ES-2024A User’s Guide
58
Chapter 7 Basic Setting
In MTU (Multi-Tenant Unit) applications, VLAN is vital in providing isolation and security
among the subscribers. When properly configured, VLAN prevents one subscriber from
accessing the network resources of another on the same LAN, thus a user will not see the
printers and hard disks of another user in the same building.
VLAN also increases network performance by limiting broadcasts to a smaller and more
manageable logical broadcast domain. In traditional switched environments, all broadcast
packets go to each and every individual port. With VLAN, all broadcasts are confined to a
specific broadcast domain.
Note:
VLAN is unidirectional; it only governs outgoing traffic.
See
for information on port-based and 802.1Q tagged VLANs.
7.5 IGMP Snooping
A 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. IGMP snooping allows the
switch to learn multicast groups without you having to manually configure them.
The switch forwards multicast traffic destined for multicast groups (that it has learned from
IGMP snooping or that you have manually configured) to ports that are members of that
group. The switch discards multicast traffic destined for multicast groups that it does not
know. IGMP snooping generates no additional network traffic, allowing you to significantly
reduce multicast traffic passing through your switch.
7.6 Switch Setup Screen
Click
Basic Setting
and then
Switch Setup
in the navigation panel to display the screen as
shown. The VLAN setup screens change depending on whether you choose
802.1Q
or
Port
Based
in the
VLAN Type
field in this screen. Refer to the chapter on VLAN.
Summary of Contents for ES-2024A
Page 1: ...ES 2024A Ethernet Switch User s Guide Version 3 60 6 2005...
Page 33: ...ES 2024A User s Guide 32 Chapter 2 Hardware Installation and Connection...
Page 39: ...ES 2024A User s Guide 38 Chapter 3 Hardware Overview...
Page 74: ...ES 2024A User s Guide Chapter 8 VLAN 73 Figure 35 Port Based VLAN Setup All Connected...
Page 77: ...ES 2024A User s Guide 76 Chapter 8 VLAN...
Page 87: ...ES 2024A User s Guide 86 Chapter 11 Spanning Tree Protocol...
Page 99: ...ES 2024A User s Guide 98 Chapter 15 Link Aggregation...
Page 103: ...ES 2024A User s Guide 102 Chapter 16 Port Authentication...
Page 135: ...ES 2024A User s Guide 134 Chapter 23 Diagnostic...
Page 167: ...ES 2024A User s Guide 166 Chapter 27 Introducing the Commands...
Page 183: ...ES 2024A User s Guide 182 Chapter 28 Command Examples...
Page 193: ...ES 2024A User s Guide 192 Chapter 29 IEEE 802 1Q Tagged VLAN Commands...
Page 203: ...ES 2024A User s Guide 202 Chapter 30 Troubleshooting...
Page 207: ...ES 2024A User s Guide 206 Product Specifications...