From: MADMAN (dmadlan@qwest.com)
Date: Tue Sep 30 2003 - 11:46:30 GMT-3
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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