There are many causes for host unable to discover the storage over FCoE. Such as VLAN configuration on FCoE switch, improper zoning, driver issues etc. In this post, we will talk about VN2VN mode. What is VN2VN mode and how it makes a difference? VN2VN mode: Virtual N_port to VN_port connecting two FCoE adapters on …
After upgrading ESXi host to 6.5 U1, hosts may experience the PSOD. Contributing factors: Cause : Netqueue commit phase abruptly stops due to a failure of hardware activation of an Rx queue. Workaround: The workaround for this issue is to downgrade the ESXi host to 6.0 U2. As 6.0 U2 has the fix for this …
After upgrading the ESXi host to 6.5 U1, the host may experience a PSOD. This post will help in verifying the symptoms. It also helps in summarize the cause and the solution for the issue. Symptoms: In vmkernel logs we see following messages prior to PSOD: PSOD stack : Multiple CPUs getting locked: Cause: This …
Networking is a practical subject. The more practice we do, we get better at it. With great enthusiasm, I downloaded Cisco Paket Tracer for the hands-on. After initial login, during practice typed a wrong command. Guess what I need to wait till the DNS/Domain lookup got timed out. Got in this situation multiple times. Started …
When user issue ./symcfg discover from solution enabler it sends 0x3c and 0x3b commands to the Symm and VMAX. The behaviour remains same even solution enabler software is installed on the VM hosted on ESXi host. Some times we see 0x3c/0x3b commands getting failed with following messages on ESXi host: Scsi command 0x3c is Read Buffers. …
After upgrading HP-Gen8 servers with Gen9, few of us had faced an issue where the host was unable to connect to storage. Whereat the same time Gen8 hosts can connect to the same storage without any issue. Gen9 servers come with Qlogic FCoE HBAs compared to Gen8 servers which had FC HBAs. With the latest drivers …
SAN transport is not supported for backup or restore of virtual machines residing on VVol datastores. To overcome this limitation nowadays many organization prefer to use VMware hot add backup. How Hot add backup works? Backup software runs in a virtual appliance, it takes a snapshot and create a linked clone of the target virtual …
The host is losing access to the existing NFS share when the user renames the share and present a new share with the old name of an existing share. Steps to Repro: 1. Map an NFS share to host with any name, for example, “NFS-01.” 2. “NFS-01” has a shared path as “/nas/nfs-1.” 3. Rename …
Today, I had a conversation with a customer who had recently completed the setup of the Tanzu K8S supervisory cluster. Post-setup, he upgraded vCenter from 7.0 to 7.0U1 and encountered an unexpected issue. Instead of displaying the Enterprise Plus license, the Kubernetes cluster began showing a 60-day evaluation license. He sought my assistance to resolve …
