From: Gary Braver (gbraver@fastlanenetworks.com)
Date: Wed Feb 18 2009 - 20:42:19 ARST
So some features require VTP to be in transparent mode?
I also did not think there were any functional differences between VTP V1
and V2 with the exception of token ring support with V2 (showing how long I
have been doing this).
Gary
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of ALL
From_NJ
Sent: Tuesday, February 17, 2009 10:11 PM
To: NET HE
Cc: mashaker@gmail.com; ccielab@groupstudy.com
Subject: Re: VTP question
Hey Team,
I think an interesting aspect of vtp transparent is that, once it is
configured, the local 'auto-magic' sharing of VLAN information is no more,
from a lab perspective, it is important to know which features require vtp
transparent mode, and what this will do for your lab; RSPAN being the first
feature comes to mind.
A switch configured in VTP transparent mode will pass other switch's VTP
advertisements (will not block them)... , it will not break the
advertisements between other switches but will not pass it's own VTP
updates. In addition, it will not listen to other switch's vtp
advertisements.
It is transparent ... you can see though it! ;-))
A link to help (watch the ugly word wrap):
http://www.cisco.com/en/US/docs/ios/lanswitch/command/reference/lsw_u1.html#
wp1013958
From this link:
The* vtp transparent *command disables VTP from the domain but does not
remove the domain from the switch.
If the receiving switch is in transparent mode, the configuration is not
changed. Switches in transparent mode do not participate in VTP. If you make
VTP or VLAN configuration changes on a switch in transparent mode, the
changes are not propagated to the other switches in the network.
The *vtp server* command is similar to the *no vtp transparent *command,
except that it does not return an error if the device is not in transparent
mode.
HTH,
Andrew Lee Lissitz
On Tue, Feb 17, 2009 at 9:36 PM, NET HE <he_net@hotmail.com> wrote:
> -VTP version 1, transparent sw doesn't forward vtp message at all.
>
> -VTP version 2, transparent sw forwards vtp message if the transparent sw
> is
> in the same domain as vtp server
>
> So in your case, they are running version 2 and in the same domain, sw2
> should
> forward VTP message to SW3.
> Best Regards, Net (Xin) He Best Regards, Net (Xin) He > Date: Tue, 17 Feb
> 2009
> 22:45:40 +0200> Subject: VTP question> From: mashaker@gmail.com> To:
> ccielab@groupstudy.com> > Hello> > really i am confused if vtp mode
> transparnet forward the VTP message or not> even if it has the same domain
> and
> version 2> i made a lab for that and i t didnt work> > Server (domain
CCIE)
> transparent (domain> CCIE) clien (Domain CCIE)> SW1
> ------------------------------------------------>SW2>
> ------------------------------------------------>SW3> > i dont know if i
am
> wrong or not> is the only solution is to configure layer 2 tunneling
> between
> SW1 and SW3> to bypass SW2> > > Blogs and organic groups at
> http://www.ccie.net> >
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-- Andrew Lee Lissitz all.from.nj@gmail.comBlogs and organic groups at http://www.ccie.net
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