Cisco DNA Center nodes lost network connectivity. Cannot SSH to nodes. Cluster and Enterprise port connected to Cisco Nexus Switches.
Cisco DNA Center kernel logs showing hung queue error messages. "sudo cat /var/log/kern.log"
Disable DCBX by configuring the below CLIs on the Cisco Nexus switch ports to which Cisco DNA Center appliances are connected prior to the Cisco DNA Center install
Configure below on all portsEnterprise port and Cluster port where Cisco DNA-Center is connected
no priority-flow-control mode auto
no lldp transmit
no lldp receive
Note: The first command that is shown above once applied doesn't show up in running-config for example when you execute "sh run int e1/1"
As a best practice, to avoid hitting the above problem we recommend that you configure above-mentioned CLIs on Cisco Nexus switch portsprior to the installation of Cisco DNA Center but if the Cisco DNA Center was already installed without applying the above CLIs and you are seeing the above symptom, in some cases above solution plus the reboot of the Cisco DNA Center nodes will fix the network connectivity.
However, it is strongly recommended that you open up a Cisco TAC case and work with the TAC engineer to assist them to troubleshoot if it is a production and or pilot deployment. There is also an internal defect raised for this problem and you could suggest TAC to lookup for faster resolution.
Saludos! Tengo un problema con un router, el mismo me indica a través de un sistema de monitoreo: "Memory threshold crossed". Ingreso al enrutador, verifico la memoria disponible, por ejemplo: indica que tiene 258 M available, entonces procedo a aplicar e...
We deployed a script to shutdown switch ports that are down for a specific period of time. The TCL script is copied into flash and the cron timer executes it. Zero issues with the running of this script for years. One issue now is if a switch is rep...
Hello, I have run into an "issue" that I cannot seem to crack.... I have a C9300-24UX running version 16.6.2 and a WS-C3560X-48 running version 12.2(53)SE2. I had a wireless AP connected to the 3560 that was getting around 250Mbps, and when that same...
Hello, I'm trying to built DMVPN using IKEv2 Between ISR4431 and ISR4321, but tunnel is not establishing. With other devices (c1900, ISR4331) tunnels are successfully established, but not with ISR4321(IOS Version is isr4300-universalk9.03.16.04b.S.15...
Hi Community, I am tasked with taking our single internet connection (4Gbps) and carve in two lanes. One lane will service normal traffic; internet, vpn, remote access, telephony, etc. The second lane would be dedicated to send backups data to ...