From: Gary Duncanson (gary.duncanson@googlemail.com)
Date: Mon Oct 29 2007 - 08:02:34 ART
Shiran is quite right.
Add the vlan to all transparent switches in the path.
Rgds
Gary
----- Original Message -----
From: "shiran guez" <shiranp3@gmail.com>
To: <hadek.el-ayachi@nsn.com>
Cc: <ccielab@groupstudy.com>
Sent: Monday, October 29, 2007 10:45 AM
Subject: Re: Vlans configured in which switches
>I will answer that with an example:
>
> R1 connected to SW1 port F0/1
> R4 connected to SW4 port F0/4
>
> both are in vlan 14
>
> SW1 have a trunk to SW2
> SW2 have a trunk to SW3
> SW3 have a trunk to SW4
>
> so the vlan path to get from R1 to R4 is SW1 -> SW2 -> SW3 -> SW4
>
> If you will create vlan 14 only on SW1 and SW4 you will not have a layer 2
> connectivity witch will cause you not able to communicate.
>
> So to solve this case you need to Add vlan 14 to all the Switches in the
> Path.
>
> If you had R4 connected on SW3 port F0/4 then you did not need to add vlan
> 14 on SW4 as he is not in your vlan Path.
>
> also you can trouble shoot if you need to add the vlan or not using
> spanning
> tree
>
> show span vla <#>
>
> if you looked to the out put on SW2 and SW3 without adding the vlan to the
> Switch you would not have a spanning tree enabled for the vlan as due to
> that also no vlan communication.
>
>
>
>
> On 10/29/07, hadek.el-ayachi@nsn.com <hadek.el-ayachi@nsn.com> wrote:
>>
>> Hi Experts,
>> In many cases, we have some set of vlans per switch with some
>> overlappings between switches.
>> When using transparent and different vtp domains, must I configure all
>> vlans in all switches or configure just necessary vlans per switch (i.e:
>> active vlans)?
>> Thanks for comments
>>
>>
>> E. HADEK
>> Nokia Siemens Networks
>> IP Core planner
>> 5 rue Abou Inane- Hassan
>> Rabat - Maroc
>> Tel : +212 37 26 15 30
>> GSM : + 212 61 44 93 98
>>
>> _______________________________________________________________________
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>> http://www.groupstudy.com/list/CCIELab.html
>>
>
>
>
> --
> Shiran Guez
> MCSE CCNP NCE1
> http://cciep3.blogspot.com
> http://www.linkedin.com/in/cciep3
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
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