H3C S9500E Series Configuration Manual page 168

Restarting GR Restarter
Figure 39 Protocol restarting process for the GR Restarter
Router A
Router B
GR helper
As illustrated in Figure 39, the GR Helper detects that the GR Restarter has restarted its routing
protocol and assumes that it will recover within the GR Time. Before the GR Time expires, the GR
Helper will neither terminate the session with the GR Restarter nor delete the topology or routing
information of the latter.
Signaling to GR Helper
Figure 40 The GR Restarter signals to the GR Helper(s) after protocol restart
Router D
GR helper
GR restarter
Router C
GR helper
GR session
The administrator restarts GR Restarter
or GR Restarter is operating abnormally
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