Re: Strange status of EtherChannel!

Just a crappy scenario that might do it... if the port wasn't configured to
trunk and the other ports were, might it cause this scenario?

Too lazy to lab it up myself and see the results.

On Tue, Sep 1, 2009 at 12:42 AM, Joe Astorino <jastorino_at_ipexpert.com>wrote:

> 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.
> > >
> > >
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>
>
> --
> Regards,
>
> Joe Astorino - CCIE #24347 R&S
> Technical Instructor - IPexpert, Inc.
> Cell: +1.586.212.6107
> Fax: +1.810.454.0130
> Mailto: jastorino_at_ipexpert.com
>
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