Static Router Ports - D-Link DES-6500 User Manual

D-Link DES-6500 Layer 3 Stackable Gigabit Ethernet Switch
Leave Timer
Querier State
State

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, 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 page, as shown below.
The Current Static Router Ports Entries page (shown above) displays all of the current
entries to the Switch's static router port table. To add or modify an entry, click the Modify
button. This will open the Static Router Ports Settings page, as shown below.
This specifies the maximum amount of time in seconds between the
Switch receiving a leave group message from a host, and the Switch
issuing a group membership query. If no response to the membership
query is received before the Leave Timer expires, the (multicast)
forwarding entry for that host is deleted.
Choose Querier to enable transmitting IGMP Query packets or Non-
Querier to disable. The default value is Non-Querier.
Select Enabled to implement IGMP Snooping. This is Disabled by
default.
Figure 4- 8. Current Static Router Ports Entries window
32