Help with vlan configuration

[GoranP]

Hello to everyone,

Im engaged from my employ to do some advanced configuration on existing network. Im completely new to Meraki but have some expirience doing network administration.

I have problem with vlan configuration.

network:

Palo Alto firewall

2 x MS425-16 in stack

5 x MS225-48

10 x MR56

Admins before me configured entire network in vlan 1 (servers, clients, meraki management IP...)

and that is work fine.

On stack is created switch vlan interface in default vlan 1 192.168.0.29 and global default route is 0.0.0.0/0 -> 192.168.0.1 (that is address of palo alto interface)

The idea is to make more separate vlans like Guest, Users, Servers, Device Management with different subnets

I created Guest switch vlan 20 interface on stack 192.168.20.1/24 with dhcp relay in 192.168.0.0 network where is server, and that is work fine.

I wonted to make Management vlan for all Meraki devices in subnet 192.168.3.0 and i created switch vlan 3 interface on stack 192.168.3.1/24 after i change the ip address of all Meraki devices to appropriate IP address for examle 192.168.3.10 with default gateway 192.168.3.1 and put it in vlan 3

After i do that 15 of my devices resume working just fine but i lose connectivity with my core switches. (2 x MS425-16 in stack)

I tried changing management vlan to vlan 3 in /switch/switch settings/vlan configuration option and did not help..

both switches are pingable from devices in the new vlan 3 but they are unreachable from dashboard and from any other device. After 2 hours they come back online with old configuration. (have some different trials where i again lose connectivity for 2h)

I hope i provide enough information about the problem, if there is any information that i can provide i would do it.

Thanx in advance.

[ww^]

The routing stack should not have management ip address/gateway pointing to its self owned vlan interface .

I would create the management layer3/vlan on the firewall and run that management vlan at layer2 down all device.

[GoranP]

Hello,

I also tried something similar, created subinterfaces on Palo Alto interface for networks 192.168.0.0 and 192.168.3.0

but i left switch vlan interface up. How to dawngrade to vlan 2, dont have option to just create vlan on layer 2 ?

Is it enough to just delete switch vlan interface on stack and provide IP address form subnet 192.168.3.0 with default gate 192.168.3.1 and vlan 3 to Meraki devices? (in that case i would set subinterface on the firewall IP 192.168.3.1)

[CMR · Accepted solution]

@GoranP yes, all VLANs are on the Meraki switches by default. By deleting the interface you will achieve what you are wanting.

[GoranP]

Thank you for fast response 🙂

I will try that after working hours.

I will report the end results 🙂

[GoranP]

Hello !

I did it successfully. (i make vlan on the firewall and delete switch vlan interface on stack, after that i regain connection with my devices)

Thank you for your help.