H3C S3610-28F, Operation Manual

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Operation Manual – BFD-GR
H3C S3610&S5510 Series Ethernet Switches
Chapter 2 GR
2-3
As illustrated in Figure 2-1 , Router A works as GR Restarter, Router B, Router C and
Router D are the GR Helpers of Router A. A GR session is established between the GR
Restarter and the GR Helper.
2) GR Restarter restarting
Figure 2-2 Restarting process for the GR Restarter
As illustrated in Figure 2-2 . 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.
3) GR Restarter signaling to GR Helper
Figure 2-3 The GR Restarter signals to the GR Helper(s) after restart