Product Manual
Product Manual
Product Manual
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DES-3526 / DES-3526DC Fast Ethernet Layer 2 Switch<br />
Route Timeout This is the maximum amount of time in seconds a route is kept in the forwarding table<br />
without receiving a membership report. Default = 260.<br />
Leave Timer This specifies the maximum amount of time in seconds between the Switch receiving<br />
a leave group message from a host, and the Switch issuing a group membership<br />
query. If no response to the membership query is received before the Leave Timer<br />
expires, the (multicast) forwarding entry for that host is deleted.<br />
Querier State Choose Enabled to enable transmitting IGMP Query packets or Disabled to disable.<br />
The default is Disabled.<br />
State Select Enabled to implement IGMP Snooping. This field is Disabled by default.<br />
Click Apply to implement the new settings. Click the Show All IGMP Group Entries link to return to<br />
the Current IGMP Snooping Group Entries window.<br />
Static Router Ports Entry<br />
A static router port is a port that has a multicast router attached to it. Generally, this router would have<br />
a connection to a WAN or to the Internet. Establishing a router port will allow multicast packets<br />
coming from the router to be propagated through the network, as well as allowing multicast messages<br />
(IGMP) coming from the network to be propagated to the router.<br />
A router port has the following behavior:<br />
• All IGMP Report packets will be forwarded to the router port.<br />
• IGMP queries (from the router port) will be flooded to all ports.<br />
• All UDP multicast packets will be forwarded to the router port. Because routers do not send IGMP reports or<br />
implement IGMP snooping, a multicast router connected to the router port of a Layer 3 switch would not be able<br />
to receive UDP data streams unless the UDP multicast packets were all forwarded to the router port.<br />
A router port will be dynamically configured when IGMP query packets, RIPv2 multicast, DVMRP<br />
multicast or PIM-DM multicast packets are detected flowing into a port.<br />
Open the IGMP folder and the click on the Static Router Ports Entry link to open the Current<br />
Static Router Ports Entries page, as shown below.<br />
Figure 6- 16. Current Static Router Ports Entries window<br />
The Current Static Router Ports Entries window displays all of the current entries to the Switch's<br />
static router port table. To modify an entry, click the Modify button. This will open the Static Router<br />
Ports Settings window, as shown below.<br />
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