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Static Router Ports Settings
A static router port is a port that has a multicast router attached to it. Generally, this router would have a
connection to a WAN or to the Internet. Establishing a router port will allow multicast packets coming from the
router to be propagated through the network, as well as allowing multicast messages (IGMP) coming from the
network to be propagated to the router.
A router port has the following behavior:
• 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 multicast router connected to the router port of a Layer 3
switch would not be able to receive UDP data streams 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 or PIM-DM
multicast packets are detected flowing into a port.
Open the IGMP Snooping folder and the click on the Static Router Ports Settings link to open the Static Router
Port Settings window, as shown below.
Figure 7- 12. Static Router Ports Settings window
The Static Router Ports Settings page (shown above) displays all of the current entries to the Switch's static router
port table. To modify an entry, click the Modify button. This will open the following window:
Figure 7- 13. Static Router Ports Settings - Edit window
The following parameters can be set:
Parameter Description
VID (VLAN ID) This is the VLAN ID that, along with the VLAN Name, identifies the VLAN where the
multicast router is attached.
VLAN Name This is the name of the VLAN where the multicast router is attached.
Member Ports These are the ports on the Switch that will have a multicast router attached to them.