From: Pavel Bykov (slidersv@gmail.com)
Date: Fri Feb 27 2009 - 09:26:42 ARST
VTP runs in VLAN1, which is not prunnable or removable. Even when you remove
it administratively from the trunk, in reality it will still be operational.
What is required by vtp is the same domain name and password. If they match
then all modes forward messages.
On Fri, Feb 27, 2009 at 10:18 AM, Daniel Kutchin <daniel@kutchin.com> wrote:
> Naveen -
>
> For VTP information to be propagated by SW4,
> following conditions should be met:
>
> 1. Domain names must match on all Switches
> 2. Disable Pruning on SW4 (not quite sure of this)
> 2. SW4 can be in Transparent mode
>
> Debugging will be useful here: "debug sw-vlan vtp events"
>
> Also view this Video (you need a CCO Account)
> http://www.cisco.com/warp/customer/473/vtp_flash/
>
>
>
> -
> Daniel
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> naveen M S
> Sent: Freitag, 27. Februar 2009 09:08
> To: Cisco certification
> Subject: Re: VTP Issue
>
> Folks,
>
> Here is complete results of my experiments. Hope this benefits you.
>
> SW1-------SW4--------SW2
>
> X,Y,Z = Domain,Mode,Ver
> Mode 'Any' = client or server or transparent
>
> *Case-1)*
> cisco,Server,2 -------- cisco,Any,2 --------- cisco,Client,2
>
> *Result:*
> Any vlan changes on SW1 is propogated to SW4 and SW2
> Note that when both SW1 and SW4 are VTP servers, changes
> on one server is updated by other server. Also, SW4 does't
> update Vlan changes while in Transparent mode.
>
>
> *Case-2)*
> cisco,Server,2 -------- iewb,Any,2 ---------- cisco,Client,2
>
> *Result:*
> Any vlan changes on SW1 is NOT propogated to SW4 and SW2
>
>
> *Case-3)*
> cisco,Server,1 -------- cisco,Any,1 --------- cisco,Client,1
>
> *Result:*
> Any vlan changes on SW1 is propogated to SW4 and SW2
> Note that when both SW1 and SW4 are VTP servers, changes
> on one server is updated by other server. Also, SW4 does't
> update Vlan changes while in Transparent mode.
>
>
> *Case-4)*
> cisco,Server,2 -------- iewb,Any,2 ---------- cisco,Client,2
>
> *Result:*
> Any vlan changes on SW1 is NOT propogated to SW4 and SW2
>
>
> What bothers me is that how to get VTP updates from SW1 to SW2 ?
> My task doesn't allow me to do Q-in-Q or L2protocol tunnelling.
>
> All ideas are welcome.
> Naveen.
>
>
> On Thu, Feb 26, 2009 at 11:05 PM, naveen M S <navin.ms@gmail.com> wrote:
>
> > Yes. This is VTP version 2.
> >
> >
> >
> > On Thu, Feb 26, 2009 at 10:58 PM, joshua atterbury <
> > joshuaatterbury@gmail.com> wrote:
> >
> >>
> >> are you using vtp version 2?
> >>
> >> On Fri, Feb 27, 2009 at 5:55 PM, naveen M S <navin.ms@gmail.com> wrote:
> >>
> >>> Folks,
> >>>
> >>> Here is my scenario. Seems trivial but can't get it to work.
> >>>
> >>> SW1-------SW4-------SW2
> >>>
> >>> SW1 : VTP domain = cisco, Mode = server
> >>> SW2 : VTP domain = cisco, Mode = client
> >>> SW4 : VTP domain = iewb, Mode = server
> >>>
> >>> The 802.1q trunk links are established b/n the 3 switches and vlan 1 is
> >>> native on them.
> >>>
> >>> Changes to vlan in SW1 are NOT propogated to SW2. What could be the
> >>> problem
> >>> ?
> >>>
> >>> *SW1:*
> >>> interface GigabitEthernet1/0/20
> >>> switchport trunk encapsulation dot1q
> >>> switchport mode trunk
> >>> switchport nonegotiate
> >>>
> >>> *SW4:*
> >>> interface GigabitEthernet1/0/14
> >>> switchport trunk encapsulation dot1q
> >>> switchport mode trunk
> >>> switchport nonegotiate
> >>> !
> >>> interface GigabitEthernet1/0/16
> >>> switchport trunk encapsulation dot1q
> >>> switchport mode trunk
> >>> switchport nonegotiate
> >>>
> >>> *SW2:*
> >>> interface GigabitEthernet1/0/19
> >>> switchport trunk encapsulation dot1q
> >>> switchport mode trunk
> >>> switchport nonegotiate
> >>>
> >>> Rack1SW1# sh int trunk
> >>>
> >>> Port Mode Encapsulation Status Native vlan
> >>> Gi1/0/20 on 802.1q trunking 1
> >>>
> >>> Rack1SW4# show int trunk
> >>>
> >>> Port Mode Encapsulation Status Native vlan
> >>> Gi1/0/14 on 802.1q trunking 1
> >>> Gi1/0/16 on 802.1q trunking 1
> >>>
> >>> Rack1SW2# sh int trunk
> >>>
> >>> Port Mode Encapsulation Status Native vlan
> >>> Gi1/0/19 on 802.1q trunking 1
> >>>
> >>>
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>
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>
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>
>
>
>
>
>
>
-- Pavel Bykov ---------------- Don't forget to help stopping the braindumps, use of which reduces value of your certifications. Sign the petition at http://www.stopbraindumps.com/Blogs and organic groups at http://www.ccie.net
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