We ran into a similar problem on a recent project. I think the confusion
comes when you try to address the GigE ports of the L3 card as "switch
ports" instead of from the router configuration. When you try to SET TRUNK
2/1... only dot1q will show up. If you session into the L3 router, then
ISL is available.
Another bigger issue is the two "virtual" gig interfaces to the backplane.
The L3 modules uses these to pass traffic to the rest of the switch. We
wound up having to setup bridge groups for the VLANs from these interfaces
to physical interfaces. It seems kind of hokey at the time. Does anyone
know of a better way for future reference?
Thanks.
--
When I disagree with a rational man, I let reality be our final arbiter; If
I am right, he will learn, If I am wrong, I will; one of us will win, but
both of us will profit.
- John Galt
"Chris McCoy" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>
> Mr. Biel,
>
> According to CCO,
> http://www.cisco.com/univercd/cc/td/doc/pcat/ca4000.htm#xtocid58994,
> the L3 module supports ISL on the uplink interfaces.
> Those are GigabitEthernet 1 & 2 when configuring the
> module.
>
> Ex:
>
> interface GigabitEthernet 1
> no ip address
> no ip directed-broadcast
> no negotiation auto
> !
> interface GigabitEthernet 1.10
> encapsulation isl 10 ! VLAN 10
> bridge-group 10
> !
> interface GigabitEthernet 3
> no ip address
> no ip directed-broadcast
> no negotiation auto
> channel-group 1
> !
> interface GigabitEthernet 4
> no ip address
> no ip directed-broadcast
> no negotiation auto
> channel-group 1
> !
> interface Port-channel 1
> no ip address
> no ip directed-broadcast
> no negotiation auto
> !
> interface Port-channel 1.10
> encapsulation dot1q 10 ! VLAN 10
> no ip address
> no ip directed-broadcast
> no negotiation auto
> bridge-group 10
>
> bridge 10 protocol ieee
>
> Chris M.
>
> --- John Biel <[EMAIL PROTECTED]> wrote:
> > As I mentioned in my previous post there is a
> > WS-X4232-L3 module in this
> > switch.
> > However the option to do isl trunking does not
> > appear to be there.
> >
> > <[EMAIL PROTECTED]> wrote in message
> >
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > By default cat 4000 support only 802.1q. If you
> > need isl, you should by
> > > interface that have Layer 3 support like
> > WS-X4232-L3. Price is about 15K.
> > > Sidleen
> > > Network Consultant
> > > Datacraft (Thailand) Ltd.
> > >
> > > > -----Original Message-----
> > > > From: Craig E. Smith
> > [SMTP:[EMAIL PROTECTED]]
> > > > Sent: 15 ธันวาคม 2000 21:10
> > > > To: [EMAIL PROTECTED]
> > > > Subject: 4000 catalyst, where isl
> > > >
> > > > why does the catalyst 4000 not support isl?
> > > >
> > > >
> > > > Craig E. Smith
> > > > Network Engineer
> > > >
> > > > _________________________________
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> >
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