cicso Switch. Cannot see all the vlans

Posted on 2010-11-08
Last Modified: 2012-06-21
hi am working on two switches. they have same config
on the first i have
interface GigabitEthernet1/0/1
 description UPLINK TO HOUSW01
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 123
 switchport trunk allowed vlan 1,4,8,24,40,44,55,123,155,200,240
 switchport mode trunk

and then when i sh run i see

vlan internal allocation policy ascending
vlan 4
 name Printers
vlan 8
 name DSL_VLAN
vlan 24
vlan 40
vlan 123

i am missing some vlans.
One the other switch i can see all the vlans. What am i missing ?
Question by:c_hockland
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
LVL 79

Accepted Solution

lrmoore earned 167 total points
ID: 34089996
Are you using VTP between them?
I recommend that one switch be set as VTP client mode, set a VTP domain on both, and only define the VLAN's on the VTP server.

It is this simple:
On client switch:
vtp mode client
vtp domain DOMAIN

On server switch (server mode enabled by default)
vtp domain DOMAIN


Author Comment

ID: 34090007
both switches are in vtp mode transparent

shall i change this ?

Author Comment

ID: 34090014
actually here is what i have

vtp domain Houston
vtp mode transparent
Forrester Webinar: xMatters Delivers 261% ROI

Guest speaker Dean Davison, Forrester Principal Consultant, explains how a Fortune 500 communication company using xMatters found these results: Achieved a 261% ROI, Experienced $753,280 in net present value benefits over 3 years and Reduced MTTR by 91% for tier 1 incidents.


Expert Comment

ID: 34090559
You might not have created VLAN on this switch...when you do show vlan on this switch..what do you get??
LVL 14

Assisted Solution

Otto_N earned 167 total points
ID: 34091168
I'd suggest that you change the VTP mode to client/server, as lrmoore suggested.  Then, if you configure a vlan on the VTP server, the client will automatically update his vlan table with the new vlan.

Just be carefull, as all the vlans that has been configured on the client might be overwritten (deleted), so please make sure that your proposed server have all the vlans you need for your architecture.

There are some instances where you would need to run vtp in transparent mode (such as if you configure private vlans).  If you keep the switches in transparent mode, you will have to manually configure all vlans on both switches (i.e copy all the "vlan x..." commands to the other switch as well.
LVL 50

Assisted Solution

by:Don Johnston
Don Johnston earned 166 total points
ID: 34092694
Personally, I'd leave it in transparent mode and simply create the VLANs that you're missing.

But that's me...
LVL 17

Expert Comment

ID: 34094710
Also make sure the domain is exactly the same Houston and houston are different.  The domains are case sensitive.

Author Closing Comment

ID: 34184621
yes we left it transparent and we created the Vlans. I talked to the CCIE guy in chicago and thats what we did. I was wondering why though.
Anyway , thanks all

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Router Question 12 75
Receiving wifi on an underground station 22 130
Stack 2x HP ProCurve 5406zl Switches 9 19
Password recovery 2960S 4 36
Getting hacked is no longer a matter or "if you get hacked" — the 2016 cyber threat landscape is now titled "when you get hacked." When it happens — will you be proactive, or reactive?
I recently attended Cisco Live! in Las Vegas, a conference that boasted over 28,000 techies in attendance, and a week of hands-on learning hosted by a solid partner with which Concerto goes to market.  Every year, Cisco displays cutting-edge technol…
After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

730 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question