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When the GR Helpers find that the GR Restarter fails, they maintain the adjacency with
the GR Restarter and retain the routing information related to the GR Restarter before the
GR time times out.
3.
After the SMB is started, the GR Restarter sends signals to the neighbors.
Figure 6-4
GR Restarter sending signals to the neighbors after the AMB/SMB switchover
RouterD
GR Helper
RouterA
GR Restarter
RouterB
GR Helper
GR Helper
RouterC
Signals sent to estabilish a GR Session
The SMB of the GR Restarter is restarted to sends signals to the GR Helpers, and re-
establish sessions.
4.
The GR Restarter obtains topology information from neighbors.
Figure 6-5
GR Restarter obtaining topology information from neighbors
GR restarter gets topology information
or routes from neighbors
RouterD
GR Helper
RouterA
GR Restarter
RouterB
GR Helper
GR Helper
RouterC
After the GR Restarter obtains the topology information from its neighbors, it recalculates
the routing table and triggers the aging of the old routes.
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
6 GR Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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