Waters Network Systems
User’s Manual
Page 56
GSM-2116 and GSM-2124
which may seek its NMS, boot server, DHCP server and predefined connections in case the
whole building or block loses power. When this happens, the switch has to be rebooted.
Switches or other network devices on the LAN will try their best to find the server to return to
their services or try to set up the predefined links. Many broadcast packets will be issued.
The switch supports a random delay time for DHCP and boot delay for each device. This
suppresses the broadcast storm while all devices are booting at the same time. The maximum
user-defined delay time is 30 seconds.
If DHCP Broadcasting Suppression function is enabled,
the delay time is set randomly, ranging from 0 to 30 seconds. The exact delay time is computed
by the switch itself. The default is
Disable
.
Figure 5.28 – DHCP Boot
5.16 VLANs
The switch supports Tag-based VLAN (802.1q) and Port-based VLANs. 256 active VLANs are
supported and VLAN ID can range from 1~4094. VLAN configuration is used to partition your
LAN into small segments based on your LAN requirements. By properly configuring VLANs,
you can improve security and increase performance.
5.16.1 VLAN Mode
Function name:
VLAN Mode Setting
Function description:
The VLAN Mode Selection function includes five modes: Port-based, Tag- based, Metro Mode,
Double-tag and Disable. Choose a mode by using the drop-down list and selecting an item. Click
Apply
and the settings will take effect immediately.
Parameter description:
VLAN Mode:
Disable:
Stop VLAN function on the switch. In this mode, no VLAN is applied to the switch. This is
the default setting.
