Port Trunking

Port Status and Configuration

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 12-5 on page 12-22.)

Figure 12-8. 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 the maximum number of allowed ports in a dynamic LACP trunk configuration. When the maimum number of allowed 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 12-5, "LACP Port Status Data", on page 12-22.)In the next example, ports A1 through A5 have been configured for the same dynamic LACP trunk, even though a maximum of four ports are allowed in a trunk by the switch. Notice that one of the links shows Standby status, while the remaining four links are “Up”.

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