2960x / Meraki MX250 - 2 Locations, no DHCP at off-site location

[tinywashbear]

Hello, this is most likely a firewall problem but I wanted to ask here before I go that route.

I have 2 locations that are connected with the same fiber run. The primary site has an MX250, and 3 stacks of 2960x switches each with 3-4 switches in the stack. We need to setup a separate VLAN/network for guests that does not touch production at the off-site location.

I made a DHCP scope of 10.x.x.x on my MX250 with a /24 subnet. DNS is just going through 8.8.8.8 / 8.8.4.4. I tagged it with VLAN 9.

My main stack with the uplink to the Meraki has a port tagged with VLAN 9, it's configured as such:
interface Vlan9
description Wired Guest
ip address 10.101.9.1 255.255.254.0
ip helper-address 10.101.9.254

I've confirmed on a separate port on this stack that I'm able to get DHCP from it, everything works. When I switch to my off-site location, plug in, and add a port to VLAN 9, I get nothing. I can't ping the 10.101.9.x addresses, and renewing my IP gets me no results. I've assigned a static 10.101.9.29 IP to my device and still can't reach it.

This "shouldn't" be touching our firewall, but before contacting our security team I wanted to make sure logistically that everything makes sense here. Am I missing any other factors?

Thanks.

[balaji.bandi]

Some information not clear ?

IP configured  main switch - 10.101.9.1  (on Meraki what ip configured - can they able to ping each other - before we go to DHCP issue ?)

DHCP Server running  on MX device have IP address 10.101.9.254 ?

make sure your subnet matches also when you configuring the DHCP Server.

if the end device configured 10.101.9.29 with subnet 255.255.254.0 - that should ping - 10.101.9.1 (since Switch hold the SVI IP address.

can you post show run from 2900 switch and provide what port connect to meraki.