ISE v1.2 patch PSN 5 down, deleted endpoint identity

Please refer to the diagram. I'll make it simple and clear.

Patch version 1.2 of ISE 5

3xPOL (2xVirtual devices)

1 LUN

1 Admin

Since Janauray the 8th we have problems with ISE. problem encounter were end of endpoint profiling devices like (Cisco 1140 AP) but the devices is a portable Motorola running Windows CE. Also the mac address of Motorola deleted endpoint identity, every 4 to 6 hours, and we need to put the mac address manually to start the authentication to work.

We open a cisco with TAC. and TAC advice there is a bug in the software and must be upgraded to patch 17 or be upgraded to 1.4 as EHT it more stable than version 2.

a few days later after one of the node POL3 (in the language of cisco PSN) went down. and one of our clinets SSID WiFi lost the connection that they were unable to authenticate (security WLC are on POL3 with ISE group created AD HOC Network devices with filtering MAC.) to solve the problem, we change the WLC AAA to POL1 (PSN) security to make it work. given that his work.

later the next day an another POL2 (up/down beat) other clients of SSID (DATA) are starting to declare connection drop. change us again the WLC AAA authentication ip in the direction to POL1 since his works very well.

now on 3 only 1 POL's work and three SSIDS end clinet is authenciated by the ip address of this POL.

We arrived at cisco help, they looked in this and said POL node are not syn. so EHT needs a reboot to fix this. US management decided if this requires a reboot to fix theye why do not upgrade us to version 1.4 EHT. Cisco TAC mention upgrade can take up to 3 to 4 hours, or maybe more depends on the server. Now we want to go to upgrade but our network structure is complex, we do not want to lose the ise for 3 to 4 hours. We are a hospital and all verification devices/doctor patients computers/handheld devices/records are authenticated through ISE. We using ISE mainly for the wireless.

Now, it's the background story. now, I have a question can reload us the POL nodes 1 by 1 to resolve this problem. I also noticed there is another work around, we had another node ISE from another hospital of trust in our data center. It is a virtual appliance (ise - psn.web.com) in our controller ip address SSID (WLC) one of our leading hospitals of authentication setting two AAA is POL1 and next is the ip address of the ISE - PSN. WEB.COM if we recharge our ise and wlc, we note the ip address of the ISE - PSN. WEB.COM will be this keep the SSID client remains connected.

Please let know us that we are in a desperate situation where we need advice to minumis downtime of our patient critical application that are connected wirelessly.

Hi there and sorry you are in such a crappy situation. It's no funny!

To answer your questions:

#1. I would certainly recommend the upgrade to a later version of ISE or at least get your current version on the last patch!

#2. Yes, you can reload the Ssnp one at a time with zero and without interruption of service. Your WLC detects that your first PSN is down and then move to the second that is configured under the SSID > AAA servers. It is very important that your PSN is in a node group. This way if the PSN-1 goes down, none of the sessions that have been in the middle of the AAA process will get absorbed by another node in node group. If the PSN is not in a group of clients node trying to authenticate to the network at the time of charging will have to start again.

#3. Once that clients are authenticated and authorized their rail traffic is no longer the PSN. So, reload the PSN will not affect clients that are already on the network. However, if a customer needs to re-auth (in due to inactivity, slowed down or re-auth timer) then a job THAT PSN is necessary, otherwise the AAA session will fail.

#4. Certainly, you can set up a third NHPS under your SSID and use your PSN which is in another hospital. As long as this node is located in the same deployment of ISE and is synchronized with the PAN then you should be good to go. You can quickly test it by creating a temporary SSID > do as PSN its main Radius Server > test it with a test computer.

I hope this helps!

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Tags: Cisco Security

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