Allied Telesis AT-S106 - Manual (Page 87)

AT-S106 Management Software Web Browser User’s Guide
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packets. If it begins to receive LACPDU packets, it automatically
transitions to an active or standby mode as part of an aggregate trunk.
If there is more than one aggregate trunk on a switch, each trunk may
requires a separate aggregator or it may be possible to combine them
under a common aggregator. The determining factor is whether the trunks
are going to the same device or different devices. If the trunks are going to
the same device, each trunk must have its own aggregator. If they are
going to different devices, the trunks can be members of a common
aggregator. In the latter situation, the switch differentiates the individual
aggregate trunks.
Here are two examples. Figure 26 illustrates the AT-GS950/48 Gigabit
Ethernet Smart Switch with two LACP trunks, each containing three links.
Because both aggregate trunks go to the same 802.3ad-compliant device,
in this case another Fast Ethernet switch, each trunk requires a separate
aggregator.
Figure 26. Example of Multiple Aggregators for Multiple Aggregate Trunks
Caution
The example cited here illustrates a loop in a network. Use
Spanning Tree to avoid network loops and prevent broadcast
storms. See Chapter 13, on page 143 for more information
concerning the configuration of Spanning Tree.
Ports 4, 6, 8
in Aggregator 1
Ports 20, 22, 24
in Aggregator 2
AT-GS950/48
Switch
802.3ad-compliant
Ethernet Switch
Aggregate Trunks
in Different Aggregators
AT-GS950/48
Switch