As shown in Figure 1-1, SW1, LSW2, LSW31, and LSW4 are S5700s. They are enabled with VRRP and RSTP and fully meshed. After all interfaces transparently transmit packets from the same VLAN; the endpoint device LSW4 connects to terminals, and the VRRP virtual IP address is used as the gateway address. When uplink interface GE0/0/2 on LSW4 is shut down, packet forwarding is normal and few packets are discarded. When the interface is restored, multiple packets are discarded due to the ping to the gateway fails.
Figure 1-1 S5700s are enabled with VRRP and RSTP. When the uplink interface of the endpoint device goes Down and then Up. Packets are discarded due to the ping to the gateway fails.