From 6537830a239bff6a87a6dba27f9389f7c953154c Mon Sep 17 00:00:00 2001
From: Wei Zhou <weizhou@apache.org>
Date: Mon, 7 Sep 2026 11:03:59 +0200
Subject: [PATCH] server: Fix reservedIpAddressesAmount calculation for
 non-IPv4 VLANs

Only compute the reserved IPv4 address count when the VLAN is IPv4,
avoiding incorrect long arithmetic on start/end IP for IPv6-only VLANs.
---
 .../java/com/cloud/configuration/ConfigurationManagerImpl.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/src/main/java/com/cloud/configuration/ConfigurationManagerImpl.java b/server/src/main/java/com/cloud/configuration/ConfigurationManagerImpl.java
index 4d91c0f4f992..94acaf7cc42e 100644
--- a/server/src/main/java/com/cloud/configuration/ConfigurationManagerImpl.java
+++ b/server/src/main/java/com/cloud/configuration/ConfigurationManagerImpl.java
@@ -4843,7 +4843,7 @@ public Vlan createVlanAndPublicIpRange(final CreateVlanIpRangeCmd cmd) throws In
         }
 
         long reservedIpAddressesAmount = 0L;
-        if (forVirtualNetwork && vlanOwner != null) {
+        if (ipv4 && forVirtualNetwork && vlanOwner != null) {
             reservedIpAddressesAmount = NetUtils.ip2Long(endIP) - NetUtils.ip2Long(startIP) + 1;
         }