Re: LACP problem

I was looking at this recently, heres what answered my question in the
command reference -

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_44_se/command/reference/cli1.html#wp2759080

The *lacp system-priority *command determines which switch in an LACP link
controls port priorities.

An LACP channel group can have up to 16 Ethernet ports of the same type. Up
to eight ports can be active, and up to eight ports can be in standby mode.
When there are more than eight ports in an LACP channel-group, the switch
on the controlling end of the link uses port priorities to determine which
ports are bundled into the channel and which ports are put in hot-standby
mode. Port priorities on the other switch (the noncontrolling end of the
link) are ignored.

In priority comparisons, numerically lower values have higher priority.
Therefore, the system with the numerically lower value (higher priority
value) for LACP system priority becomes the controlling system. If both
switches have the same LACP system priority (for example, they are both
configured with the default setting of 32768), the LACP system ID (the
switch MAC address) determines which switch is in control.

The *lacp system-priority *command applies to all LACP EtherChannels on the
switch.

Use the *show etherchannel summary* privileged EXEC command to see which
ports are in the hot-standby mode (denoted with an H port-state flag in the
output display).

For more information about configuring LACP on physical ports, see the
"Configuring EtherChannels" chapter in the software configuration guide for
this release.

S

On Sat, Nov 5, 2011 at 9:59 AM, CCIE KID <eliteccie_at_gmail.com> wrote:

> Hi fellas,
>
> What does LACP system id and priority means? Where does it get used in real
> time?
> Can someone shed some light on it ?
>
>
> --
> With Warmest Regards,
>
> CCIE KID
> CCIE#29992 (Security)
>
>
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Received on Sun Nov 06 2011 - 00:02:48 ART