ucs fabric interconnect learns dynamic MAC address

Additionally, the ARP message will also be sent out the UCS uplink Server A is pinned to. When Server A issues an ARP message to learn Server B’s MAC address, this is a broadcast message that will be sent to all servers inside UCS on VLAN 10, connected to 6100-A. Server A’s primary NIC for VLAN 10 is connected to 6100-A. Server A will initiate a conversation with Server B. The Cisco UCS Fabric is in End Host Mode. Here’s the setup: I’ll refer to the server inside Cisco UCS as Server A, and the server outside UCS as Server B. Since there are no MAC learning on the uplink ports, so when the ARP reply comes back down the uplink, does this mean NIC 20&’s MAC will not be recorded in the MAC table on the FI 6100? what happens to subsequent unicast frames from NIC 10 to NIC 20? I know they will go up the uplink, but will they also be flooded to the local vlan 10 server ports also? Let&’s say NIC 10 ARPs for NIC 20, the frame is sent to the upstream switch via the uplink that handles the broadcast, and also other local vlan 10 server ports.

NIC 10 is on vlan 10 and is connected on a server port on FI 6100, NIC 20 is on vlan 10 and is connected to an upstream switch that connects to the uplink ports on the same FI 6100. Here is the scenario, the communication is with two devices on the same vlan but connected to different devices. I do have a question regarding End Host mode and hoping you can help me with it. I learned a lot about UCS networking from the HD videos you posted on. Thanks for sharing your data center knowledge. I recently came across your website, it is really an awesome resource. With the Fabric Interconnect in End Host Mode, what happens when the server inside UCS tries to communicate with the server outside UCS, starting with ARP and the subsequent unicast conversation. Wei paints a scenario of two servers in the same VLAN, one inside Cisco UCS, the other outside of Cisco UCS. This question comes from a reader named Wei about how Cisco UCS behaves in End Host Mode with respect to MAC learning and flooding.

Ucs fabric interconnect learns dynamic MAC address