Zyxel VES-1616FE-55A [235/318] Hapter

Zyxel VES-1616FE-55A [235/318] Hapter
VES-1616FE-55A User’s Guide
235
CHAPTER 42
Dot3ad
42.1 Aggregation Switch Mode
IEEE 802.3ad link aggregation (trunking) is the grouping of physical ports into one logical
higher-capacity link. You may want to trunk ports if for example, it is cheaper to use multiple
lower-speed links than to under-utilize a high-speed, but more costly, single-port link.
A trunk group is one logical link containing multiple ports. The beginning port of each trunk
group must be physically connected to form a trunk group. The VES-1616FE-55A supports
both static and dynamic link aggregation.
" You don’t have available ports after you aggregate the two Ethernet ports on
the VES-1616FE-55A.
" In a properly planned network, it is recommended to implement static link
aggregation only. This ensures increased network stability and control over the
trunk groups on your VES-1616FE-55A.
42.2 Dynamic Link Aggregation
The VES-1616FE-55A adheres to the IEEE 802.3ad standard for static and dynamic (LACP)
port trunking.
The VES-1616FE-55A supports the link aggregation IEEE802.3ad standard. This standard
describes the Link Aggregation Control Protocol (LACP), which is a protocol that
dynamically creates and manages trunk groups.
When you enable LACP link aggregation on a port, the port can automatically negotiate with
the ports at the remote end of a link to establish trunk groups. LACP also allows port
redundancy, that is, if an operational port fails, then one of the “standby” ports become
operational without user intervention. Please note that:
You must connect all ports point-to-point to the same Ethernet switch and configure the
ports for LACP trunking.
LACP only works on full-duplex links.

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