Waters Network Systems
2800M/MR User’s Manual
Page 49
Trap:
There are six trap hosts supported. Each of them has its own community name and IP address
and is user-definable. To set up a trap host means to create a trap manager by assigning an IP
address to host the trap message. In other words, the trap host is a network management unit
with SNMP manager receiving the trap message from the managed switch with SNMP agent
issuing the trap message. Six trap hosts can prevent the important trap messages from being
lost.
For each public trap, the switch supports the trap events Cold Start, Warm Start, Link Down,
Link Up and Authentication Failure Trap. They can be enabled or disabled individually. When
enabled, the corresponding trap will actively send a trap message to the trap host when a trap
happens. If all public traps are disabled, no public trap message will be sent. As to the
Enterprise (no. 6) trap is classified as private trap, which are listed in the Trap Alarm
Configuration function folder.
Default for all public traps:
Enable
.
Figure 5.16 – SNMP Configuration
5.10
DHCP Boot
The DHCP Boot function is used to spread the request broadcast packet into a bigger time
frame. This is done to prevent the traffic congestion due to broadcast packets from many
network devices which may seek its NMS, boot server, DHCP server and many connections
predefined when the whole building or block loses power and then reboots and recovers.
Switches and other network devices on the LAN will try their best to find the server to obtain
services or try to set up the predefined links, so they will issue many broadcast packets in the
network.
The switch supports a random delay time for DHCP and boot delay for each device. This
suppresses the broadcast storm while all devices are at booting stage in the same time. The
maximum user-defined delay time is 30 sec.
If DHCP Broadcasting Suppression function is
enabled, the delay time is set randomly, ranging from 0 to 30 seconds, because the exact delay
time is computed by the switch itself. The default is
Disable
.
