to support
When the system is restarted, the AMB backs up its static configurations on the SMB and the
SMB re-execute the static configurations.
When the system runs normally, any data changes in the AMB, including static and dynamic
data changes, are backed up to the SMB. Note that the AMB can download the routing
information from the data plane to the interface board but the SMB cannot download the routing
information. In addition, the SMB cannot receive any information from the interface board.
After the switchover, the SMB switches itself to the AMB and runs smoothly. All data on the
AMB is backed up; therefore, the sessions with other routers are not affected and other routers
are not aware of the switchover. That is, the HSB switchover is "self-contained".
The requirements for the hardware and software to implement the HSB are as follows:
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The HSB performs the following functions:
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Issue 02 (2014-09-30)
GR Capabiliby
Passive GR
RPA MPLS
RIB
FIB
Download
FIB
IPC
IPC
IO board FIB
Interface
Incoming Packet
Supporting two main boards that serve as the backup for each other
Providing a physical communication channel between the AMB and the SMB
Supporting AMB heart beat detection on hardware or software
Supporting backup of static configuration data from the AMB to the SMB
Supporting dynamic backup and update of protocol status data from the AMB to the SMB
Supporting the protocol-level GR capability
Supporting data smoothing between modules
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Routing / MPLS Protocol
AMB
State Sync
Socket /TCP Link
Synchronize
IFnet
configuration
and change
Heart Beat Check
Switch Fabric
FIB
Outcoming Packet
6 GR Configuration
SMB
RPA MPLS
RIB
IFnet
FIB
IPC
FIB
FIB
IPC
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