Meraki

Eddy_X · ‎Aug 30 2022

Hello everyone, I am running into an issue that seems to apply to different devices. The topology is below. The first model is having issues, and the second one is working just fine. Medical device(172.x) -- switch -- A PC with dual NIC(172.x, NAT 10.x) -- Meraki MS250 -- MS425 -- Cisco C6509E -- Servers(10.x) Medical device(172.x) -- switch -- A PC with dual NIC(172.x, NAT 10.x) -- Cisco2960x -- Cisco C6509E -- Servers(10.x) The PC that has dual NIC acts as a software firewall. It has IP from the company network(10.x) and IP from the local network(172.x). I was also asked to assign a company IP(10.x) to the Medical device. The vendor engineer did some kind of NAT setting on the firewall PC. Issue symptoms: Medical device(172.x) is not able to ping Server(10.x) if the network path has a Meraki device. Another engineer did some packets capture, and he was saying it looks like some broadcast packets are missing. I think this is an L2 issue, and no router exists in the physical path.

Eddy_X · ‎Aug 5 2021

I had a similar issue before which would not show connection even the fiber has laser. In my case, the fiber between switches is 62.5/128, the orange ones. I was using MA-SFP-10GB-SR and the weird thing is that there was only one connection that worked, and not the others. I end up using an old SFP Cisco DS-SFP-FC8G-SW on both ends and I notice the link is 1G rather than 10G or 8.5 G. Maybe you want to try force 1G with full duplex on the uplinks.

Eddy_X · ‎Aug 5 2021

I have a MS250 with all default settings connects to our network as a access lay switch. The PC with firewall software has two NICs. One to the MRI machine within its own 172.x.x.x network, and the other one connects to our 10.x.x.x network. The firewall software does NAT to allow the MRI machine to communicate with other systems in our network. Connections between switches(Cisco-Meraki, Meraki-Meraki) are Trunk ports, allow ALL VLANs, and native VLAN1. When I plug the firewall PC into MS250, I got intermittent ping success from MRI to VMWave. When I plug the firewall PC into Cisco 2960, I got no problem. I was thinking maybe something to do with the ARP table since technically the NIC on the firewall PC which connects to my network will have two IP on the same MAC address. DAI is disabled by default and I tried to make all the trunking uplinks/downlinks ports trusted. Still having issues. Any thought would be greatly appreciated. Edited1 Current Meraki MS firmware version MS11.27 Not sure if this has anything to do with this issue

Eddy_X · ‎Jun 30 2021

I guess stacking is the way to go. Thanks.

Eddy_X · ‎Jun 30 2021

Thanks @DarrenOC ,6509 is definitely a great great product. We had no issue at all in the past ten years. The only thing is that we had two and one of them is water damaged and we could not get it replaced. Also, the MS425 has been purchased, and I do not want to leave it just in the storage room.

Eddy_X · ‎Jun 29 2021

I have a traditional Cisco HSRP setup with two Cisco6509E acting as the core. Now we are going to replace those 2 Cisco 6509E with 2 MS425. I am trying to figure out if I should use stacking or VRRP. Option1, physical stack with 2*MS425 Option2, VRRP between two MS425 If I do option2, I guess the network topology is simply a one-to-one replacement from Cisco6509 to MS425. From what I understand, the VRRP can not be created between the stacked switch. So, that means the VRRP can only be done between 2 of MS425. I only have 32 SFP+ on each of them. What if I need more SFP+? -------------------------------------------------------------------------------- If I do option1, I can stack these two MS425 like the topology. So my question here is, do I get redundancy like VRRP from the core stack? My understanding is the STACK has one IP that will be acting as the L3 gateway. So if one of the switches in the stack failed, is the L3 gateway still be working fine? Thank you everyone.

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Missing broadcast packets between Meraki and Cisco switch

Re: Weird connectivity issue /w switch & SFP+ from other vendors

Intermittent connection on switch port

Re: 2*MS425 Stacking or VRRP?

Re: 2*MS425 Stacking or VRRP?

2*MS425 Stacking or VRRP?

2*MS425 Stacking or VRRP?