ABB i-bus KNX IPR/S 3.5.1, Product Manual

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ABB i-bus ® KNX
Planning and application
IPR/S 3.5.1 | 2CDC502099D0211 Rev. A 35
4 Planning and application
4.1 The IP Router Secure in the network
The IP Router Secure is designed for use in 10/100 BaseT networks compliant to IEEE 802.3. The device
features an AutoSensing function and sets the baud rate (10 or 100 Mbit) automatically.
4.1.1 Assignment of IP address
DHCP/AutoIP
The IP address of the device can be received from a DHCP server. This requires setting automatic IP
address assignment in the ETS, see parameter window IP settings . If no DHCP server is found with this
setting, the device starts an AutoIP procedure and autonomously assigns itself an IP address from the
range 169.254.xxx.yyy.
The IP address that the device receives (via DHCP or AutoIP) during startup will be retained until
• the next reboot (switching off/on or reprogramming).
•
a DHCP server is available
• the DHCP lease expires
No DHCP server is available during startup
If no DHCP server is available during startup of the IP Router Secure, the device will assign itself an
AutoIP address. The Router then cyclically (three telegrams at intervals of 3 seconds, followed by a pause
of 20 seconds) searches for a DHCP server. As soon as a server is available again, the address assigned
by the DHCP server is used.
DHCP server fails (device has already received IP address from DHCP)
Requests to extend the utilization rights for this IP address remain unanswered until the end of the lease
time (IP address validity time; this is defined by the DHCP server during assignment of the IP address).
The IP address continues to be used.
At the end of the lease time or after a download, the device searches for an AutoIP address.
Static IP address
If the IP address of the IPR/S is to have a fixed assignment, a static IP address (as well as a subnet mask
and a default gateway) can be set in the ETS, see parameter window IP settings .