Intel ZT8101 ユーザーズマニュアル

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The purpose of a router port is to enable UDP multicast packets and IGMP multicast group 
membership messages to reach multiple ports of a multi-port router. Routers do not implement 
IGMP snooping or transmit/forward IGMP report packets. Thus, forwarding all IP UDP multicast 
packets to a static router port on the ZT8101 switch guarantees that all ports of a multi-port router, 
which are attached to the switch, can reach all multicast group members through the attached 
router’s other ports.

A router port interacts with multicast packets in these ways:

•

All IGMP report packets will be forwarded to the router port.

•

IGMP queries (from the router port) will be flooded to all ports.

•

All UDP multicast packets will be forwarded to the router port. Because routers do not send 
IGMP reports or implement IGMP snooping, a multi-port router connected to the router port 
of the Layer 3 switch would not be able to receive UDP data streams from its ports unless the 
UDP multicast packets were all forwarded to the router port.

A router port will be dynamically configured when IGMP query packets, RIPv2 multicast, 
DVMRP multicast, PIM-DM multicast packets are detected flowing into a port.

1. From the Main Menu, select Layer 3 - IP Networking Setup | Static Router Port Settings 

and press Enter.

2. Toggle the Action field to Add/Modify and configure these fields.

3. Highlight APPLY and press Enter.

4. To delete an entry, toggle the Action field to Delete and enter the VLAN name of the VLAN 

for which the router port table entry is to be deleted. Highlight APPLY and press Enter. 

VLAN Name

Specifies the name of the VLAN the static router port resides on.

Router Port

Specifies the ports that you want to set up as static router ports. Each port 
can be set individually as a router port by highlighting the port’s entry using 
the Arrow keys. Use the spacebar to toggle between M (member) and - 
(non-member).