4.11 Mirror

Port mirror is used to mirror traffic from source port to a target port for analysis. Only 2 ports can be monitored (mirrored) simultaneously to 1 sniffer port (target port). (Note that the target port must be in the same VLAN as the source port).

1.Click “Active” radio button to activate port mirror.

2.Select ‘Monitored Ports’ (up to 2 ports).

3.Click ‘Sniffer Port’ combo box and select a sniffer port (target port) and click “Apply” to apply.

4.This figure describes port 2 and port 3 will be mirrored to port 11.

4.12 IGMP Snooping

Multicasting is widely used to support multi-media applications such as video conferencing. The multicasting simply broadcasts its services to the group of a network instead of establishing connections separately with every host that subscribed the services. With no Multicast Filtering-aware switches, a multicast server may floods broadcast-data overall the broadcast domain and wastes a lot of bandwidth.

The Internet Group Management Protocol (IGMP) snooping uses the protocol to make switches join/leave multicast group and interacts switches to optimize the network performance by monitoring the IGMP packets and forward to the ports containing multicast hosts or switches. This will efficiently reduce the multicast traffic rather than flooding overall network. IGMP snooping is more and more important especially when the multi-media demand is booming.

As IGMP Snooping only operates under 802.1Q VLAN mode, please ëNote change VLAN mode from Port Group VLAN to 802.1Q VLAN before

enabling IGMP Snooping.

4.13 Priority

This switch supports IEEE802.1p CoS with 2-level priority. There are 8 traffic classes and 8 Service Rules in the Priority Map. When one packet carries with priority-tag, which has specified a CoS (Class of Service) comes into the switch, the specified CoS tag will determine what priority (Low/High) will it get according to the Priority Map in the switch. The available Service Rules are:

FIFO

The first in packet, the first out packet (No priority)

1：1

Send 1 high priority packet, then 1 low priority packet

 

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