1. Mert Cevik

Mert Cevik

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Viewing 15 posts - 106 through 120 (of 160 total)
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  • in reply to: revive the ServiceXSlice? #5215
    Mert Cevik
    Moderator

      Fengping,

      I checked the VMs on this slice (I will indicate the IPs below) and all of them have a sliver key as below.
      ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNo … nrsc4= sliver

      On the FABRIC bastion hosts, I see the following (bastion) key
      ecdsa-sha2-nistp256 AAAAE2VjZ … frtHLo= bastion_

      You can check your ssh configuration and sliver key accordingly.

      For the FABNetv6Ext network, all VMs have their IPs in place and could ping the default gateway in their subnet (2602:fcfb:1d:2::/64). These IPs are also receiving traffic from external sources, so they seemed in good health.

      However, I could not ping the IP you mentioned in the peering subnet  (eg. 2602:fcfb:1d:3::/64). My visibility is limited for this peering subnet and I’m not sure where they are active. I notified our network team about this.

      VMs:
      2001:400:a100:3090:f816:3eff:fe56:acb7
      2001:400:a100:3090:f816:3eff:fe80:bfc7
      2001:400:a100:3090:f816:3eff:fe9c:3e41
      2001:400:a100:3090:f816:3eff:fee3:ef05
      2001:400:a100:3090:f816:3eff:fe8b:deb0
      2001:400:a100:3090:f816:3eff:fe8a:f1d1
      2001:400:a100:3090:f816:3eff:fe1c:385f
      2001:400:a100:3090:f816:3eff:feaa:161a
      2001:400:a100:3090:f816:3eff:fee2:d192
      2001:400:a100:3090:f816:3eff:fe31:1eeb

      0
      in reply to: FABRIC NAT64 Service Outage(8/28 – ???) #5203
      Mert Cevik
      Moderator

        FABRIC Nat64 solution is back online.

        0
        in reply to: FABRIC-SALT Outage #5067
        Mert Cevik
        Moderator

          All VMs are active following a reboot. All network services are online. We apologize for the this inconvenience. Please let us know if you have any issues on your slivers.

          0
          in reply to: Any problems with SSH connectivity? #5004
          Mert Cevik
          Moderator

            Hello Bruce,

            Inside this VM (205.172.170.76), an ssh public key identified as “fabric@localhost” is present under user account ubuntu.
            VM is accessible with SSH from public internet. With the right ssh key and ssh client configurations as described on https://learn.fabric-testbed.net/knowledge-base/logging-into-fabric-vms/ you should be able to login to the VM.

            On the other hand, as you mention you are suddenly unable to login to the VMs, it could be a related to a change with the SSH key inside the VM. Can you confirm the ssh key that I mentioned above is the one that’s supposed to be present in the VM?

            0
            in reply to: bastion ssh login #4734
            Mert Cevik
            Moderator

              There may be multiple issues that we will be working on.

              In order to eliminate the possibility of an issue with the “outside” IP address that you’re using, can you please send your IP address?

              0
              in reply to: Long running slice stability issue.  #4733
              Mert Cevik
              Moderator

                2 VMs were stopped by the hypervisor and I started them. Can you please check the status and your access?

                Root cause of this problem is a known issue that we could correct on Phase-1 sites last month, but some of the Phase-2 sites did not receive this correction yet. We will find convenient time in the next few weeks, for now we will be able to help when this occurs.

                0
                Mert Cevik
                Moderator

                  Maintenance is completed.

                  0
                  in reply to: Maintenance on FABRIC-MASS between June 5-9 #4467
                  Mert Cevik
                  Moderator

                    FABRIC-MASS is shutdown and will be online by the end of Multi-day FABRIC maintenance (June 12-June 16, 2023)

                     

                    0
                    Mert Cevik
                    Moderator

                      Work on network connectivity for FIU is still in progress. We are working with the hosting campus to resolve the issues. FIU will remain in maintenance until the end of multi-day maintenance that we will perform next week (6/12).

                      0
                      in reply to: Multiple problems in FABRIC [Partially Resolved] #4465
                      Mert Cevik
                      Moderator

                        Update:

                        • GATECH worker-2 (GPU-worker) problem is resolved.
                        • Status of SRI will be posted separately. It will remain in maintenance until after the general maintenance next week.
                        0
                        in reply to: Maintenance on FABRIC-MASS between June 5-9 #4464
                        Mert Cevik
                        Moderator

                          FABRIC-MASS will be shutdown tomorrow (6/5) at 9am EST. All slivers on FABRIC-MASS should be deleted before the shutdown. Current VMs will be permanently removed, please make sure experiment data is backed up.

                          0
                          in reply to: Maintenance on Bastion Hosts – 6/2/23 (1-4pm EST) #4463
                          Mert Cevik
                          Moderator

                            Completed.

                            0
                            in reply to: Maintenance on Bastion Hosts – 6/2/23 (1-4pm EST) #4455
                            Mert Cevik
                            Moderator

                              Due to the volume of the active ssh connections on bastion-1 and to prevent interruptions on the experiments,
                              this maintenance will be performed at 9pm EST today (6/2)

                              0
                              Mert Cevik
                              Moderator

                                Completed. FABRIC-MICH FastNet worker is available for experiments.

                                0
                                in reply to: Issue with NVIDIA driver on basic_gpu_devices #4349
                                Mert Cevik
                                Moderator

                                  It seems that developer.download.nvidia.com can be resolved for only IPv4. We will find out if there is a workaround (and follow up on this thread), but short-term solution is using one the following racks on your experiments.

                                  MAX, TACC, MASS, UCSD, GPN.

                                  These racks provide IPv4 addresses for the VM Management Network.

                                  0
                                Viewing 15 posts - 106 through 120 (of 160 total)