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xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
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Static Router Port 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 L2 Features > IGMP folder > Static Router Port Settings link to open the following page, as shown below.
Figure 7- 21. Static Router Ports Settings window
The previous window 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 Static Router Ports Settings window, as shown below.
Figure 7- 22. 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
Ports on the Switch that will have a multicast router attached to them.
Click Apply to implement the new settings, Click the Show All Static Router Port Entries link to return to the Static Router Port
Settings window.