Zyxel VES-1624FT-55A [237/312] Aggregation switch mode

Zyxel VES-1624FT-55A [237/312] Aggregation switch mode
VES-1624FT-55A User’s Guide
237
CHAPTER 45
Dot3ad
45.1 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 IP DSLAM supports both static
and dynamic link aggregation.
" You don’t have available ports after you aggregate the two Ethernet ports on
the IP DSLAM.
" 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 IP DSLAM.
45.2 Dynamic Link Aggregation
The IP DSLAM adheres to the IEEE 802.3ad standard for static and dynamic (LACP) port
trunking.
The IP DSLAM 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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