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Should an AP reboot when it acquires a new lease?

Hi


Strange one - today all of our RAPS in one office location rebooted.

 

The lease time is set to 7 days.

 

All of the other offices AP (RAPS) have an up time of 14 days currently - they are also set to renew a lease every 7 days.

 

So my question is should the AP of rebooted if it has been given a new IP?  When checking the logs I see the below:

 


Reboot Information
------------------
AP rebooted Wed Sep 19 14:59:21 UTC 2018; Entering REBINDING state; t1 25197 t2 25200 lease 28800 (saved_ip 192.168.12.18 yiaddr 192.168.12.11 saved_router 192.168.12.1 new_router 192.168.12.1)
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

 

Thanks

Re: Should an AP reboot when it acquires a new lease?


@scottm wrote:

Hi


Strange one - today all of our RAPS in one office location rebooted.

 

The lease time is set to 7 days.

 

All of the other offices AP (RAPS) have an up time of 14 days currently - they are also set to renew a lease every 7 days.

 

So my question is should the AP of rebooted if it has been given a new IP?  When checking the logs I see the below:

 


Reboot Information
------------------
AP rebooted Wed Sep 19 14:59:21 UTC 2018; Entering REBINDING state; t1 25197 t2 25200 lease 28800 (saved_ip 192.168.12.18 yiaddr 192.168.12.11 saved_router 192.168.12.1 new_router 192.168.12.1)
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

 

Thanks


Why would the RAPs not renew their existing IP address? With a 7 day lease, they should be successfully renewing around 3.5 days into the lease. 

 

If the IP changes, then the connection will be interrupted as a new IPSec connection needs to be negotiated between the RAP and controller for passing the GRE tunnels and PAPI needed. 


Charlie Clemmer
Aruba Customer Engineering
MVP

Re: Should an AP reboot when it acquires a new lease?

I am honestly not sure but I have now changed the DHCP options to be static for the APs.


I just wondered if the AP received a new IP would this cause it to reboot because previously i didnt think this was the case?

Super Contributor II

Re: Should an AP reboot when it acquires a new lease?

Perhaps the DHCP renews that are unicast towards the DHCP server from the AP subnet is not allowed in a firewall or ACL somewhere in this office? That would make the AP lease move all the way through the 7 days and then the lease is invalid and it would go about doing a broadcast DHCP discover again. Since the lease on the server side has also expired by then it might recieve a different IP.

 

Cheers,

Christoffer Jacobsson | Aranya AB
Aruba Partner Ambassador
Aruba: ACMX #537 ACCP ACDP | CWNP: CWNE #306

Re: Should an AP reboot when it acquires a new lease?

If the AP receives a different ip address, then yes it will reboot.  As other said, ordinarily though with the renew happening at half, then 3/4 of the lease then it should always receive the same.


If my post is helpful please give kudos, or mark as solved if it answers your post.

ACCP, ACCX #817, ACMP, ACMX #294
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