# Not possible to configure the total number of IPv4 and IPv6 CoreXL Firewall instances to more than 64 when the Security Gateway runs in the USFW mode

**Product**: CoreXL  
**Version**: R80.30 (EOS), R80.40 (EOS), R81 (EOS), R81.10 (EOS), R81.20  
**OS**: Gaia  
**Last Modified**: 2025-01-20

## Symptoms
- It is not possible to configure the total number of IPv4 CoreXL Firewall instances and IPv6 CoreXL Firewall instances to more than 64 when the Security Gateway with more than 64 CPU cores runs in the USFW mode ( [sk167052](https://support.checkpoint.com/results/sk/sk167052)).

## Cause
There is a hard-coded total limit of 64 CoreXL Firewall instances.

## Solution
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#### NOTE
This solution has been verified for the specific scenario, described by the combination of Product, Version and Symptoms. It may not work in other scenarios.

## Article Properties
**Access Level**: Advanced  
**Status**: Approved by TAC  
**Date Created**: 2023-08-22  
**Last Modified**: 2025-01-20