Optimizing Traffic Flow with Port Controls, Port Trunking, and Filters

Port Trunking

Listing Static LACP and Dynamic LACP Trunk Data. This command lists data for only the LACP-configured ports.

Syntax: show lacp

In the following example, ports A1 and A2 have been previously configured for a static LACP trunk. (For more on “Active”, see table 11-7 on page 9-27.)

Figure 9-10. Example of a Show LACP Listing

Dynamic LACP Standby Links. Dynamic LACP trunking enables you to configure standby links for a trunk by including more than four ports in a dynamic LACP trunk configuration. When four ports (trunk links) are up, the remaining link(s) will be held in standby status. If a trunked link that is “Up” fails, it will be replaced by a standby link, which maintains your intended bandwidth for the trunk. (See also the “Standby” entry under “Port Status” in "Table 9-7. LACP Port Status Data" on page 9-27.)In the next example, ports A1 through A5 have been configured for the same LACP trunk. Notice that one of the links shows Standby status, while the remaining four links are “Up”.

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