Configuring The J-Link - Segger J-Link User Manual

3.4.1.2 Connecting via Ethernet only
This way of reading out the IP address of J-Link can be used for example if you do
not have administrator rights on the host system in order to install the USB driver
which is necessary to connect to J-Link via USB. To get the IP address which has
been assigned to J-Link via DHCP, you have to read it out from the DHCP IP Assign-
ment table of your DHCP Server:
You can easily identify your J-Link by its host ID (in this case JLINK23) and by its
MAC addr which always starts with: 00-22-C7-01-XX-XX where XX depends on the
serial number of your J-Link. In this case the serial number of the connected J-Link is
23 (0x0017), so its IP address is: 00-22-C7-01-00-17.
3.4.2

Configuring the J-Link

By default, J-Link is configured to receive an IP address and a subnet mask via DHCP.
It is also possible to assign a fixed IP address to it. Setting up J-Link can be done via
JLink.exe or via web interface. In the following, both configuration methods are
described.
3.4.2.1 Configuring J-Link via JLink.exe
Configuring J-Link via JLink.exe is very simple because only one command (in dif-
ferent variations) is necessary to choose between automatic IP address and dynamic
IP address assignment.
Note: If you want to configure J-Link via JLink.exe and J-Link is connected to
your host-system via Ethernet only, you have to type in the ip <IPAddr> command.
Example
ip 192.168.199.29
Assigning an IP address via DHCP
By default, J-Link is configured to acquire an IP address via DHCP, so it should not be
necessary to configure this. But, if you change the IP address to a fixed one, DHCP is
disabled from this point. To re-enable DHCP you should use the ipaddr DHCP com-
mand in JLink.exe. The ipaddr command will be explained in the following.
J-Link / J-Trace (UM08001) © 2004-2011 SEGGER Microcontroller GmbH & Co. KG
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