12-31-2017 04:46 PM - edited 07-05-2021 08:02 AM
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.
Solved! Go to Solution.
01-02-2018 07:07 PM
G1/0/24 of SW1 has right trunk port configuration, apply the same config on G1/0/25 of SW1 and G1/1/1 on SW2
G1/0/48 on SW2 has to be access port (if AP is local mode).
Hope that clears
Rasika
01-01-2018 04:45 PM
if you have CLI access to those switches, pls check SW1 & SW2 interconnection is up & trunk it properly.
#switchport mode trunk
HTH
Rasika
01-01-2018 04:51 PM - edited 01-01-2018 04:55 PM
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?
01-01-2018 04:53 PM
Have you interconnected SW1 & SW2 ? or are they connect to firewall directly ?
01-01-2018 04:59 PM - edited 01-01-2018 05:11 PM
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.
01-01-2018 05:52 PM
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.
01-02-2018 04:21 PM
01-02-2018 05:32 PM
01-01-2018 06:05 PM
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
01-02-2018 03:30 PM - edited 01-02-2018 03:32 PM
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.
01-02-2018 03:46 PM
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
01-02-2018 04:03 PM - edited 01-02-2018 04:05 PM
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.
01-02-2018 04:07 PM
Yes, it seems vlan 2 is not there in SW2.
01-02-2018 04:13 PM
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.
01-02-2018 04:20 PM
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