LACP

[hheldner]

What does the flags "Slow LACPDU" and "Fast LACPDU" mean once I have created a channel group.It is regarding to the "show lacp internal" command on a catalyst 3550.

[amritpatek]

Link Aggregation Control Protocol data unit

It may be the device send with fast and slow request for LACPDU.

1) LACP_Activity is encoded in bit 0. This flag indicates the Activity control value with regard to this link. Active LACP is encoded as a 1; Passive LACP is encoded as a 0.

2) LACP_Timeout is encoded in bit 1. This flag indicates the Timeout control value with regard to this link. Short Timeout is encoded as a 1; Long Timeout is encoded as a 0.

[alaquiante · Accepted solution]

Hi Hartmut,

The Switch start to negotiate with LACP PDU in fast mode (every 1 sec.)

and when the FEC/GEC is stable e.g. running "in Use" slow LACP PDUs are used (every 30 sec.).

have a great day,

Andy

[hheldner]

Hi Andy,

many thanks for help. Now I understand this matter clearly. I'm going to remember you as an excellent teacher in Hamburg.

Have a nice day,

Hartmut