Solved

VLANs that assigned to different subnets

Posted on 2016-08-17
4
29 Views
Last Modified: 2016-08-22
I received an excel with list of VLANs that were matched with different subnets. For example,
vlan 10  - 192.168.10.0/24
vlan 11  - 192.168.30.0/24
vlan 12  - 192.168.50.0/24
vlan 13  - 192.168.100.0/24
But how can I verify if this information in Cisco switch? I tried different commands (show vlan, show interface trunk...etc.) but still could not find such info? could someone please help?
0
Comment
Question by:techy98
[X]
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
4 Comments
 
LVL 4

Assisted Solution

by:Steven Roman
Steven Roman earned 100 total points
ID: 41759570
Hello

The VLANS can be any number, they do not need to match but it is a good practice to follow if you can

show ip int brief will show the interfaces and IP
You may have SVI  (VLAN interface)  

sh int vlan10  or show running-config | sec interface Vlan10

Try that out

Also there may not be any SVI if you are uplinking to a Router.  The router may have sub interfaces and trunk ports  Example g0/0.10

Hope this helps

Thanks
0
 
LVL 12

Assisted Solution

by:Bryant Schaper
Bryant Schaper earned 100 total points
ID: 41759759
I would also say check the router, or layer 3 device, you can do a show ip int br, and a show run and look for the sub interfaces on a interface, they will have a dot1q associated vlan for example here what one of my routers shows:

interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
!
interface GigabitEthernet0/0.1
 encapsulation dot1Q 1 native
 ip address 192.168.2.1 255.255.255.0 secondary
 ip address 10.100.1.1 255.255.255.0
 ip helper-address 10.0.5.92
 ip nat inside
 ip virtual-reassembly in
!
interface GigabitEthernet0/0.2
 encapsulation dot1Q 2
 ip address 10.100.2.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly in
!
interface GigabitEthernet0/0.3
 description Security VLAN
 encapsulation dot1Q 3
 ip address 10.10.10.1 255.255.255.0 secondary
 ip address 10.100.3.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly in
!
interface GigabitEthernet0/0.4
 encapsulation dot1Q 4
 ip address 10.100.4.1 255.255.255.0
 ip helper-address 10.0.5.92
 ip nat inside
 ip virtual-reassembly in
!
interface GigabitEthernet0/0.5
 encapsulation dot1Q 5
 ip address 10.100.5.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly in

on the switch side I have


interface GigabitEthernet1/0/23
 description Uplink Router
 switchport mode trunk
!
interface GigabitEthernet1/0/24
 description Uplink PHXSW02
 switchport mode trunk
!
interface GigabitEthernet1/0/25
!
interface GigabitEthernet1/0/26
!
interface GigabitEthernet1/0/27
!
interface GigabitEthernet1/0/28
!
interface Vlan1
 ip address 10.100.1.5 255.255.255.0
!
interface Vlan2
 ip address 10.100.2.5 255.255.255.0
!
interface Vlan3
 ip address 10.100.3.5 255.255.255.0
!
interface Vlan4
 ip address 10.100.4.5 255.255.255.0
0
 
LVL 30

Accepted Solution

by:
Predrag earned 300 total points
ID: 41763381
The same thing as Steven Roman and Bryant Schaper wrote, but to extract only needed information.

# sh run | i interf|address|encaps
0
 

Author Closing Comment

by:techy98
ID: 41766369
thanks all. sh int bri worked fine but the command suggested by predrag was even able to see secondary ip assigned for a vlan
0

Featured Post

Technology Partners: 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

On Feb. 28, Amazon’s Simple Storage Service (S3) went down after an employee issued the wrong command during a debugging exercise. Among those affected were big names like Netflix, Spotify and Expedia.
Powerful tools can do wonders, but only in the right hands.  Nowhere is this more obvious than with the cloud.
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …
Suggested Courses
Course of the Month4 days, 18 hours left to enroll

636 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