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  • About knolf
knolf

knolf

Conversationalist

Member since Mar 22, 2023

‎03-24-2023
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  • Latest Contributions by knolf

Re: Azure: Using a Load Balancer to achieve high-availability and load-bala...

by knolf in Security / SD-WAN
‎03-22-2023 01:01 PM
3 Kudos
‎03-22-2023 01:01 PM
3 Kudos
Agree, if you use firewall functionality ( which is not the case for me ) on the Meraki it will not work  because of asymmetric flows. The BGP approach is the better solution then as you can prefer on Vmx over the other ( as prepending, ... ) . I did not test the Azure Function yet, not sure how fast it converges the routing. Unfortunately, Azure load-balancer does not support active / passive mode (yet). It will use all available hosts in the load-balancer pool. ... View more

Re: vMX Large on Azure

by knolf in Security / SD-WAN
‎03-22-2023 10:50 AM
‎03-22-2023 10:50 AM
I have been testing a setup using an Azure load-balancer to achieve high availability and spreading the load across multiple Meraki.   Azure: Using a Load Balancer to achieve high-availability and load-balancin... - The Meraki Community ... View more

Re: vMX in Azure High Availability

by knolf in Security / SD-WAN
‎03-22-2023 10:18 AM
‎03-22-2023 10:18 AM
I know this is an old thread but I have been testing another way to achieve HA using Meraki in Azure using Azure load-balancer.   Azure: Using a Load Balancer to achieve high-availability and load-balancin... - The Meraki Community ... View more

Azure: Using a Load Balancer to achieve high-availability and load-balancin...

by knolf in Security / SD-WAN
‎03-22-2023 06:36 AM
‎03-22-2023 06:36 AM
Hi,   I deployed 2 Meraki vMX in Azure following the official guide.   vMX Setup Guide for Microsoft Azure - Cisco Meraki   Each vMX is deployed in a different Azure availability zone. I use a hub and spoke model where the Merakis are deployed in the hub and the workloads in the spoke. There is a vnet peering between the hub and the spoke. A routing table is deployed in the spokes routing the traffic to the load-balancer which sits in front of the Merakis. Both Merakis advertise the same Azure IP address subnet ranges into the AutoVPN.   To achieve high-availability, there are 2 options I know off:   1) Implement an Azure function that tracks the health of the VMs and changes the routing table accordingly Deploying Highly Available vMX in Azure - Cisco Meraki   2) Implement E-BGP    GitHub - MitchellGulledge/Azure_Route_Server_Meraki_vMX   However, I tested another option that seems to work. I used a solution which is used all the time with 3rd party network virtual appliances in Azure: a load balancer.   I deployed an Azure load-balancer in "NVA" mode. Basically, it load-balances all traffic it receives on its front-end IP to the backend VMs ( the 2 Meraki ). To check if the Merakis are up and running, I configured a probe on the Azure Load balancer that does a http get on TCP port 80 of the Meraki ( local status page of the Meraki ) . If responds with a 200 OK, it means the Meraki is up and running. I tested and the local status page is only reachable on the private IP, not on the public IP. Using traceroute on different VMs in the spokes, I can see that the traffic is load balanced across to the 2 Azure Merakis. One VM is routed to Meraki 1 while the other one is routed through Meraki 2. I use srcip / port as the load-balancing scheme on the Azure load balancer. When I shut down one of the Meraki, the load-balancing http probe fails and the load-balancer will not forward any traffic anymore to that failed Meraki. Failover takes about 15 seconds. The moment, I start again the Meraki, the probe will start working again and the load-balancer will start using it again.   Another advantage is that the throughput can scale horizontally ( add additional vMX ), at least outbound from Azure ( Azure -> on-prem ). Return traffic ( on-prem -> Azure ) will always use the Azure MX which is configured as the preferred one ( concentrator priority ).As you may know, only medium Azure vMX is supported for now.   Anyone experience with this setup ? Would also like to get some feedback from Meraki if this is a supported setup. It looks to be working fine and I find this a better solution then the Azure Function solution. I think the E-BGP setup is still the best solution ( not tested that one yet ).     Regards,   Kurt       ... View more
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Re: Azure: Using a Load Balancer to achieve high-availability and load-bala...

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