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3 The Modular System SyncFire 1200
3.1 Network Configuration Concept
The LANTIME system supports a wide range of different network environments due to its flexible and powerful
network configuration concept. A separation between physical and logical ("virtual") interface configurations
covers almost all possible requirements for datacenters, telecommunication backhaul networks and industrial
network environments.
Each LANTIME server has at least one physical ethernet interface which is provided by the CPU module
(lan0). Additional network interfaces can be provided by network expansion cards (LNE or TSU cards) or on
backplanes (depending on model). These additional physical interfaces can be used to provide synchronization
services to multiple physical network segments, to separate management and synchronization networks or to
combine multiple ethernet interfaces to form redundant connections ("bonding"). The 6th generation of LANTIME
firmware (LTOS6) can manage up to 99 physical network interfaces as a theoretical maxmium.
Configuration of IPv4 and IPv6 addresses is done based on logical interface configurations. Each logical
interface is assigned to one physical ethernet port and can be configured to use one IEEE 802.1q VLAN ID. The
current firmware version supports up to 99 logical interfaces per server and all of those could be theoretically
assigned to a single physical port.
The network ports of TSU modules (for PTP and Hardware-NTP) are not providing this logical interface
functionality and are limited, at least in the current firmware version, to one IPv4/IPv6 address and one VLAN
ID per physical interface. Redundancy and connectivity to multiple network segments and VLANs can be
achieved by adding multiple TSU cards in a system.
For each logical interface the available netwokr services for synchronization (NTP, TIME, ..) and manage-
ment (HTTP, HTTPS, SSH, SNMP, TELNET, ...) can be enabled/disabled individually. This allows to only
provide synchronization on one IP address and remote access the unit for management tasks over a different IP
address.
SyncFire 1200
Date: 31st March 2021
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