Re: Strange status of EtherChannel!

Just FYI guys I did lab this up and it has nothing to do with the other side
not being configured. I was able to configure Cat1 with "channel-group 12
mode on" on the two interfaces connecting to Cat2. On Cat2 I only put the
channel-group command on one interface...interestingly enough, on Cat1 it
still shows both interfaces in the port channel, the port channel up, and
both with a status of "P." I actually would have expected that the 2nd link
would have not showed a "P" on Cat1. On Cat2, it just showed 1 link in the
bundle.

Just FYI Cat1 here is a 3550 and Cat2 is a 3560.

Cat1#sh run | beg 0/23
interface FastEthernet0/23
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-group 12 mode on
!
interface FastEthernet0/24
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-group 12 mode on

interface Port-channel12
 switchport trunk encapsulation dot1q
 switchport mode trunk
end

Cat2(config-if)#do sh run | beg 0/23
interface FastEthernet0/23
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-group 12 mode on
!
interface FastEthernet0/24
 switchport trunk encapsulation dot1q
 switchport mode trunk
!
interface Port-channel12
 switchport trunk encapsulation dot1q
 switchport mode trunk
end

Cat1#sh etherchan sum
Flags: D - down P - in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3 S - Layer2
        U - in use f - failed to allocate aggregator
        u - unsuitable for bundling
        w - waiting to be aggregated
        d - default port

Number of channel-groups in use: 1
Number of aggregators: 1

Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
12 Po12(SU) - Fa0/23(P) Fa0/24(P)

Cat2(config-if)#do sh etherchan sum
Flags: D - down P - in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3 S - Layer2
        U - in use f - failed to allocate aggregator
        u - unsuitable for bundling
        w - waiting to be aggregated
        d - default port

Number of channel-groups in use: 1
Number of aggregators: 1

Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
12 Po12(SU) - Fa0/23(P)

On Tue, Sep 1, 2009 at 12:09 AM, Martin Hogan
<martin.john.hogan_at_gmail.com>wrote:

> Hi,
>
> I've had this happen to me whilst labbing - it was during a broadcast
> storm.
> I couldn't replicate it nor work out what had happened though.
>
> Martin
>
>
>
>
> On Thu, Aug 27, 2009 at 11:28 PM, But Nicky <lyredhair_at_gmail.com> wrote:
>
> > Dear all,
> >
> > SW2(config)#do sh eth summ
> > Flags: D - down P - in port-channel
> > I - stand-alone s - suspended
> > H - Hot-standby (LACP only)
> > R - Layer3 S - Layer2
> > U - in use f - failed to allocate aggregato
> > U - unsuitable for bundling
> > W - waiting to be aggregated
> > D - default port
> > Number of channel-groups in use: 1
> > Number of aggregators: 1
> > Group Port-channel Protocol Ports
> >
> >
> ------+-------------+-----------+-----------------------------------------------
> >
> > 12 Po12(SU) - Fa0/19(P) Fa0/20(P) Fa0/21(P)
> Fa0/22(P)
> > Fa0/23() Fa0/24(P) Fa0/25P)
> > Fa0/26(P)
> >
> >
> > Each interface are shown as (P), except F0/23 (),What is the status of
> > F0/23? I have not saw it before, please help.
> >
> > Many thanks,
> > But Nguyen.
> >
> > P/S: This is question for OEQ, which I collected from internet, do not
> > require posting the configuration.
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
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-- 
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