From: ccie2be (ccie2be@nyc.rr.com)
Date: Tue Sep 30 2003 - 13:07:31 GMT-3
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
> >
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> >
>
> --
> David Madland
> CCIE# 2016
> Sr. Network Engineer
> Qwest Communications
> 612-664-3367
>
> "Emotion should reflect reason not guide it"
>
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