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
MAIN SITE
PC's-----CISCO 3550--------CISCO 2600~~~~~~CISCO 3600--------ALCATEL L3
SWITCH..............PIX...INTERNET ROUTER---INTERNET.
(VLAN3) (802.1q TRUNK) (256K LINK) (802.1q
TRUNK) (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
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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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