topic Re: Vlan Configuration in Wireless

Vlan Configuration

dcgtechnologies — Mon, 05 Jul 2021 15:02:17 GMT

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.

Re: Vlan Configuration

Rasika Nayanajith — Tue, 02 Jan 2018 00:45:30 GMT

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

#switchport mode trunk

HTH

Rasika

Re: Vlan Configuration

dcgtechnologies — Tue, 02 Jan 2018 00:55:39 GMT

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?

Re: Vlan Configuration

Rasika Nayanajith — Tue, 02 Jan 2018 00:53:52 GMT

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

Re: Vlan Configuration

dcgtechnologies — Tue, 02 Jan 2018 01:11:06 GMT

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.

Re: Vlan Configuration

Scott Fella — Tue, 02 Jan 2018 01:52:56 GMT

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.

Re: Vlan Configuration

Rasika Nayanajith — Tue, 02 Jan 2018 02:05:54 GMT

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

Re: Vlan Configuration

dcgtechnologies — Tue, 02 Jan 2018 23:32:38 GMT

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.

Re: Vlan Configuration

Rasika Nayanajith — Tue, 02 Jan 2018 23:46:56 GMT

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

Re: Vlan Configuration

dcgtechnologies — Wed, 03 Jan 2018 00:05:56 GMT

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.

Re: Vlan Configuration

Rasika Nayanajith — Wed, 03 Jan 2018 00:07:31 GMT

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

Re: Vlan Configuration

dcgtechnologies — Wed, 03 Jan 2018 00:13:31 GMT

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.

Re: Vlan Configuration

dcgtechnologies — Wed, 03 Jan 2018 00:20:03 GMT

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 🙂

Re: Vlan Configuration

dcgtechnologies — Wed, 03 Jan 2018 00:21:42 GMT

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

Re: Vlan Configuration

dcgtechnologies — Wed, 03 Jan 2018 01:32:40 GMT

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.

Re: Vlan Configuration

Rasika Nayanajith — Wed, 03 Jan 2018 01:48:13 GMT

If your AP connected to port G1/0/48 then that should have below config. If AP is not there, pls plug your PC to that port & make that port active prior to test.

int g1/0/48

description AP01

switchport mode access

switchport access vlan 2

spanning-tree portfast

If G1/1/1 of SW2 connected to SW1, then SW2 should have below configs

int g1/1/1

description Trunk to SW1

switchport mode trunk

With those config, please check it again

HTH

Rasika

Re: Vlan Configuration

dcgtechnologies — Wed, 03 Jan 2018 02:00:27 GMT

Ok so here is the config I am shooting for

SW1 Port G1/0/1 has the Firewall with Vlan 1 and Vlan 2 (VLAN 2 hands out DHCP Addresses)

SW2 Port 1/0/48 - Physical port for AP using VLAN 2

Interconnect on SW1 (3750G) GigabitEthernet1/0/25
to Interconnect to SW2 (3750X) GigabitEthernet 1/1/1

Everything is working great currently no matter what I plug into SW2 Port 1/0/48 VLAN 1 only. VLAN 2 is not working at all. I have tried trunking that port it does not work at all. See the output from the trunking below for Switch 2:
interface GigabitEthernet1/0/48
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1-2
switchport mode trunk
!
interface GigabitEthernet1/1/1
!
interface GigabitEthernet1/1/2
!
interface GigabitEthernet1/1/3
!
interface GigabitEthernet1/1/4
!
interface TenGigabitEthernet1/1/1
!
interface TenGigabitEthernet1/1/2
!
interface Vlan1
ip address x.x.x.x
!
ip default-gateway x.x.x.x
ip http server
ip http secure-server
!
!
line con 0
line vty 0 4
password
login
line vty 5 15
password
login
!
ntp server
end

SW2#show interfaces GigabitEthernet 1/0/48 trunk

Port Mode Encapsulation Status Native vlan
Gi1/0/48 on 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

Output from trunking on Switch 1:

SW1#show interfaces GigabitEthernet 1/0/24 trunk

Port Mode Encapsulation Status Native vlan
Gi1/0/24 on 802.1q trunking 1

Port Vlans allowed on trunk
Gi1/0/24 1-2

Port Vlans allowed and active in management domain
Gi1/0/24 1-2
Port Vlans in spanning tree forwarding state and not pruned
Gi1/0/24 1-2

I am using the switchport command. What commands do I need to run to get the config above. I hope you and I are on the same page here 🙂 thank you.

Re: Vlan Configuration

dcgtechnologies — Wed, 03 Jan 2018 02:32:58 GMT

I think we are talking about two different things here. I am trying to trunk the port on SW1 Gi1/0/1 (Firewall connected to this port) to SW2 port Gi1/0/48 (AP is connected to this port) over SW1 Interconnect Port Gi1/0/25 to SW2 Interconnect Gi1/1/1. The default VLAN 1 is setup fine and is communicates just perfectly on both switches no matter what port I connect a device too. The VLAN 2 is not working at all on SW2, but works fine on Switch 1 on Port Gi1/0/24 which is trunked correctly. I have a trunk established on SW1, but SW2 port Gi1/0/48 is not configured for trunking. See output below for SW2 trunking:

SW2#show interfaces GigabitEthernet 1/0/48 trunk

Port Mode Encapsulation Status Native vlan
Gi1/0/48 on 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

See output below for SW1 trunking for port 1/0/24:

SW1#show interfaces GigabitEthernet 1/0/24 trunk

Port Mode Encapsulation Status Native vlan
Gi1/0/24 on 802.1q trunking 1

Port Vlans allowed on trunk
Gi1/0/24 1-2

Port Vlans allowed and active in management domain
Gi1/0/24 1-2

Port Vlans in spanning tree forwarding state and not pruned
Gi1/0/24 1-2

When I get SW2 port Gi1/0/48 configured for VLAN 2 correctly I will be eliminating SW1 Port GI1/0/24 from VLAN2 and the trunk. How can I fix this and what are the commands to achieve this? Thank you all.

Re: Vlan Configuration

Rasika Nayanajith — Wed, 03 Jan 2018 03:07:55 GMT

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

Re: Vlan Configuration

dcgtechnologies — Wed, 03 Jan 2018 19:03:25 GMT

Perfect! That is awesome! Works well!