topic Re: Network set up error - Cluster join request rejected in ONTAP Discussions

Network set up error - Cluster join request rejected

VMUNOZ_NTT — Thu, 05 Jun 2025 06:08:14 GMT

Hi all,

Next week I'm attending a Clustered course, and instead of setup an environment with simulators, I'm installing an environment using an old FAS3070 with an old DS14MK4 and one additional Quad Port NIC per node, for laboratory purposes only.

I created a dedicated VLAN in my switches for cluster interconnect purposes and I configured it with MTU 9000 in the switch ports related to controller ports that I'm using with cluster role, basically e0b & e1b of each controller.

The cluster setup process in the first node goes fine, but joining the second node to the cluster fails: The exact message that I get is:

Network set up .....Error: Cluster join request rejected: Cluster RPC connectivity test failed. Verify that the port MTU values

on all controllers and network switches on the cluster network are set to the same MTU value

However, I have ping visibility of cluster IPs between the nodes, node01 sees node02 and vice versa. I reviewed MTU on switch ports and all are set to 9000.

Any ideas?

Re: Network set up error - Cluster join request rejected

VMUNOZ_NTT — Tue, 12 Mar 2013 10:25:53 GMT

Update: Reconfigured MTU on switch ports from 9000 to 9014, but without success results. node 2 still can't join the cluster. Ping connectivity between nodes exists but second node can't pass Network set up tests to join the cluster, same error message.

Re: Network set up error - Cluster join request rejected

mrinal — Tue, 12 Mar 2013 11:48:01 GMT

Hi,

Could you the output of "network port show -role cluster" and "network interface show -role cluster"? My theory is that roles for the ports might have reset to system-default values.

Re: Network set up error - Cluster join request rejected

VMUNOZ_NTT — Tue, 12 Mar 2013 14:20:52 GMT

Hi Mrinal,

cluster::> net port show -role clust

(network port show)

Auto-Negot Duplex Speed (Mbps)

Node Port Role Link MTU Admin/Oper Admin/Oper Admin/Oper

------ ------ ------------ ---- ----- ----------- ---------- ------------

cluster-01

e0b cluster up 9000 true/true full/full auto/1000

e1b cluster up 9000 true/true full/full auto/1000

2 entries were displayed.

cluster::> net int show -role cluster

(network interface show)

Logical Status Network Current Current Is

Vserver Interface Admin/Oper Address/Mask Node Port Home

----------- ---------- ---------- ------------------ ------------- ------- ----

cluster-01

clus1 up/up 169.254.169.69/16 cluster-01 e0b true

clus2 up/up 169.254.154.91/16 cluster-01 e1b true

2 entries were displayed.

And on the second node:

::> net port show -role cluster

(network port show)

Auto-Negot Duplex Speed (Mbps)

Node Port Role Link MTU Admin/Oper Admin/Oper Admin/Oper

------ ------ ------------ ---- ----- ----------- ---------- ------------

localhost

e0b cluster up 9000 true/true full/full auto/1000

e1b cluster up 9000 true/true full/full auto/1000

2 entries were displayed.

::> net int show -role cluster

(network interface show)

Logical Status Network Current Current Is

Vserver Interface Admin/Oper Address/Mask Node Port Home

----------- ---------- ---------- ------------------ ------------- ------- ----

localhost

clus1 up/- 169.254.154.247/16 localhost e0b true

clus2 up/- 169.254.85.145/16 localhost e1b true

2 entries were displayed.

I think all seems ok. I'm using 1Gb ports, but I think don't should be the problem. Maybe could I try setting MTU to 1500? in switches and controllers ports.

Thanks,

Re: Network set up error - Cluster join request rejected

mrinal — Wed, 13 Mar 2013 00:33:52 GMT

Hi,

You should be using MTU setting of 9000 for the cluster ports. Couple of things...

1. The "Oper Status" of the cluster LIFs is shown as "-". Could you check the lights on the cluster interconnect switch to make sure that there are valid links?

2. Could you send the console logs from the "cluster join" command on the second node?

Re: Network set up error - Cluster join request rejected

VMUNOZ_NTT — Thu, 14 Mar 2013 23:07:40 GMT

Hi,

Finally I fixed the problem. The troubleshooting steps was:

- Set MTU to 1500 in switch ports and controllers cluster ports to isolate if was a VLAN problem, or only just MTU as the error message showed. The results was successful, the second node joined the cluster without problems.

- Set MTU to 9198 on Cisco switch ports. No health alerts reported by the cluster.

- Set MTU to 9000 on controllers cluster ports. No health alerts reported. All is working!!!

Thanks anyway for your help Mrinal