From: Adam Crisp (adam.crisp@totalise.co.uk)
Date: Mon Oct 14 2002 - 09:16:39 GMT-3
2621'S DO SUPPORT ISL:
Router6(config)#int fast 0/0.100
Router6(config-subif)#en
Router6(config-subif)#encapsulation isl 100
Router6(config-subif)#encapsulation ?
dot1Q IEEE 802.1Q Virtual LAN
isl Inter Switch Link - Virtual LAN encapsulation
sde IEEE 802.10 Virtual LAN - Secure Data Exchange
tr-isl Token Ring Inter Switch Link - Virtual LAN encapsulation
Router6(config-subif)#encapsulation
interface FastEthernet0/0.100
encapsulation isl 100
no ip redirects
end
Router6#show ver
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-JS-M), Version 12.2(7c), RELEASE SOFTWARE
(fc1)
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Fri 10-May-02 22:10 by pwade ...
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Zahrt, Frank
Sent: 14 October 2002 12:42
To: 'Hansang Bae'; ccielab@groupstudy.com
Subject: RE: ISL Platform ? No Speculation
<< The 2600's absolutely do not support ISL - only dot1q. >>
I fairly certain the 2620 and above support both ISL and dot1q. It's the
1751,1721, etc that only support dot1q. Here's a link:
http://www.cisco.com/en/US/tech/tk389/tk390/technologies_configuration_examp
le09186a00800949fd.shtml
Of course, you need IP PLUS to make it work, but at least the router is
capable of it.
Regards,
Frank
Frank Zahrt III
CCDP, CCNP Voice Specialist, CCSE, FSCE
NEC Senior Network Engineer
-----Original Message-----
From: Hansang Bae [mailto:hbae@nyc.rr.com]
Sent: Monday, October 14, 2002 1:53 AM
To: ccielab@groupstudy.com
Subject: Re: ISL Platform ? No Speculation
At 08:32 PM 10/13/2002 -0700, Kip Palmer wrote:
>Howdy all-
> Need to know, absolute answers only.
> I'm upgrading "The Rack" for ISL trunking and need to
>know from first hand experience which router models DO
>support the ISL trunking w/ the FE.x.
>
>I read a recent post that the 3620 was the starting point,
>but have heard that 1760, and I don't see why the 2620/21
>series would not support this feature.
> Anybody currently using the 1760, 2620/21 for this model?
The 2600's absolutely do not support ISL - only dot1q. Why not run it
through the feature navigator to get an idea of what's what? FN isn't
perfect, but it will help you narrow things down.
Also, ISL is on its way out. Trunking is trunking. In terms of configuring
a trunk, there's very little differnce. Why bother with ISL if you can do
dot1q today?
hsb
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