Re: PROBLEM WITH ETHERCHANNEL

From: ALL From_NJ (all.from.nj@gmail.com)
Date: Mon Feb 09 2009 - 02:29:59 ARST

Hey team,

I recreated this and got a similar error. It looks like something to do
with the order of the configs and negotiation between the switches. The
negotiation is the switches way of trying to 'auto-help' ;-)

I did my configs in stages. My topology: SW1 <---> SW3 <---> SW4 <--->
SW2

SW1 and SW2 should not see SW3 and SW4.

First, I enabled dot1q tunneling and verified all is well via cdp from SW1
and SW2.

Then I enabled trunking on SW1 and SW2 and verified vtp updates. I created
a few vlans and verified all is well.

I then created a L3 etherchannel on both switches. I did the SW1 switch and
got an error message related to the remote side. I then went and did the
second switch and got a similar error message.

I went back and re-did the first switch and all is well now. It appears
that the negotiating between the switches is trying to help you out.

If the configs will help, let me know and I will paste them. I will also be
deleting all the configs later this week ...

Andrew Lee Lissitz

On Sun, Feb 8, 2009 at 1:16 PM, Hobbs <deadheadblues@gmail.com> wrote:

> Karim,
>
> Make sure the trunk link between SW1 and SW2 is allowing vlans 100 and
> 200 AND these ports are not being blocked in the STP.
>
> Vlans 100 and 200 only need to exist in SW1 and SW2, so make sure you
> have not created them elsewhere, this could cause l2ptguard errors or
> undesirable STP between SW1 and SW2 (if SW3 or 4 became root
> unknowingly).
>
> btw, are you getting any l2ptguard errors?
>
> -hth
>
> On Sun, Feb 8, 2009 at 10:31 AM, GAURAV MADAN <gauravmadan1177@gmail.com>
> wrote:
> > Well ur config looks to be in shape .
> > thing I can say to you abt etherchannel problems is ..... the sequence
> of
> > aplying commands matter a lot .
> > So go ahead .. unconfigue .... configre again .. by configuring the ends
> > where u are enabling "channel-group mode<>" cli and then doing at other
> end
> > .
> >
> > This will work .. i generealy do this when i face such problems
> >
> > Gaurav Madan
> >
> > On Sun, Feb 8, 2009 at 8:00 PM, NET HE <he_net@hotmail.com> wrote:
> >
> >> In 3560 configuration guide, it says
> >>
> >> "with layer 3 ports, you should manually create the logical interface by
> >> using
> >> the interface port-channel glocal configuration command followed by the
> no
> >> switchport interface configuration command. Then you manually assign an
> >> interface to the EtherChannel by using the channel-group interface
> >> configuration command. "Best Regards, Net (Xin) He > Date: Sun, 8 Feb
> 2009
> >> 17:10:09 +0300> Subject: Re: PROBLEM WITH ETHERCHANNEL> From:
> >> karim.jamali@gmail.com> To: ccielab@groupstudy.com> > It is not needed
> >> since
> >> iuthe no switchport command is already assigned on the> member
> >> interfaces.> The
> >> portchannel is layer 3.> > On Sun, Feb 8, 2009 at 5:02 PM, NET HE
> >> <he_net@hotmail.com> wrote:> > > Do you have cmd "no switchport" under
> the
> >> "int port34" ?> >> > Best Regards,> > Net (Xin) He> >> >> >> >> > >
> Date:
> >> Sun,
> >> 8 Feb 2009 10:07:19 +0300> > > Subject: PROBLEM WITH ETHERCHANNEL> > >
> >> From:
> >> karim.jamali@gmail.com> > > To: ccielab@groupstudy.com> >> > >> > >
> Dear
> >> Experts,> > >> > > Scenario 4 switches: SW1,SW2,SW3, & SW4. Layer 3
> >> Etherchannel is to be> > > formed between SW4 (16&18) and SW3(13-14).> >
> >>
> >> >
> >> > SW4(16-18) CONNECTED TO SW2 (FA0/19,FA0/21)> > > SW3(13-14) CONNECTED
> TO
> >> SW1
> >> (FA0/16,FA0/17)> > >> > > Dot1q tunneling has been configured between
> the
> >> two
> >> switches (SW2 AND> > SW1).> > > Configuration is as follows:> > >> > >
> SW4>
> >> >
> >> > conf t> > > int range fa0/16,fa0/18> > > no switchport> > > sh> > >
> >> channel-group 34 mode desirable> > >> > > int port34> > > ip add
> >> 156.18.109.10
> >> 255.255.255.0> > > int range fa0/16,fa0/18> > > no sh> > >> > > SW3> > >
> >> conf
> >> t> > >> > > int range fa0/13-14> > > no switchport> > > sh> > >
> >> channel-group
> >> 34 mode desirable> > >> > > int port34> > > ip add 156.18.109.9
> >> 255.255.255.0>
> >> > >> > > int range fa0/13-14> > > no sh> > >> > > SW1> > > conf t> > >
> int
> >> fa0/16> > > switchport mode dot1q-tunnel> > > l2protocol-tunnel
> >> point-to-point
> >> pagp> > > switchport access vlan 100> > > no sh> > >> > > int fa0/17> >
> >
> >> switchport mode dot1q-tunnel> > > l2protocol-tunnel point-to-point pagp>
> >
> >> >
> >> switchport access vlan 200> > > no sh> > >> > > SW2> > > conf t> > > int
> >> fa0/19> > > switchport mode dot1q-tunnel> > > l2protocol-tunnel
> >> point-to-point
> >> pagp> > > switchport access vlan 100> > > no sh> > >> > > int fa0/21> >
> >
> >> switchport mode dot1q-tunnel> > > l2protocol-tunnel point-to-point pagp>
> >
> >> >
> >> switchport access vlan 200> > > no sh> > >> > >> > > I am getting the
> error
> >> message: CANNOT BUNDLE ETHERCHANNEL NOT ENABLED ON> > > THE REMOTE
> DEVICE.>
> >> >
> >> >> > > I have no clue what could be causing this.> > >> > > --> > > KJ>
> >
> >> >> >
> >> >> > > Blogs and organic groups at http://www.ccie.net> > >> > >
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> >> >
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> >> >> >
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> >
> > _______________________________________________________________________
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>
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>
> _______________________________________________________________________
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-- 
Andrew Lee Lissitz
all.from.nj@gmail.com

Blogs and organic groups at http://www.ccie.net

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