Another main reason is to protect against an unreachable gateway preventing a connection to the cluster. For example, this distributes the user load across many login gateways. There are several reasons why we have multiple gateways of each architecture. The cluster has roughly 6 x86 gateway machines (See node configuration). If you see the following error when trying to connect: ssh: connect to host port 22: Operation timed out it means the gateway you’re trying to connect to is unreachable.For more information go to Logging on to the Cluster.
You may connect to the cluster only via a Secure Shell ( SSH) client.Please read the following to help self-diagnose before submitting a help desk ticket so we are better able to assist you: Besides occasional network problems, there are a number of possible causes for sluggish to zero connectivity. Please provide as much information about the issue as possible including any useful output to your screen. If you are normally able to connect and suddenly cannot, let us know by submitting a helpdesk ticket.
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