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DES-3326 Layer 3 Fast Ethernet Switch User’s Guide
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
the 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, PIM-DM multicast packets are detected flowing into a port.
To setup a static router port:
Click the Static Router Port Settings link on the Multicasting menu:
Figure 7-40. Static Router Port Settings window
To delete an existing static router port configuration, click the Delete icon.
To add a static router port configuration, click the New icon:
Figure 7-41. Static Router Port Settings − Add window
The following fields can be set:
Parameter Description
VID
Allows the specification of the VLAN
ID (VID) of the VLAN the static router
port belongs to.
Port
Each port can be set individually as
a router port by clicking the port’s
click-box entry.
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