3Com VCX V7111, User Manual

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3Com
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VCX V7111 VoIP Gateway User Guide
If ARP Manipulation is enabled, the following two commands are available.
ƒ Reply Type: Reply to a BootRequest can be either Broadcast or Unicast . The default
for the BootP Tool is Broadcast . In order for the reply to be set to Unicast , ARP
Manipulation must first be enabled. This then enables the BootP Tool to find the
MAC address for the client in the ARP cache so that it can send a message directly
to the requesting device. Normally, this setting can be left at
Broadcast .
ƒ ARP Type: The type of entry made into the ARP cache on the computer, once ARP
Manipulation is enabled, can be either Dynamic or Static . Dynamic entries expire
after a period of time, keeping the cache clean so that stale entries do not consume
computer resources. The Dynamic setting is the default setting and the setting most
often used. Static entries do not expire.
ƒ Number of Timed Replies: This feature is useful for communicating to VoIP gateways
that are located behind a firewall that would block their BootRequest messages from
getting through to the computer that is running the BootP Tool. You can set this value to
any whole digit. Once set, the BootP Tool can send that number of BootReply messages
to the destination immediately after you send a remote reset to a VoIP gateway at a valid
IP address. This enables the replies to get through to the VoIP gateway even if the
BootRequest is blocked by the firewall. To turn off this feature, set the
Number of Timed
Replies = 0 .
TFTP Preferences
ƒ Enabled: To enable the TFTP functionality of the BootP Tool, check the box beside this
heading. If you want to use another TFTP application, other than the one included with
the BootP Tool, unselect the box.
ƒ On Interface: This pull down menu displays all network interfaces currently available on
the computer. Select the interface that you want to use for the TFTP. Normally, there is
only one choice.
ƒ Directory: This option is enabled only when the TFTP is enabled. Use this parameter to
specify the folder that contains the files for the TFTP utility to manage ( cmp , ini , Call
Progress Tones, etc.).
ƒ Boot File Mask: Boot File Mask specifies the file extension used by the TFTP utility for
the boot file that is included in the BootReply message. This is the file that contains VoIP
gateway software and normally appears as
cmp .
ƒ ini File Mask: ini File mask specifies the file extension used by the TFTP utility for the
configuration file that is included in the BootReply message. This is the file that contains
VoIP gateway configuration parameters and normally appears as
ini .
ƒ Timeout: This specifies the number of seconds that the TFTP utility waits before
retransmitting TFTP messages. This can be left at the default value of 5 (the more
congested your network, the higher the value should be defined in these fields).
ƒ Maximum Retransmissions: Specifies the number of times that the TFTP utility tries to
resend messages after timing out. This can be left at the default value of 10 (the more
congested your network, the higher the value you should be defined in these fields).