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SI-Ethernet User Guide
45
Issue: 3
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Specifies the operation mode of the gateway. By default the gateway is disabled and the switch
operates in normal switch mode. By enabling the gateway mode all packets are filtered by the
module and prioritized before being forwarded on. In strict mode the gateway will drop packets from
unsupported protocols.
The following protocols are supported in Strict Gateway mode, all other frames will be discarded:
•
Ethernet ARP (Address Resolution Protocol) used to resolve the network layer address (IP
address) into a link layer address (MAC address).
•
IGMP (Internet Group Management Protocol) used for establishing multicast group
memberships.
•
ICMP (Internet Control Message Protocol) used to send error messages such as device not
available or service unavailable error messages.
•
eCMP (Control Techniques' proprietary communication protocol).
•
CT DIP (Control Techniques' proprietary discovery protocol.
•
Modbus TCP/IP.
•
BOOTP (Bootstrap Protocol) used to assign IP addresses from a configuration server.
S.02.025
Gateway Mode
Minimum
0
(Display: Switch)
Maximum
2
(Display: Strict Gateway)
Default
0
(Display: Switch)
Units
None
Type
8 Bit User Save
Update Rate
Read on module reset
Display Format
None
Decimal Places
0
Coding
RW, Txt, BU
Value
Text
0
Switch
1
Gateway
2
Strict Gateway
VLAN must be enabled (
S.02.030
= On) if either gateway is selected.
NOTE