User manual
VLAN Configuration of Single Ring:
1. It must configure a Console port for the device. Console port and CPU port must be in the same VLAN,
and Port 1 in following figure is Console port.
2. Port type of ring port must be Trunk and Tagged. As shown in Figure6.4.6 and 6.4.7;
（
Figure 6.4.6
）
（
Figure 6.4.7
）
：
1. Maximum VLAN items of IES7110-3GS series switch is 64, VID’s value range is 1~4094. Console port
refers to the port to manage and configure switch. CPU port and console port must be in the same VLAN.
2. Propose to configure one or more port used as console port which and CPU port must be in the same
VLAN. To separate console port from CPU port can prevent that CPU send managed data packets to each
port to influence the communication.
3. After configuring VLAN, it is needed to save this configuration, and reboot the switch.
6.4.2 IGMP snooping
IP host applies to join (or leave) multicast group to the neighboring router through IGMP (Internet Group
Management Protocol) protocol. IGMP Snooping is multicast constraining mechanism. It manages and controls
multicast group by snooping and analysis of the IGMP messages between the host and the multicast device.
Work process of IGMP Snooping: the switch snoops messages between the host computer and the router
and tracks multicast information and the port applied for. When the switch snoops IGMP Report message sent
from the host computer to the router, the switch would add this port to multicast forwarding list; when the switch
snoops IGMP Leave message sent by the host computer, the router will send Group-Specific Query message of
this port. If other hosts need this multicast, then the rely IGMP Report message. If the router doesn't get any reply
from the hosts, the switch would delete this port from the multicast forwarding list. The router will send IGMP
Query message regularly, the switch will deletes the port from the multicast forwarding list if it doesn't get the
IGMP Report message from the host.
IGMP Snooping:
Enable or disable IGMP snooping function
IGMP Query:
Enable or disable IGMP query function
IGMP Query Interval:
after enabling IGMP Query, the interval to check existing multicast members.
MAX Age:
the maximum existing time of the members