> Source: [sk122274](https://support.checkpoint.com/results/sk/sk122274)

# sk122274 - Load Balancers, routes, and Azure Route Tables (UDR) do not update during a failover in Azure Cluster or High Availability

| Property | Value |
|----------|-------|
| Solution ID | sk122274 |
| Date Created | 2018-01-11 |
| Last Modified | 2026-05-11 |
| Technical Level | Advanced |
| Products | Cloud Firewall |
| Versions | R81 (EOS), R81.10 (EOS), R81.20, R82 |
| OS | Gaia |
| Platform | Azure |

## Symptoms

- * During failover, the secondary member does not resolve `login.windows.net` and `management.azure.com`; when the secondary member cannot resolve addresses, the external Load Balancers (LBs), routes, and IPs do not update.
* Azure Route Tables (UDR) are not getting updated automatically on Azure portal once failover to the secondary Security Gateway, hence traffic is getting dropped.

## Cause

The update failure is caused by internal DNS servers in the configuration, which become inaccessible when the Failover is initiated.

## Solution

This solution requires authentication. Please log in to view the full solution.

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