Nexsus load balancing mechanism for FcoE Mappings

On the Nexus 5000, the default load balancing mechanism on the LACP port-channel is source-destination. If we leave it in this state, all the FCoE traffic will take the same link in the port channel when the Nexus 5000 is forwarding frames to the upstream device. To enable the Nexus 5000 to load balance using exchange IDs, we configure it for ‘source-dest-port’ load balancing. Nexus5000(config)# port-channel load-balance ethernet ? destination-ip    Destination IP address destination-mac   Destination…

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Example:Mapping VSANs to VLANs

Example:Mapping VSANs to VLANs The following example shows how to configure the FCoE VLAN and a virtual Fibre Channel interface: SUMMARY STEPS 1.    Enable the associated VLAN and map the VLAN to a VSAN. For Cisco Nexus 7000, ensure you are in the storage VDC. 2.    Configure the VLAN on a physical Ethernet interface. 3.    Create a virtual Fibre Channel interface and bind it to a physical Ethernet interface. For Cisco Nexus 7000, ensure you are in the…

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Nexus 5500 to Nexus 7000 Multi-Hop FCoE Configuration Example

Configure In order to begin this process, you must verify that: The Nexus 7000 has the FCoE feature enabled. The module F1 is licensed for FCoE. The system Quality of Service (QoS) is set correctly. The storage Virtual Device Contexts (VDC) are created. The dedicated and shared interfaces are configured. In order to configure the Nexus 7000 Switch for Multi-Hop FCoE, complete these steps. Enter these commands: default_vdc(config)# license fcoe module 1 default_vdc(config)#system qos default_vdc(config-sys-qos)# service-policy…

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Configuring Cisco Nexus 5500 series switches with Dual-Homed FEXes

More and more Enterprises come to a decision to deploy Cisco Nexus switches in their corporate data centers. One of the main design considerations relates to Cisco 2200 Fabric Extenders (FEX) connectivity topology. To provide high availability Cisco Nexus 5500 series switches support different options to connect FEXes (all are based on a Virtual Port Channel feature): Straight-Through, where every FEX is connected to a single N5K (Active/Active and Active/Passive servers); Dual-Homed, where each FEX…

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FCoE – Waiting for flogi…

FCoE – Waiting for flogi… Last week I was working on a pair of Nexus 5596s and for the life of me could not get a CNA to login to the fabric.  I kept getting the following error: 2012 Jul  6 11:36:33 ANR-N5K-A %PORT-5-IF_TRUNK_DOWN: %$VSAN 664%$ Interface vfc1, vsan 664 is down (waiting for flogi) After reconfiguring the vfc and pulling my hair out, I contacted Cisco TAC and learned the error of my ways.  The…

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