how to determine cluster network mac address

So when the active node was A and I failed over the cluster roles to node B, the failover process was completing successfully however the 3 cluster IP addresses would stop pinging and wouldn’t start pinging again until an hour or so… if I reverted back to node A instantly, the pinging would start again.

Running continues ping to all 3 IP addresses during failover tests.All 3 IP addresses are in the same VLAN.

The cluster consists of 3 Network resource a cluster IP address and 2 SQL instance addresses which float between the 2 nodes depending on which one is active.Each node has 2 NICs, one for the client and management network, and one for the heartbeat network.The nodes are running Server 2016, SQL 2012 and Microsoft Failover Cluster services.For the sake of this blog post lets call the 2 nodes A and B.Recently I found myself troubleshooting a MS Failover cluster deployment which wasn’t behaving quite in this manner. The Layer 3 switch / router then updates the MAC address in the ARP table and packets are routed to the node which claimed the cluster roles. (Thus, containers within a Pod can all reach each other’s ports on localhost).This was a particularly odd issue which I had never experienced before so I thought it’s worth blogging about it.ĭuring a normal MS Failover Cluster failover operation, the node calming the cluster roles sends out a GARP request to notify the networking infrastructure of the MAC address change. Kubernetes IP addresses exist at the Pod scope – containers within a Pod share their network namespaces – including their IP address and MAC address.You can get the MAC address of the network interfaces using the command ip link or ifconfig -a.Think well whether or not you should though! It is possible to set the MAC address of a pod or container.(Courtesy, Wikipedia.) Stuff you wanna know: A MAC address or media access control address is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment.

How to determine cluster network mac address