Re: PROBLEM WITH ETHERCHANNEL

From: ALL From_NJ (all.from.nj@gmail.com)
Date: Mon Feb 09 2009 - 12:17:33 ARST

It looks like you only sent this to me ... I have re-added the list. Hope
this is what you wanted.

Here is my configs and set up.

SW3 and SW4 are the SP switches or the ones that I want to 'disappear' and
'hide' from sw1 and sw2. SW3 and SW4 have a trunk link between and are
sharing vtp, cdp etc ... all looks well with the trunk between sw3 and sw4.
Make sure that the trunk is up and going, and vtp is up first before moving
on.

Configured on both SW3 and SW4, for the links going to SW1 and SW2 (if the
format looks messed up, unicast me and I will attach a txt file to you):

interface GigabitEthernet0/1
 switchport access vlan 31
 switchport mode dot1q-tunnel
 l2protocol-tunnel cdp
 l2protocol-tunnel stp
 l2protocol-tunnel vtp
 l2protocol-tunnel point-to-point pagp
 l2protocol-tunnel point-to-point lacp
 l2protocol-tunnel point-to-point udld
 no cdp enable
!
interface GigabitEthernet0/2
 switchport access vlan 32
 switchport mode dot1q-tunnel
 l2protocol-tunnel cdp
 l2protocol-tunnel stp
 l2protocol-tunnel vtp
 l2protocol-tunnel point-to-point pagp
 l2protocol-tunnel point-to-point lacp
 l2protocol-tunnel point-to-point udld
 no cdp enable

I prefer to LACP for everything ...

While you are t-shooting this, might be best if you keep it simple and just
verify that SW3 and SW4 are 'hidden' after these configs. sho cdp nei on
sw1 and 2, and you will not see sw3 or sw4.

Next configure trunk links on sw1 and sw2 so that they can share vtp and
pass vlan tags etc between them ... . Use dot1q for everything. Create a
vlan on sw1 and verify it shows up on sw2.

On SW1 and SW2, I configured normal etherchannel first and then L3. After
L3 etherchannel was configured, I pinged, checked cdp nei, etc ...

HTH,

Andrew Lee Lissitz

On Mon, Feb 9, 2009 at 1:58 AM, karim jamali <karim.jamali@gmail.com> wrote:

> Hey GS,
>
> I have re-tried this over 3 times and i tried to make the order of
> operations correct making sure one side is shutdown and then unshutting one
> side @ a time.But it is not working..I am really confused.
>
> Thank You all for your help & support!!!
>
> On Mon, Feb 9, 2009 at 7:29 AM, ALL From_NJ <all.from.nj@gmail.com> wrote:
>
>> 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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>>
>>
>> --
>> Andrew Lee Lissitz
>> all.from.nj@gmail.com
>>
>
>
>
> --
> KJ
> 

-- 
Andrew Lee Lissitz
all.from.nj@gmail.com

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

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