3Com S7906E Configuration Manual page 2275

Figure 1-2 Restarting process for the GR Restarter
As illustrated in Figure
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) Signaling to GR Helper
Figure 1-3 The GR Restarter signals to the GR Helper(s) after restart
As illustrated in Figure 1-3, after the GR Restarter has recovered, it will signal to all its neighbors and
reestablish GR Session.
4) Obtaining topology and routing information
1-2. The GR Helper detects that the GR Restarter has restarted its routing
1-3