Wireless Access

Hello,

We have two wireless systems running 8.10.0.17 (one is an overflow as we reached capacity on our primary). 

Each system has an MCR and standby MCR. The MCRs are physical and the model for the primary is ArubaMM-HW-10K and for the overflow is ArubaMM-HW-5K.

The primary has 10x 9240s with 6x 7240XMs in the failover cluster
The overflow has 3x 9240s with 2x 9240s in the failover cluster (all gold licenses)

The primary has 7229 APs in the AP database with 6310 APs up 
The overflow has 4331 APs in the database with 3800 APs up

When I look at the output of 'show ap database' on the primary there is a single AP out of the 6310 APs that are up that doesn't show a standby IP ('0.0.0.0')
But when I look at the output of 'show ap database' on the overflow there are nearly 1,500 APs with no standby IP.

We have enough licenses on the overflow for the number of APs. So I am wondering why this might be? There are less than 4,000 APs on the overflow and the cluster has capacity for 6,000 so shouldn't that mean all APs would have a standby IP?

Thanks,

Guy

Hello,

We have two wireless systems running 8.10.0.17 (one is an overflow as we reached capacity on our primary). 

Each system has an MCR and standby MCR. The MCRs are physical and the model for the primary is ArubaMM-HW-10K and for the overflow is ArubaMM-HW-5K.

The primary has 10x 9240s with 6x 7240XMs in the failover cluster
The overflow has 3x 9240s with 2x 9240s in the failover cluster (all gold licenses)

The primary has 7229 APs in the AP database with 6310 APs up 
The overflow has 4331 APs in the database with 3800 APs up

When I look at the output of 'show ap database' on the primary there is a single AP out of the 6310 APs that are up that doesn't show a standby IP ('0.0.0.0')
But when I look at the output of 'show ap database' on the overflow there are nearly 1,500 APs with no standby IP.

We have enough licenses on the overflow for the number of APs. So I am wondering why this might be? There are less than 4,000 APs on the overflow and the cluster has capacity for 6,000 so shouldn't that mean all APs would have a standby IP?

Thanks,

Guy

AP capacity for the 9240 Gold running AOS 8 is 2048 APs, same as the 7240XM.  Three 9240 in an AOS 8 cluster means capacity for 3072 APs with active and standby tunnels, or 6144 AP connections.  Exceeding the expected cluster capacity with 3800 APs would mean ~1600 APs would only have an active tunnel; 2200 APs with active and standby tunnels, consuming 4400 AP connections, leaving ~1600 connections available for the single-homed APs.

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Carson Hulcher, ACEX#110

Original Message:
Sent: Jul 24, 2025 05:46 AM
From: cauliflower
Subject: standby IPs missing for some APs

Hello,

We have two wireless systems running 8.10.0.17 (one is an overflow as we reached capacity on our primary). 

Each system has an MCR and standby MCR. The MCRs are physical and the model for the primary is ArubaMM-HW-10K and for the overflow is ArubaMM-HW-5K.

The primary has 10x 9240s with 6x 7240XMs in the failover cluster
The overflow has 3x 9240s with 2x 9240s in the failover cluster (all gold licenses)

The primary has 7229 APs in the AP database with 6310 APs up 
The overflow has 4331 APs in the database with 3800 APs up

When I look at the output of 'show ap database' on the primary there is a single AP out of the 6310 APs that are up that doesn't show a standby IP ('0.0.0.0')
But when I look at the output of 'show ap database' on the overflow there are nearly 1,500 APs with no standby IP.

We have enough licenses on the overflow for the number of APs. So I am wondering why this might be? There are less than 4,000 APs on the overflow and the cluster has capacity for 6,000 so shouldn't that mean all APs would have a standby IP?

Thanks,

Guy