EL-2800M-GE2 / EL-2800C-GE2
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5. Input and output
5.1 GigE Interface
5.1.1 GigE Vision 2.0 Extension functions
EL-2800-GE2 complies with GigE Vision 2.0. Its extension functions are described below.
5.1.1.1 Link Aggregation
By handling two ports as one port, the maximum transfer rate can be achieved at 2 Gbps.
This function is based on IEEE802.3ad, IEEE802.1AX Link Aggregation and GigE Vision 2.0.
Table 2. Link Aggregation Specifications
Link Aggregation
system
sLAG(Static Link
Aggregation Group) and
dLAG(Dynamic Link
Aggregation Group)
When dLAG is selected, LACP selects
automatically.
When sLAG is selected, if HW conditions are not
satisfied, SL (Single Link) is activated.
Load distribution
system
Round-robin processing
GVSP Ether Frame is output from Port 0 or Port
1 alternatively.
When the first packet (Leader packet : Leader
frame) of the video frame is output, the
output port is reset to 0.
Physical Network
Number
2 Ports
Port 0 and Port 1 are enabled.
In Single Link (SL), either Port 0 or Port 1 is
used.
MAC Address
Number
1
As only SL, sLAG and dLAG are supported, MAC
Address is one. Port 0 and Port 1 use the same
MAC Address
．（
Note 1
）
IP Address
Number
1
As only SL, sLAG and dLAG are supported, IP
Address is one. Port 0 and Port 1 use the same
IP Address
．（
Note 1
）
GVCP Port
GVCP returns ACK to the port which receive the
command.
Stream Channel
Number
1 Channel
When SL is used, one stream is output from
either Port0 or Port1 which is linked up.
When sLAG or dLAG is used, one stream is
output in load-balanced from Port 0 and Port1.
SL/sLAG
Selecting
Method
Selected by the status of
Port Link UP
If only 1 port is linked up, it is SL.
If sLAG is enabled, and if Port 0 and Port 1 are
linked up, the status is changed to sLAG.
If dLAG is enabled, and if Port 0 and Port 1 are
linked up, the status is set to dLAG by LACP or
is reverted to SL.
Event Message
GEV_EVENT_LINK_SPEED_C
HANGE
If a change of SL to or from LAG occurs,
GEV_EVENT_SPEED_CHANGE Event Message can
be issued.
Note 1: In Link Aggregation operation, two ports use the same MAC Address and IP Address.
Accordingly, if these two ports are connected to only one non-compliant IEEE802.3ad
or IEEE802.1AX switch, the function is not properly executed.
If non-compliant
IEEE802.3ador IEEE802.1AX switch is used, 2 sets should be used and connected to
each port.
