MS-410 Layer 3 Stack Switch

[meraki-newbie]

Hello everyone, 

Is Stacking behavior on Meraki MS same like Catalyst Stack Switch? that two stacked switches will have 1 single management IP and SVI configuration

we face some intermittent problem when we want to add another MS410 to become stack with the older one, with these configuration below :

Old Topology 

Old MS410 Switch - FW

Management IP Old MS410 Switch : 192.168.1.3/24

SVI Old MS410 Switch as p2p to FW : 192.168.1.3/24

IP p2p on FW side : 192.168.1.1/24

New Topology

(Old MS410 Switch + New MS410 Switch) Stacked  - FW

Management IP Old MS410 Switch : 192.168.1.3/24

Management IP New MS410 Switch : 192.168.1.4/24

SVI Stack Switch as p2p to FW : 192.168.1.3/24

IP p2p on FW side : 192.168.1.1/24

we encountered intermittent problem on p2p connection between Stack MS410 to FW by using the New Topology above, could be the problem caused by conflicted IP between these two IP ?

Management IP Old MS410 Switch : 192.168.1.3/24

SVI Stack Switch as p2p to FW : 192.168.1.3/24

Thanks

[Brash]

Each switch in the stack will have a different management IP. That's completely expected.

However, your switch management IP and point-to-point SVI to the firewall should not be the same. See the following excerpt from the MS L3 guide:

The management IP is treated entirely different from the SVIs and must be a different IP address. It can be placed on a routed or non-routed VLAN (e.g.: a management VLAN independent from client traffic).

MS Layer 3 Switching and Routing - Cisco Meraki Documentation

[meraki-newbie]

at the moment we could solve the problem by using these configuration below :

Management IP Old MS410 Switch : 192.168.1.2/24

Management IP New MS410 Switch : 192.168.1.4/24

SVI Stack Switch as p2p to FW : 192.168.1.3/24

IP p2p on FW side : 192.168.1.1/24

we decide to differ the SVI and Management IP Old MS410 Switch, so far there are no further issue, but another question is :

should we use different subnet between SVI and P2P IP addressing? or we could run with our current configuration right now, by using different SVI and P2P IP addressing on the same subnet?

cheers

[GIdenJoe]

The traditional Meraki switches (all MS except for MS390 which is in fact a C9300) act like individual switches.  So they each have their own management IP in addition to a common stack SVI used for routing.  So the entire stack will have 1 IP as SVI but each individual switch will have it's own management IP.

The management IP's cannot be routed by the stack's own SVI so the default gateway of the management IP's must reside on the upstream device (like the MX).

[meraki-newbie]

at the moment we could solve the problem by using these configuration below :

Management IP Old MS410 Switch : 192.168.1.2/24

Management IP New MS410 Switch : 192.168.1.4/24

SVI Stack Switch as p2p to FW : 192.168.1.3/24

IP p2p on FW side : 192.168.1.1/24

we decide to differ the SVI and Management IP Old MS410 Switch, so far there are no further issue, but another question is :

should we use different subnet between SVI and P2P IP addressing? or we could run with our current configuration right now, by using different SVI and P2P IP addressing on the same subnet?

cheers