DNA node hostname update

[LAN team]

Hello,

Is it possible to update each DNA node hostname once the cluster is already deployed ?

Thx.

[balaji.bandi]

Technically speaking that is possible and i believe you need to run the maglev to re-initiate to join the cluster.

Note : DNAC is bit complicated - that is reason planning is very important.

if any difficulties contacting TAC is sensible approach.

[Torbjørn]

You should be able change the hostnames using "sudo maglev-config update" on each node. If this is a system in production I would consult Cisco TAC before proceeding.

[LAN team]

Hello,

Already tried, then I can change IP/MASK/GATEWAY/DNS server, cluster name, but not the node hostname :

[Tomas de Leon · Accepted solution]

So we need to be clear on the term "hostname" in the Context with the Cisco Catalyst Center.

Context-1:
There is a "Cluster" Hostname which is configured during the Maglev Install Wizard or the maglev-config update command. This "Hostname" is for the Cisco DNA Cluster not a node hostname.

Context-2:
There is a DNS Hostname which resolves to an IP Address. This is configured in your DNS Services Deployment not the Cisco Catalyst Center.

For Example, this example is a 3-Node Cluster with the interface configuration for Management, Enterprise, and Cluster interfaces on each node.

Node-1     IP Address     FQDN
Managememt 172.16.100.1   node1-mgmt.dna.local
Enterprise 192.168.100.1  node1-mgmt.dna.local
Cluster    1.1.1.1

Node-2     IP Address     FQDN
Managememt 172.16.100.2   node2-mgmt.dna.local
Enterprise 192.168.100.2  node2-mgmt.dna.local
Cluster    1.1.1.2

Node-3     IP Address     FQDN
Managememt 172.16.100.3   node3-mgmt.dna.local
Enterprise 192.168.100.3  node3-mgmt.dna.local
Cluster    1.1.1.3

VIP Int    IP Address     FQDN
VIP-Mgmt   172.16.100.99
VIP-Ent    192.168.100.99 cluster-hostname.dna.local
VIP-Cl     1.1.1.99

Context-3:
The picture that you includes displays hostnames that may reflect what is in Context-2 or can be some internal names. This is a known UI/UX behavior that will not be corrected at this time.

[LAN team]

Indeed, once DNS updated, the names is pcitures are also updated.

Thank you,