Contemporary Control Systems EISC Configurable Switches User Manual - Manual (Page 23)

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7.2.6
Advanced Features
7.2.6.1
Port Trunking
Port Trunking allows four ports to be grouped together with the resulting group behaving
as a single logical link. Each trunk is constructed of four fixed physical ports — with one
status “LED” for each Trunk Group shown in the main screen of the configuration
program. This “LED” will glow solid green when the trunk is enabled and operating
properly. If the link for any physical port of a trunk fails, then all of the physical ports of
the trunk are treated as defective and the trunk “LED” will no longer glow — thus
indicating a fault condition.
Model EISC16-100T supports four trunks and the trunk selection in its Advanced
Settings display will appear as shown in Figure 20.
Figure 20 — Trunk Options :
EISC16-100T
Figure 21 — Trunk Options :
EISC12-100T/FC & EISC12-100T/FT
Models EISC12-100T/FC and EISC12-100T/FT support two trunks and the trunk options
in their Advanced Settings display will appear as shown in Figure 21.
To keep frames in order, packets with identical source/destination MAC addresses are
sent over the same trunk path — but the reverse path may follow a different link. A
hash algorithm is used to balance the load between links in a trunk.