Lancom ES-2126+ Manual page 94

if there are three Fast Ethernet ports aggregated in a logical port, then this
logical port has bandwidth three times as high as a single Fast Ethernet port
has.
The switch supports two kinds of port trunking methods:
³
LACP:
Ports using Link Aggregation Control Protocol (according to IEEE 802.3ad
specification) as their trunking method can choose their unique LACP
GroupID (1~3) to form a logic "trunked port". The benefit of using LACP
is that a port makes an agreement with its peer port before it becomes a
ready member of a "trunk group" (also called aggregator). LACP is safer
than the other trunking method - static trunk.
The switch LACP does not support the followings:
Link Aggregation across switches
Aggregation with non-IEEE 802.3 MAC link
Operating in half-duplex mode
Aggregate the ports with different data rates
·
Static Trunk:
Ports using Static Trunk as their trunk method can choose their unique
Static GroupID (also 1~3, this Static groupID can be the same with
another LACP groupID) to form a logic "trunked port". The benefit of using
Static Trunk method is that a port can immediately become a member of
a trunk group without any handshaking with its peer port. This is also a
disadvantage because the peer ports of your static trunk group may not
know that they should be aggregate together to form a "logic trunked
port". Using Static Trunk on both end of a link is strongly recommended.
Please also note that low speed links will stay in "not ready" state when
using static trunk to aggregate with high speed links.
As to system restrictions about the port aggregation function on the
switch, in the management point of view, the switch supports maximum
3 trunk groups for LACP and additional 3 trunk groups for Static Trunk. But
in the system capability view, only 3 "real trunked" groups are supported.
An LACP trunk group with more than one ready member-ports is a "real
trunked" group. An LACP trunk group with only one or less than one ready
member-ports is not a "real trunked" group. Any Static trunk group is a
"real trunked" group.
LANCOM ES-2126+ and LANCOM ES-2126P+
Chapter 4: Operation of Web- based Management
93