IES-1000 User’s Guide

The following table describes this screen.

 

 

Table 10-11 Bridge MAC Address Record

 

 

 

 

 

LABEL

DESCRIPTION

 

 

 

 

 

 

Bridge Setup

Click this link to go to the Bridge Setup screen.

 

 

 

 

 

 

Setup Aging

Enter a time from 10 to 1,000,000 seconds. This is how long all dynamically learned MAC

 

 

Time

addresses remain in the MAC address table before they age out (and must be relearned).

 

 

 

 

 

 

Port

Select a port from and click Refresh to display that port’s MAC address listings.

 

 

 

 

 

 

Refresh

Click this button to update the MAC address listings.

 

 

 

 

 

 

Flush

Click this button to clear the MAC address listings for the specific port.

 

 

 

 

 

 

FlushAll

Click this button to clear the MAC address listings for all of the ports.

 

 

 

 

 

10.5.6IGMP Snooping

Traditionally, IP packets are transmitted in one of either two ways - Unicast (one sender to one recipient) or Broadcast (one sender to everybody on the network). Multicast delivers IP packets to just a group of hosts on the network.

IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish membership in a multicast group - it is not used to carry user data. Refer to RFC 1112 and RFC 2236 for information on IGMP versions 1 and 2 respectively.

A layer-2 switch can passively snoop on IGMP Query, Report and Leave (IGMP version 2) packets transferred between IP multicast routers/switches and IP multicast hosts to learn the IP multicast group membership. It checks IGMP packets passing through it, picks out the group registration information, and configures multicasting accordingly.

Without IGMP snooping, multicast traffic is treated in the same manner as broadcast traffic, that is, it is forwarded to all ports. With IGMP snooping, group multicast traffic is only forwarded to ports that are members of that group. IGMP Snooping generates no additional network traffic, allowing you to significantly reduce multicast traffic passing through your switch.

10.5.7IGMP Snooping Record Screen

Click IGMP Snooping Record in the Bridge Setup screen to open this screen.

Getting Started Screens

10-13