Keep in mind, by default the switch will not tag the Native VLAN which is
VLAN 1 by default. You will need to adjust the configuration of the router
accordingly. See the following sample configuration for more details:
http://www.cisco.com/warp/customer/473/50.shtml
Sample Configuration: ISL/802.1Q Trunking Between a Catalyst 2900XL/3500XL
and a Cisco 2600 Router
--
Richard Froom
CCIE# 5102
[EMAIL PROTECTED]
919-392-2136
"Brian" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>
> with dot1q, I make my first vlan #2, I have had problems with vlan #1, it
> may be the way dot1q treats vlan #1 and what it expects to be in there.
>
> Brian
>
>
> On Tue, 20 Feb 2001, John Neiberger wrote:
>
> > I have a 2620 connected to a 2924XL using ISL trunking. Three VLANs
> > configured on both sides, VLAN 1 is the management VLAN. I can ping
> > from the router to the switch and vice versa.
> >
> > Now, I changed the encapulation type on both sides to dot1q and
> > communication breaks. Turning on debugging, I found the following
> > problem. Apparently, the 2620 is throwing out the ARP replies from the
> > switch. Here is the output from debup arp:
> >
> > 00:15:09: IP ARP: sent req src 10.16.102.70 0030.8546.b740,
> > dst 10.16.102.16 0000.0000.0000 FastEthernet0/0.1
> > 00:15:09: IP ARP: sent req src 10.16.102.70 0030.8546.b740,
> > dst 10.16.102.16 0000.0000.0000 FastEthernet0/0.1
> > 00:15:09: IP ARP rep filtered src 10.16.102.16 0005.3214.99c0, dst
> > 10.16.102.70
> > 0030.8546.b740 wrong cable, interface FastEthernet0/0
> > 00:15:09: IP ARP rep filtered src 10.16.102.16 0005.3214.99c0, dst
> > 10.16.102.70
> > 0030.8546.b740 wrong cable, interface FastEthernet0/0
> >
> > What the heck does wrong cable mean? The only potential problem I see
> > is that it is sending the ARP request out fa0/0.1, but receiving the
> > reply on fa0/0. Is there some configuration step that I'm missing?
> > I've never tried to configure dot1q before, but it seems to me that if
> > the native vlan is the same on both sides that the only configuration
> > difference would be the encapsulation type on each side.
> >
> > Can any of you provide any advice concerning this? And changing back
> > to ISL isn't going to solve my problem because I'm just playing around
> > and I want to make this work! :-)
> >
> > Thanks,
> > John
> >
> > _________________________________
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>
> -----------------------------------------------
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>
> Brian Feeny e:[EMAIL PROTECTED]
> CCNP+Voice/ATM/Security p:318.222.2638x109
> CCDP f:318.221.6612
> Network Administrator
> ShreveNet Inc. (ASN 11881)
>
> _________________________________
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