Not a problem. This is the only configuration we found to work. Love to hear if anyone found another way. This is just an example.    interface port-channel1   switchport mode trunk   switchport trunk native vlan 1000   switchport trunk allowed vlan 1,90,1000   interface Vlan1000   ip address 10.255.255.x/30   ip ospf authentication message-digest   ip ospf message-digest-key (keyhere)   ip router ospf 1 area 0.0.0.0   ip dhcp relay address x.x.x.x   interface Ethernet1/1   switchport mode trunk   switchport trunk native vlan 1000   switchport trunk allowed vlan 1,90,1000   channel-group 1 mode active   I created an SVI on Meraki that matches the uplink 1000 VLAN and on the same /30 network. On the Meraki switchport uplink I configured native VLAN 1000 and the same allowed VLANS. We worked with Cisco TAC and Meraki Support to figure this out. They collected our configuration and using it as an example for Cisco Nexus to Meraki configurations. I recent connected a Cisco Catalyst 3750 model to Meraki  using the same configuration. The VLAN90 is for the Meraki management network and need to have a DHCP scope created, so the switch get an address assigned and connect to the Meraki dashboard.    Be a lot easier if Meraki would allow an IP address to be assigned to a physical port, but not possible.    Hope this helps.  T-MC   ... View more

I'm in the same situation. We have one large network and need to break it down into smaller networks. We have an access control list to create in Meraki that will block communication between classroom VLANs, but it will go well over the 128 limit. Our next option is to break up the network into several networks. I wished we could use network objects in the ACL's and that would solve our problem, so we could combine multiple CIDRs in one object.    The base network settings I can clone, but the switch's port configuration gets wiped. I need a way to copy a switch's port configs and restore it to the same switch in a different network. The Python scripts sound promising but I'm only finding a script that copies the port config back to the same switch and network. We may be able to use the script and move the port configs.   Any luck on figuring this? This is a feature that Meraki really needs to add. We have over 50 switches to move and that's a lot of work reconfigure all the switch ports.  ... View more

Hi Tricky83, Yes, Meraki and Cisco both confirmed the configuration was good. In fact, they documented our configuration to help with future support cases and designing. Sounds like my reply helped you figure it out? Let me know if you need more details about the config. I'm happy to post an example of what it looks like. I was able to get OSPF routing, DHCP relay, multicast, and port aggregation to work using the same configuration. Multicast was a monster to figure out, but we got it working.  ... View more

I believe we're having this issue and its causing our Mitel phones to randomly loose connection in two of our buildings. Packet captures at all points shows the traffic gets lost in the stack somewhere. It makes it to the Meraki up link, but never makes it to the phone port, so the phone finally resets the connection. I see in 11.30 known issues it still list "ARP entry on L3 switch can expire despite still being in use (predates MS 10.x)". That makes me think it has not been fixed, but maybe I"m not reading it right. We had Meraki support update the firmware from 11.22 to 11.29 on the problem stack only, but it didn't make a difference.    Has anyone found a fix? I tried moving the switch stacks main up-link to the master switch, but didn't help.  ... View more

I got it working today. I had to create a second Layer 3 vlans on the Core switch and add a helper address. I added the same vlan to Meraki Management IP configuration and it passed the DHCP request through it. My aggregated ports through port-channel is working with Ethernet trunk ports, port-channel trunk ports and layer 3 vlans. I sent the configuration to Meraki to view and get some feedback on. I will reply if they can provide some useful info, or better way to handle it. I had to set the Ethernet ports to channel-group ### mode active.      ... View more

I also like to here how this worked out. I'm setting up MS350 with dual ethernet fiber connections to Nexus core using port channel. I have the port channel and two fiber channels setup as trunk ports. I'm using a SVI on the Meraki and Nexus core for routing. I used channel-group 112 mode active to add the ethernet ports to channel group. It works, but not sure this is the best way to handle it. I'm having problems with Meraki pulling a Management IP address. I'm use to using layer 3 port channel groups.  I tried using a layer 3 port channel, but couldn't get it working. I like to know how you configured the ethernet ports and port channels. Also, are you using native Vlan 1, or Vlan number of the main SVI you created for uplink? Just trying to figure out best way to handle port channel group setup.  ... View more