FL SWITCH 2000 / FL NAT 2000
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PHOENIX CONTACT 108997_en_04
4.2.10 Operation in Unmanaged mode
During operation in Unmanaged mode, the switch can be used without an IP address. Here,
the switch adopts the static IP address 0.0.0.0. The subnet mask and gateway are also con-
figured to 0.0.0.0. This means that web-based management can no longer be accessed and
the switch no longer sends BootP and DHCP requests.
Major functions remain active in Unmanaged mode:
– Redundancy mechanisms for loop suppression (RSTP, FRD, LTS)
– Functions for hardening the network (broadcast/multicast limiter)
– Functions for reducing the network load (IGMP snooping)
The functions must be configured in Managed mode and will remain active when switching
to Unmanaged mode. Alternatively, Unmanaged mode can be activated using a configura-
tion file and SD card.
4.3 Assigning IP parameters via BootP
The device uses the BootP protocol for IP address assignment. Numerous BootP servers
are available on the Internet. You can use any of these programs for address assignment.
This section explains IP address assignment using the “FL NETWORK MANAGER BASIC”
(Order No. 2702889) and the “IP Assignment Tool” software tools from Phoenix Contact.
Notes on BootP
During initial startup, the device sends BootP requests without interruption until it receives
a valid IP address. As soon as the device receives a valid IP address, it stops sending fur-
ther BootP requests.
After a restart, the device sends three BootP requests and only adopts the old IP address if
there is no BootP response.
Use of IGMP in Unmanaged mode is limited to IGMP snooping.
The switch requires an IP address if the device is also to be used as an IGMP querier.
Unmanaged mode can only be exited by switching to a different Smart mode or by reset-
ting the switch to the factory default settings.
On the standard versions, BootP is activated in the delivery state. On the PROFINET ver-
sions, DCP is activated in the delivery state.
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