From: ccie2be (ccie2be@nyc.rr.com)
Date: Tue Sep 30 2003 - 14:12:57 GMT-3
Scott,
Thanks for the clarification.
So, now I'm thinking the following:
Given those 2 commands are configured on a port,
the port will go into trunk mode if it can,
but if it can not, in will be in vlan 64.
And, if it's in trunk mode and then trunk mode fails,
the port will become an access port in the configured vlan (true?)
Thanks, dt
----- Original Message -----
From: "Scott Morris" <swm@emanon.com>
To: "'ccie2be'" <ccie2be@nyc.rr.com>; "'Group Study'"
<ccielab@groupstudy.com>
Sent: Tuesday, September 30, 2003 12:21 PM
Subject: RE: Native-VLAN vs. Switchport Access VLAN
> Niether of them will do anything until the switch decides what "mode"
> the port is in. By default, you are in a dynamic mode which means you
> may be a trunk or you may not.
>
> With these two commands, if you are a trunk, you'll use dot1q. If you
> aren't a trunk you'll run on vlan 64 in access mode.
>
> So no, they are not mutually exclusive from a configuration standpoint,
> just from an "at-the-moment" operation standpoint.
>
> HTH,
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
> CISSP, JNCIS, et al.
> IPExpert CCIE Program Manager
> IPExpert Sr. Technical Instructor
> swm@emanon.com/smorris@ipexpert.net
> http://www.ipexpert.net
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> ccie2be
> Sent: Tuesday, September 30, 2003 12:08 PM
> To: Group Study
> Subject: Fw: Native-VLAN vs. Switchport Access VLAN
>
>
> Hi,
>
> In the config below, aren't these 2 commands:
>
> switchport access vlan 64
> switchport trunk encapsulation dot1q
>
> contradictory and mutually exclusive? It seems to me that a port is
> either a trunk or access port. There are some other posts from Scott
> Morris on this topic as well which should also be looked at.
>
> Also, considering the 2 commands above, does the order in which the
> commands are entered make any difference in how the port behaves?
>
> Thanks, dt
>
>
> ----- Original Message -----
> From: "MADMAN" <dmadlan@qwest.com>
> To: "Kenneth Wygand" <KWygand@customonline.com>
> Cc: <ccielab@groupstudy.com>
> Sent: Tuesday, September 30, 2003 10:46 AM
> Subject: Re: Native-VLAN vs. Switchport Access VLAN
>
>
> > This issue, posed differantly, was asked the other day. You
> > configure your trunk with the access vlan also configured as your
> > backup:
> >
> > interface GigabitEthernet1/1
> > no ip address
> > no logging event link-status
> > switchport
> > switchport access vlan 64
> > switchport trunk encapsulation dot1q
> >
> > substitute 568 for 64.
> >
> > Dave
> >
> >
> > Kenneth Wygand wrote:
> >
> > > Hello group,
> > >
> > >
> > >
> > > I have two (2) 3550's with an ISL trunk between them on
> > > FastEthernet0/10 (both sides).
> > >
> > >
> > >
> > > I have a practice lab question that states "If the trunk
> > > encapsulation should fail, ensure that VLAN 568 is still forwarded
> > > across the link".
> > >
> > >
> > >
> > > My thought was to set the trunk mode to DESIRABLE on both sides and
> > > include a "switchport access vlan 568" command on the interface in
> > > the case when the trunk does not establish. However, the answer key
>
> > > states that the trunk is nailed down on both sides (switchport mode
> > > trunk) and the native-vlan is set to 568 on both sides (switchport
> > > trunk native vlan 568).
> > >
> > >
> > >
> > > Which is right, or do both answers satisfy the requirements?
> > >
> > >
> > >
> > > If these yield different results and a question like this is asked
> > > on the lab exam, what question could we ask of the proctor to
> > > determine which configuration is correct?
> > >
> > >
> > >
> > > Thanks,
> > >
> > >
> > >
> > > Kenneth E. Wygand
> > > Systems Engineer, Project Services
> > >
> > > CISSP #37102, CCNP, CCDP, MCP 2000, CNA 5.1, Network+, A+ Custom
> > > Computer Specialists, Inc. 70 Suffolk Court
> > > Hauppauge, NY 11788
> > > (631) 864-6699 x1755
> > >
> > > "It's not just about ending up where you want to be, it's about
> > > making the most of the trip there." -Anonymous
> > >
> > > ***Get your CCIE and a FREE vacation: Shop.GroupStudy.com***
> > > ____________________________________________________________________
> > > ___
> > > Please help support GroupStudy by purchasing your study materials
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> > >
> >
> > --
> > David Madland
> > CCIE# 2016
> > Sr. Network Engineer
> > Qwest Communications
> > 612-664-3367
> >
> > "Emotion should reflect reason not guide it"
> >
> > ***Get your CCIE and a FREE vacation: Shop.GroupStudy.com***
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