From: Nate Kleven (cciemail@intellinet.ws)
Date: Wed Nov 13 2002 - 13:14:12 GMT-3
You might want to point out the fact that ISL is a Cisco proprietary
encapsulation, and as Scott said, Cisco is even moving away from it.
Furthermore, 802.1q is an industry standard, widely supported encapsulation
method. Does this customer have any plans to deploy IP Telephony on his/her
network? If the answer is yes, then you can point out that 802.1q is the
only option on many platforms for seperating voice and data VLANs on a
single cable to the phone.
HTH
__________
Nate Kleven
Senior Network Engineer, CCNP Voice Access, MCSE
Expanets
6020 So 190th ST
Kent, WA 98032
(206)219.6135
"Experienced at Networked Solutions"
-----Original Message-----
From: Scott Hoover [mailto:dizzy74_98@yahoo.com]
Sent: Wednesday, November 13, 2002 6:03 AM
To: Hedi Abdelkafi; GroupStudy (E-mail)
Subject: Re: FW: ISL and Dot1q Trunk
Cisco (been discussed at Networkers for the last 2
years) has made no secret of the fact that they are
going entirely away from ISL. That's probably the
reason why you are only seeing dot1q for the 10G
interfaces. I would simply tell your customer that
Cisco is going entirely over to dot1q in the near
future. Also, for troubleshooting purposes it is
easier to know that every trunk is using the same
encap.. If all else fails, give the customer what he wants---he is paying
your check.
HTH,
Scott
CCIE #9340
--- Hedi Abdelkafi <Hedi.Abdelk@simac.lu> wrote:
> > Hi,
> >
> > I have to setup a new network with Cat6k (with 10
> Ge interface) and Cat3550.
> > ISL encapsulation is not supported on 10 GE
> interface so we have to use Dot1Q encapsualtion on
> that kind of link.
> >
> > The customer wants to use both encapsulation mode
> (ISL on Gigabit and Dot1q on 10 GE).
> > I prefer to use only Dot1Q accross the whole
> network.
> >
> > What argument can I give in order so setup this
> new network with only one encapsulation method ?
> > Does someone have a bad experience when mixing
> both ?
> >
> > PS : I have already said to the customer that some
> device (Cat2950 if I'm wrong) support only Dot1q. He
> told me that the only device that will be used are
> cat 3550 !
> >
> > Any idea or documentation is welcome !
> >
> > Thanks for your help.
> >
> > Bye
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