Avaya 3.7 - page 208

Using advanced features
208 Avaya VPNmanager Configuration Guide Release 3.7
Figure 63: VSU Tunnel Persistence
Figure 64, illustrates tunnel persistence between SGs and remote users (RUser). The addition
of SGD to VPN2 (SGA, SGC, SGD, and Remote User) interrupts tunnel persistence in VPN2,
thus breaking the remote connection. Once the configuration update is complete, the remote
connection will be restored. Because modifications have not been made in VPN1 (SGA and
SGB) and VPN3 (SGB and SGD), tunnels remain persistent.
Figure 64: Remote User Tunnel Persistence