DGS-3312SR Stackable Gigabit Layer 3 Switch
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Static Router Ports
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 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, and PIM-
DM multicast packets are detected flowing into a port.
Open the
IGMP
folder and the click on the
Static Router Ports Entry
link to open the
Current Static Router Ports
Entries
window, as shown below.
Figure 4- 30. Current Static Router Port Entries window
The 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 4- 31. Static Router Ports Settings window
To configure a static router port(s):
1. Select the Unit containing the static router port.
2. Select the Port or Ports that will become static router ports.
3. Click
Apply
to let the changes take effect.
The following parameters are listed in the
Static Router Port
windows.
Parameter
Description
VLAN ID (VID)
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.
Unit
This is the Unit ID of the Switch in a Switch stack for which you are creating an entry into
the Switch’s static router port table.
Member Ports
There are the ports on the Switch that will have a multicast router attached to them.
