----- Original Message -----
From: "simon watson"
To: ; "Henrique Issamu Terada"
Sent: Wednesday, July 02, 2003 11:08 PM
Subject: VLAN Tagging on Cat 3550 Another question [7:71703]
> Hi
>
> Some how I was thinking VLAN tagging was something more than just
"Trunking"
> in Cisco talk,as you can guess I'm pretty rusty when it comes to
switching.I
> have another question.Look at the example below.
>
>
> REMOTE SITE
>
>
> PC's-----CISCO 3550----------CISCO 2600~~(256K LEASE LINE)
(VLAN3) (802.1q TRUNK)
MAIN SITE
~~~~~~CISCO 3600----ALCATEL SWITCH............PIX...INTERNET
ROUTER/INTERNET.
(256K LINK) (802.1qTRUNK) (VLAN3)
>
>
> A client wants to allow a group of PC's on a remote site, access to the
> internet via the main site's ISP.But wants these group of Pc's on their
own
> VLAN so they have no connection to the rest of the network (except for the
> internet router which the whole network uses to access the internet) they
> have been advised by a third party to do it as above.They have a Cisco
> 3550EMI switch at the remote site & a Alcatel Omnicore L3 switch at the
Main
> site.The WAN link is a 256k lease line.They want to configure the PC's on
> the remote site with the same VLAN as a dedicated PIX on the Main site
(also
> on the same subnet).
>
> The Cat 3550 is not using it's L3 capabilities and is trunked to the
remote
> site's router
>
> Can this be done ?????????
>
>
> I'm sure thinking of the basic laws of routing it won't be possible to
have
> devices being on the same subnet but across different WAN links, as
routing
> loops can occur.Also would it be best to enable the layer 3 capabilities
of
> the switches, or to let the routers do the work.
>
> I'm looking forward to your answers
>
>
> Thanks in advance
>
> Simon.
>
>
>
>
>
>
>
>
>
>
>
> ----- Original Message -----
> From: "Henrique Issamu Terada"
> To: "simon watson"
> Cc:
> Sent: Tuesday, July 01, 2003 2:09 PM
> Subject: RES: VLAN Tagging on Cat 3550 [7:71703]
>
>
> Vlan tagging is commonly called by Cisco as trunks.
> Have you ever configured trunks as ISL ou 802.1q ?
> Actually the name vlan tagging makes more sense on non Cisco equipment,
> where only exists 802.1q .
> ISL doesn't do tag as 802.1q , but reencapsulates the packet with a new
> header .
>
> My 0,02
>
> > _____________________________________
> > Henrique Issamu Terada, CCIE # 7460
> > IT Support - Open Network
> > CPM S.A. - Tecnologia criando valor
> > Tel.: 55 11 4196-0710
> > Fax: 55 11 4196-0900
> > [EMAIL PROTECTED]
> > www.cpm.com.br
>
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> > -----Mensagem original-----
> > De: simon watson [SMTP:[EMAIL PROTECTED]
> > Enviada em: terga-feira, 1 de julho de 2003 05:02
> > Para: [EMAIL PROTECTED]
> > Assunto: VLAN Tagging on Cat 3550 [7:71703]
> >
> > Hi Guys
> >
> > A client wants a Cat 3550 configured for VLAN tagging, I have not done
one
> > of these before so how do I configure the switch, also there is a Cisco
> > 2600
> > router also connected to the switch.Do I need to configure the router to
> > accomodate VLAN tagging (and any router that packets of the VLAN goes
> > through ?)
> >
> > Thanks
> >
> > Simon.
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