JordansphereVMware
NSX Alert: Possible DHCP DOS Attack on Host
Problem Running NSX. 6.4.3. An error was keep appearing on one of our 6.7 ESXi hosts: NSX Alert: Possible DHCP DOS attack on host Resolution I believe this is a false positive from a bug in 6.4.x To check if there are any issues log into the affected ESXi host and run the following […]
Determine vCenter Build in 5.5
To check the vCenter build: 1) via C++ Client Help -> About VMware Vsphere 2) Via Web Client Home -> Vcenter -> vCenter Servers -> {Select vCenter server} -> Summary
Remove Datastore from Datastore Cluster in vCloud Director
Current Setup vCloud Director : 9.1 vSphere: 6.5 We have a datastore cluster with 2 datastores inside. As you can seee there are two datastores. saneql01-01 is the datastore I want to remove and is showing as empty Note: The official recommendation was to "remove the tag in vCenter and […]
NSX Manager Disconnected from vCenter
Problem We noticed NSX Manager had become disonnected from both the lookup service and vCenter Troubleshooting Check Connectivity From NSX Manager # debug connection {IP_of_vCenter} PING 10.63.240.1(10.63.240.1): 56 data bytes 64 bytes from 10.63.240.1: icmp_seq=0 ttl=64 time=0.205 ms 64 bytes from 10.63.240.1: icmp_seq=1 ttl=64 time=0.134 ms 64 bytes from 10.63.240.1: icmp_seq=2 ttl=64 time=0.096 ms […]
Zerto: VMDK Cannot Be Synced Because It Is Inaccessible
Problem After upgrading vSphere 6.5 to 6.7 U1 the VPG I was protecting failed witn the error: VMDK cannot be synced because it is inaccessible Troubleshooting The vsphere user (linked to AD) account used with zerto had access to the DS I was already using Zerto 6.5 U2 -which was the first release that supported […]
A General System Error Occurred. Failed to SSH connect to Peer Node
Problem A general system error occurred. Failed to ssh conenct peer node xxx.xxx.xxx.xxx vCenter: 10.34.59.1 Peer: 10.34.59.2 Witness: 10.34.59.3 Troubleshooting SSH is enabled on the primary VC (10.34.59.1) The peer deployed correctly and I could ping it via the HA link using HA IP addreses. However, I could not telnet on port 22 to […]
Change Default Gateway of NSX Controller
Problem A default gateway on the IP Pool servicing the NSX controllers had been mistyped during installtion. I needed to change this so my montioring system could route traffic to the 3 controllers. Versions: NSX .6.4.3 vCenter 6.7 Caveats NTP Server was on a different subnet so current controllers could not route to […]
vCloud Director 9.5 – The VCD Entity Does Not Exist
Problem When logged in as a vCloud Sys Admin in the Tenant (HTML5) interface and trying to delete any ISO from the Media section in vCloud Director 9.5 the following error appeared: Resolution VMware have identified this as a bug and are working on a patch. The workaround is to login in as an orginization […]
Test Outbound Connectivity on VCSA using Telnet
By default, telnet is not installed in the VCSA appliance. In fact its not installed in most VMware appliances. However there is a work around to test connectivity by using CURL Syntax: curl -v telnet://host:port Here are a couple of examples: curl -v telnet://www.google.co.uk:443 curl -v telnet://my.amqpserver:5672
Apply New Certificate to Tenant App Portal for vCloud Director
Here are the steps to apply a new certificate to the tenant portal app (1.2.0) 1. Login into the appliance using the vsphere Web Client using the root username Note: I could not find any documentation on what the root password was so I had to reset the password by entering the GRUB menu.and booting […]