ArubaOS and Controllers

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Occasional Contributor II
Posts: 100
Registered: ‎11-05-2009

Incoming network connection delay after controller boots

Whilst configuring some new 3200 and 3600 controllers (running 5.0.1.0) I noticed that after each reboot there was a period of time when I could ping from the controller to the default gateway, but not the other way round. This didn't concern me during the configuration however it appears to be causing a problem with redundancy.

I'm using VRRP with the 3200 controller priority 200 and an existing M3 priority 100. The AP is normally connected to the 3200 and all is fine. If I unplug the controller the M3 takes the VRRP address and there is ~ 6 second outage whilst the AP hands over - no problem here.

When the 3200 power up again, at the point it can talk out, it takes the VRRP address back. However it doesn't accept connection and for ~75 seconds the AP is not on either controller resulting in a loss of service for any clients.

Has anyone seen this before, or have any idea what might be happening?

The 3200 (and 3600) are to be deployed shortly. The existing M3 I was using as backup is currently providing service to ~60 APs.

Cheers,
-Jeff
Guru Elite
Posts: 20,579
Registered: ‎03-29-2007

Lms-ip

Is the LMS-IP for the APs in that group pointed to the VRRP? That 75 seconds sounds like the AP is rebooting and re-discovering the controller, because it is not pointed at the VRRP.


Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Occasional Contributor II
Posts: 100
Registered: ‎11-05-2009

Re: Incoming network connection delay after controller boots




Yes, definitely pointing to the LMS IP address. The handover to the backup controller works fine when the 3200 looses power. I have a console cable connected to the AP and it never reboots. When the VRRP address is handed back to the 3200, the 2 radio LEDs go off and the console output is several messages like

asap_gre_err: Received ICMP (DEST_UNREACH,PROT_UNREACH) from 172.21.207.250 for vap 0:0

172.21.207.250 is the VRRP address.

Cheers,
-Jeff

Guru Elite
Posts: 20,579
Registered: ‎03-29-2007

Time

Is the time between the controllers identical? The time needs to be identical for VRRP to work consistently. Can you please publish your VRRP settings for both sides?


Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Occasional Contributor II
Posts: 100
Registered: ‎11-05-2009

Re: Incoming network connection delay after controller boots

Clocks are identical (both getting from the same NTP source).

3200 Controller:
Virtual Router 9:
Description LincolnsInnField
Admin State UP, VR State MASTER
IP Address 172.21.207.250, MAC Address 00:00:5e:00:01:09, vlan 2113
Priority 200, Advertisement 1 sec, Preemption Enable
Auth type PASSWORD, Auth data: OM]6#a1Z
tracking is not enabled

M3 Controller:
Virtual Router 9:
Description LincolnsInnField
Admin State UP, VR State BACKUP
IP Address 172.21.207.250, MAC Address 00:00:5e:00:01:09, vlan 2113
Priority 100, Advertisement 1 sec, Preemption Enable
Auth type PASSWORD, Auth data: OM]6#a1Z
tracking is not enabled
Guru Elite
Posts: 20,579
Registered: ‎03-29-2007

Preemption


Clocks are identical (both getting from the same NTP source).

3200 Controller:
Virtual Router 9:
Description LincolnsInnField
Admin State UP, VR State MASTER
IP Address 172.21.207.250, MAC Address 00:00:5e:00:01:09, vlan 2113
Priority 200, Advertisement 1 sec, Preemption Enable
Auth type PASSWORD, Auth data: OM]6#a1Z
tracking is not enabled

M3 Controller:
Virtual Router 9:
Description LincolnsInnField
Admin State UP, VR State BACKUP
IP Address 172.21.207.250, MAC Address 00:00:5e:00:01:09, vlan 2113
Priority 100, Advertisement 1 sec, Preemption Enable
Auth type PASSWORD, Auth data: OM]6#a1Z
tracking is not enabled




can you turn off Preemption on both sides?


Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Occasional Contributor II
Posts: 100
Registered: ‎11-05-2009

Re: Incoming network connection delay after controller boots




Will do.

I'm not going to be physically on site until tomorrow so will test then.

Occasional Contributor II
Posts: 100
Registered: ‎11-05-2009

Re: Incoming network connection delay after controller boots




Got to it earlier than expected.

With preemption turned off, the M3 controller becomes VRRP MASTER as before and the AP moves over within 6 seconds as expected - however now the 3200 controller has come back to life, it is showing as VRRP BACKUP and not MASTER and the AP is still on the M3 and not the 3200. How do I get the VRRP MASTER back to the 3200?

Guru Elite
Posts: 20,579
Registered: ‎03-29-2007

Preemption

Turn on Preemption ONLY on the Master Side.


Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Occasional Contributor II
Posts: 100
Registered: ‎11-05-2009

Re: Incoming network connection delay after controller boots




Now that I've enabled it on the 3200 controller, when rebooting the controller I long period where it takes the VRRP address back, but the AP can't connect as I did previously.

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