User Manual Managed Switches
37
Maximum Frame Size
Setting
Description
Factory
Default
1518 to 9600
(bytes)
Enter the maximum frame size allowed for the switch
port, including FCS.
9600 (bytes)
Excessive Collision Mode
Setting
Description
Factory
Default
Discard / Restart
Configures the port transmission behavior with
collisions:
Discard: Discard frame after 16 collisions
Restart: Restart backoff algorithm after 16 collisions
Discard
Frame Length Check
Setting
Description
Factory
Default
Check / Uncheck
Configures if frames with incorrect frame length in the
EtherType/Length field shall be dropped. An Ethernet
frame contains a field EtherType which can be used to
indicate the frame payload size (in bytes) for values of
1535 and below. If the EtherType/Length field is above
1535, it indicates that the field is used as an EtherType
(indicating which protocol is encapsulated in the
payload of the frame). If "frame length check" is
enabled, frames with payload size less than 1536
bytes are dropped, if the EtherType/Length field
doesn't match the actual payload length. If "frame
length check" is disabled, frames are not dropped due
to frame length mismatch.
Unchecked
3.4.2 Port Trunking
Link Aggregation allows one or more links to be aggregated together to form a Link Aggregation
Group. A MAC client can treat Link Aggregation Groups as if they were a single link.
The Weidmüller switch's Port Trunking feature allows devices to communicate by aggregating
several trunk groups (half of total number of ports), with a maximum of 16 ports for each group. If one
of the 16 ports fails, the other 15 ports will provide back up and share the traffic automatically.
Port Trunking can be used to combine up to 16 ports between two Weidmüller switches. If all ports on
both switch units are configured as 100BaseTX and they are operating in full duplex, the potential
bandwidth of the connection will be 3200 Mbps.
The Port Trunking protocol provides the following benefits:
•
Gives you more flexibility in setting up your network connections, since the bandwidth of a
link can be increased.
•
Provides redundancy
—if one link is broken, the remaining trunked ports share the traffic
within this trunk group.
