Category Archive Data Center

VDC_MGR-2-VDC_BAD: vdc_mgr: There has been a failure at res_mgr

Error Message: VDC_MGR-2-VDC_BAD: vdc_mgr: There has been a failure at res_mgr Explanation: You cannot create a VDC because not enough resources are available based on the template configuration. If no template is used, a default template is applied. Reco…

Cannot activate zoneset and cannot configure zoning in enhanced zoning mode

The zone set cannot be activated and zoning cannot be configured in enhanced zoning mode. The error message “Zoning database update in progress, command rejected” might be received. Possible Cause Another user on the same switch or on a different swit…

Switch Profiles in Nexus 5000

Information About Switch Profiles Several applications require consistent configuration across Cisco Nexus 5000 Series switches in the network. For example, with a Virtual Port Channel (vPC), you must have identical configurations. Mismatched configuratio…

Link pause (flow control) not enabled on back to back Nexus 5000 switch links

When link pause (flow control) is not enabled on back-to-back Nexus 5000 switch links, packets are dropped while sending traffic on a no-drop class. ======================================================================================================= Po…

Traffic not queued or prioritized correctly on Nexus 2148, Nexus 2232, and Nexus 2248

After configuring all three types of policy maps (QoS, Network-QoS, and Queuing), the traffic is not queued or prioritized correctly on Nexus 2148, Nexus 2232, and Nexus 2248 switches. =================================================== Possible Cause The…

MTU for “class-default” value is 1500 when jumbo MTU configured

When the configuration for the network-qos policy-map sets the class-default to jumbo MTU, the show queuing interface command indicates that the MTU for class-default is 1500. ===================================================================== Possible …

Cannot pass frame size larger than 2300 bytes through switch

Although the jumbo MTU has been configured for class-default, you cannot pass a frame size larger than 2300 bytes through the Nexus 5000 switch and the Nexus 2000 FEX. ============================================================ Possible Cause The CoS val…

Licensing Installation Issues

Error Message: LICMGR-3-LOG_LIC_INVALID_HOSTID: Explanation: The feature has a license with an invalid license Host ID. This can happen if a supervisor module with licensed features for one system is installed on another system. Recommended Action: Reinst…

Unable to configure vPC

In this blog you will see the solution when you are configuring the VPC , the Nexus not allow to configure the vPC. Some of the possible cause has been discussed here : Possible Cause vPC is not enabled or is not supported in the NX-OS release of software…

How pxe works in datacenter

PXE works with Network Interface Card (NIC) of the system by making it function like a boot device. The PXE-enabled NIC of the client sends out a broadcast request to DHCP server, which returns with the IP address of the client along with the address of t…