SatLink VSAT User Guide
Publication no. 101557
Copyright © 2009 – STM Group, Inc.
Page 140 (160)
To view the DHCP server configuration and, if enabled, the DHCP client table, use the CLI command ip
dhcp show.
Example:
#
ip dhcp show
DHCP Server Status
-------------------------------------------
Server Status : Enabled
Server IP address : 10.20.42.1
Server IP address range :
Starting IP address : 10.20.42.1
Ending IP address : 10.20.42.254
No of IP addresses excluded : 3
Excluded IP address range :
Starting IP address : 10.20.42.252
Ending IP address : 10.20.42.254
Lease Time : 1 Hour 32 Minutes 35 Seconds
Primary DNS server : 10.20.42.1
Secondary DNS server : 213.42.20.20
DHCP Client Table
-----------------
Host Name IP Address HW MAC Address Lease expires
TERMINAL-06 10.20.42.2 1 00:1f:29:3e:e6:e9 Mon Feb 23 12:42:55 2009
The DHCP client table is only displayed when the DHCP server is enabled. The table will display the host
name, the allocated IP address, the host MAC address and the address lease expiration time for each
computer registered by the DHCP server.
Until the VSAT has acquired lock on the forward link and received the system time via the
Time and Date Table (TDT) from the Hub, it will have no information of the current time.
The DHCP server will in this situation only lease IP addresses to the LAN hosts for 15
minutes until the system time is set. The message
Lease expires in less than 15
minutes
will be displayed in the DHCP client table.
H.3.1 Changing the SatLink VSAT LAN Interface IP address
If the IP address of the SatLink VSAT LAN Interface is changed, the IP addresses of all end-user devices
that are connected to the SatLink VSAT LAN must be updated correspondingly.
This also applies to those end-user devices that have obtained their IP addresses automatically from the
DHCP server. As the end-user devices will not normally issue a request to the DHCP server before the
lease-time of their IP addresses has expired, an IP address update of these devices must be manually
triggered by the end-user.
For example, to trigger a PC running Microsoft Windows OS to request a new IP address from the DHCP
server, the end-user can issue the command ipconfig /renew in the DOS command window.
If the end-user device does not have provisioned means for manually triggering a DHCP request for IP
address update, please power off and on again the end-user device. This will normally result in the end-
user device requesting the VSAT DHCP server for an IP address as part of the end-user device
initialization process.
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