Troubleshooting High Availability

Configuration guides, troubleshooting and practical advice for AZTCOFW.

Articles

7 results

Both Systems Appear as MASTER

This will happen if the secondary cannot see the CARP advertisements from the primary. Check for firewall rules, connectivity trouble, switch configurations. Also check the system logs for any relevant errors that may le

Common Misconfigurations

There are several common misconfigurations that happen which prevent HA from working properly. Incorrect Interface Order The interface assignment order and internal identifiers must match identically on both nodes. If th

Configuration Synchronization Problems

Double check the following items when problems with configuration synchronization are encountered: The username must be admin on all nodes. The password in the configuration synchronization settings on the primary must m

HA and Multi-WAN Troubleshooting

If trouble is encountered reaching CARP VIPs from when dealing with Multi-WAN, double check that a rule is present like the one mentioned in FirewallConfiguration

Incorrect Hash Error

There are a few reasons why this error turns up in the system logs, some more worrisome than others. If CARP is not working properly when this error is present, it could be due to a configuration mismatch. Ensure that fo

Other Switch and Layer 2 Issues

If the units are plugged into separate switches, ensure that the switches are properly trunking and passing broad- cast/multicast traffic. Some switches have broadcast/multicast filtering, limiting, or “storm control” fe

Primary system is stuck as BACKUP

In some cases, this is may happen normally for a short period after a system comes back online. However, certain hardware failures or other error conditions can cause a server to silently take on a high advskew of 240 in