Vlan Configuration

[dcgtechnologies]

Hello, I am new to the forum and I am in the process configuring a VLAN from switch1 to switch2. The Vlan is connected to Switch 1 on port Gi1/0/1 and I had it configured with my old Cisco Aironet AP on port Gi1/0/24 and it worked great. But now I have bought a Cisco 3750X switch which we can call switch 2. I am putting my new Cisco Aironet AP on port Gi1/0/48 on Switch 2 and it is not working at all and from what I can see I am missing the port for the VLAN 2 I would need to add to get it to work properly. When I plug it back in to port Gi1/0/24 it works great as they are on the same switch, but when I go to port Gi1/0/48 on Switch 2 it does not work at all. Can someone please help me on the solution to this? I am thinking I might need to trunk the uplink ports but I am not sure as everything I have on VLAN1 works perfectly. Any ideas? Thank you.

[Rasika Nayanajith]

if you have CLI access to those switches, pls check SW1 & SW2 interconnection is up & trunk it properly.

#switchport mode trunk

HTH

Rasika

[dcgtechnologies]

Which port do I need to run it on? The VLAN is on my firewall and goes through Gi1/0/1 on Swich1 and on Switch 2 the port I want to use is Gi/1/0/48. Since they are on two different switches. The interconnectivity is up and running just fine? I show the default Vlan 1 communicating just fine when I have the Access Port on Vlan 1, but Vlan 2 on the Access Point is not working correctly. How would they need to be configured?

[Rasika Nayanajith]

Have you interconnected SW1 & SW2 ? or are they connect to firewall directly ?

[dcgtechnologies]

The interconnectivity is up and running just fine between both switches and only switch 1 is connected to the firewall, but keep in mind Switch 1 and Switch 2 have interconnectivity on port Gi1/1/1 and Gi1/0/25 using a Fiber interconnect cable. The Vlan 2 is setup up to give out DHCP using a VLAN setup on my firewall which is ran through Switch 1 on port Gi1/0/1. When I connect it to port Gi1/0/24 is Vlan 1 and 2 work fine. I show the default Vlan 1 communicating just fine when I have the Access Point on on Switch 2 on port Gi1/0/48, but Vlan 2 on the Access Point is not working correctly and there are no ports assigned. See config below for VLAN 2 on Switch 2:
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
2 VLAN  active

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
2 enet 100002 1500 - - - - - 0 0

Remote SPAN VLAN
----------------
Disabled

Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
Any ideas? Thanks.

[Scott Fella]

Make sure you have a trunk port configuredlowing the vlans between switch 1 and switch 2. If the issue is broke between the two switches, you can easily figure that out by setting up a port on switch 2 for vlan 2 and connect a laptop to it and see if the laptop gets an ip and has connectivity out. 

[dcgtechnologies]

How could I configure this? Do you have the commands to perform this action? Thank you.

[dcgtechnologies]

Here is the output I get when trying to configure the trunk on SW2:

SW2#show interfaces GigabitEthernet 1/0/48 trunk

Port Mode Encapsulation Status Native vlan
Gi1/0/48 auto 802.1q other 1

Port Vlans allowed on trunk
Gi1/0/48 none

Port Vlans allowed and active in management domain
Gi1/0/48 none

Port Vlans in spanning tree forwarding state and not pruned
Gi1/0/48 none
SW2#

I have used the switchport command over and over with no such luck.

[Rasika Nayanajith]

Have you defined vlan 2 on SW2 ? If not define that first.

When your AP is plugged on G1/0/48 on SW2 & it is powered, pls issue "show span vlan 2" on SW2 and provide us the output.

HTH

Rasika

[dcgtechnologies]

Yes it is powered up and running great. Like I said VLAN 1 is working just fine on the AP. The results for VLAN 2 on Switch 2 for spanning tree are below:

show span vlan 2

Spanning tree instance(s) for vlan 2 does not exist.
How do I enable this? Thank you.

[Rasika Nayanajith]

Define the L2 vlan on SW2 first.

SW2

#vlan 2

#exit

Then issue "show span vlan 2" & ensure SW1 connected port appear as root port for vlan 2.

HTH

Rasika

[dcgtechnologies]

Are you saying that Vlan 2 does not exist on Switch 2? How would I define the port for Switch 1 on Switch 2? I am confused. Sorry forgive my ignorance.

[Rasika Nayanajith]

Yes, it seems vlan 2 is not there in SW2.

[dcgtechnologies]

when I perform a show vlan ID 2 I get results. See below:

SW2#show vlan id 2

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
2    VLAN      active

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
2    enet  100002     1500  -      -      -        -    -        0      0

Remote SPAN VLAN
----------------
Disabled

Primary Secondary Type              Ports
------- --------- ----------------- ------------------------------------------

SW2# show span vlan 2

Spanning tree instance doe vlan 2 does not exist.

When I show the vlan is 2 I see the Vlan there, but there is no port associated with it. Thank you.

[dcgtechnologies]

See output from show vlan on Sw2:
SW2#show vlan

VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Gi1/0/1, Gi1/0/2, Gi1/0/3
Gi1/0/4, Gi1/0/5, Gi1/0/6
Gi1/0/7, Gi1/0/8, Gi1/0/9
Gi1/0/10, Gi1/0/11, Gi1/0/12
Gi1/0/13, Gi1/0/14, Gi1/0/15
Gi1/0/16, Gi1/0/17, Gi1/0/18
Gi1/0/19, Gi1/0/20, Gi1/0/21
Gi1/0/22, Gi1/0/23, Gi1/0/24
Gi1/0/25, Gi1/0/26, Gi1/0/27
Gi1/0/28, Gi1/0/29, Gi1/0/30
Gi1/0/31, Gi1/0/32, Gi1/0/33
Gi1/0/34, Gi1/0/35, Gi1/0/36
Gi1/0/37, Gi1/0/38, Gi1/0/39
Gi1/0/40, Gi1/0/41, Gi1/0/42
Gi1/0/43, Gi1/0/44, Gi1/0/45
Gi1/0/46, Gi1/0/47, Gi1/0/48
Gi1/1/1, Gi1/1/2, Gi1/1/3
Gi1/1/4
2 VLAN 2 active
3 VLAN 3 active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
2 enet 100002 1500 - - - - - 0 0
3 enet 100003 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
1003 tr 101003 1500 - - - - - 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
1005 trnet 101005 1500 - - - ibm - 0 0

Remote SPAN VLANs
------------------------------------------------------------------------------


Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
From what I see here they are there. What am I missing here? Thank you :)