Table 55: Server Statistics Fields (continued)
Field
Description
DHCPOFFER
Shows the number of DHCPOFFER messages sent by the DHCP server.
DHCPACK
Shows the number of DHCPACK messages sent by the DHCP server.
DHCPNAK
Shows the number of DHCPNAK messages sent by the DHCP server.
Message Sent
DHCPOFFER
The number of DHCP offer messages the DHCP server has sent to DHCP clients
in response to DHCP discovery messages it has received.
DHCPACK
The number of DHCP acknowledgement messages the DHCP server has sent to
DHCP clients in response to DHCP request messages it has received. The server
sends this message after the client has accepted the offer from this particular
server. The DHCP acknowledgement message includes information about the
lease time and any other configuration information that the DHCP client has
requested.
DHCPNAK
The number of negative DHCP acknowledgement messages the DHCP server
has sent to DHCP clients. A server might send this type of message if the client
requests an IP address that is already in use or if the server refuses to renew the
lease.
•
Click
Refresh
to update the information on the screen.
•
Click
Clear Server Statistics
to reset all counters to zero.
Conflicts Information
Use the Conflicts Information page to view information on hosts that have address conflicts; that is,
when the same IP address is assigned to two or more devices on the network.
To access this page, click
System
>
Advanced Configuration
>
DHCP Server
>
Conflicts
in the
navigation menu.
Table 56: Conflicts Information Fields
Field
Description
IP Address
The IP address that has been detected as a duplicate.
Detection Method
The method used to detect the conflict, which is one of the following:
•
Gratuitous ARP – The
client detected the conflict by broadcasting an
ARP request to the address specified in the DHCP offer message sent by the
server. If the client receives a reply to the ARP request, it declines the offer
and reports the conflict.
•
Ping – The server detected the conflict by sending an
echo message
(ping) to the IP address before offering it to the DHCP client. If the server
receives a response to the ping, the address is considered to be in conflict
and is removed from the pool.
•
Host Declined – The server received a DHCPDECLINE message from the host.
A DHCPDECLINE message indicates that the host has discovered that the IP
address is already in use on the network.
Configuring System Information
ExtremeSwitching 200 Series: Administration Guide
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