Port Trunking; Lag; Lag Membership - Delta DVS-328 series User Manual

D V S M a n a g e d I n d u s t r i a l R a c k Mo u n t E t h e r n e t S wi t c h U s e r Ma n u a l

3.9 Port Trunking

Port Trunking can help you aggregate more links to form one link group. The LAG function of Delta DVS series
switch supports 3 trunk groups, and you can assign 8 ports to one group. But there is a limit of 3 gigabit ports or
7 10/100Mbps ports for each lag ID. Link Aggregation (LA) increases the capacity and availability of the
communication channel between devices (both switches and end stations) using existing Fast Ethernet and the
Gigabit Ethernet technology. LA also provides load balancing where the processing activity and the
communication activity are distributed across several links in a trunk.
If there are 4 ports in a trunk group, and one port fails, then the other seven ports will provide backups and
share the traffic automatically. LA also can be used to combine 4 ports between Delta DVS series switches. If
all ports on these two switches are configured as 100BaseTX and full duplex, then the potential bandwidth of
the connection can be 400Mbps.The function theory is shown in the figure below.
IMPORTANT:
Make sure that you save the configuration in the Save Configuration
page after you have applied the configuration changes. (Save
ConfigSave Configuration) If you do not save the configuration,
then the configuration will be cleared after the switch is rebooted.

3.9.1 LAG

Link aggregation groups (LAGs) let you combine multiple full-duplex Ethernet links into a single logical link.
LAG increases fault tolerance and provide traffic sharing. You can assign LAG VLAN membership after you
have added interfaces as members of a LAG.
After you have added interfaces to a LAG and enabled the LAG, Link Aggregation Control Protocol (LACP) can
automatically configure a port channel link between the switch and another device.

3.9.1.1 LAG Membership

When the static mode of the port-channel is enabled, it does not transmit or receive LACPDUs. For example,
the member ports do not transmit LACPDUs and all the LACPDUs which are received may be dropped. The
factory default is disabled, which means the port-channel is dynamic.
If you want to enable the static mode of a LAG on the Delta switch, make sure that the static mode of a LAG of
the other switch which connects to the Delta switch is enabled, too.
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