topic Re: ISE: Licensing notification connection error to the server in Network Access Control

ISE: Licensing notification connection error to the server

naoki_Japan — Thu, 04 Nov 2021 08:21:12 GMT

A few weeks ago, I applied the license to the ISE nodes.

Today, I found the error message like above.
I thought the loss of the connection to the internet caused this problem.

However, after I made the connectivity to the internet (the ping is reachable from ISE to 8.8.8.8 ), I put the button "Renew Registration". But the above notification still appears.

how could I fix this?

Re: ISE: Licensing notification connection error to the server

balaji.bandi — Thu, 04 Nov 2021 09:40:05 GMT

Does the ISE able to resolve DNS , ISE trying to contact Smart License over the Internet.

Not sure what is the ISE version here, so i provided in General Guide Lines of smart License.

https://www.cisco.com/c/en/us/td/docs/security/ise/2-1/admin_guide/b_ise_admin_guide_21/b_ise_admin_guide_20_chapter_0110.html

Re: ISE: Licensing notification connection error to the server

Mohammed al Baqari — Thu, 04 Nov 2021 10:00:38 GMT

In short check internet connectivity from ISE and nodes. Also confirm they
are bypass from any proxy.

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Re: ISE: Licensing notification connection error to the server

Mate.Barna — Thu, 04 Nov 2021 11:41:43 GMT

Happened to me a couple of months back; first, try pinging software.cisco.com from the router cli and see what it resolves it as (should be 104.86.128.10). If you can ping it, your connection to Cisco licensing is probably fine (L2/L3)

if you've got your DNS records set properly, make sure ipv6 is disabled on the interface you connect out to the internet on - this was an issue for me before on my 1117-4P e.g.

license smart enable
no ipv6 unicast-routing
int gig0/0/0
  no ipv6 address autoconfig
  no ipv6 enable
  no ipv6 nd autoconfig default-route
  no ipv6 dhcp client request vendor

Re: ISE: Licensing notification connection error to the server

naoki_Japan — Mon, 08 Nov 2021 01:25:06 GMT

I am so sorry to everyone who replied to this problem.

I configured the ISE to down load license via Proxy.

This time, I did not set up Proxy , and that error messages were popped up.