jdk21: java/net/MulticastSocket/IPMulticastIF.java jdk/jfr/event/runtime/TestNetworkUtilizationEvent.java consistently fail on test-ibmcloud-win2012r2-x64-2

java/net/MulticastSocket/IPMulticastIF.java
jdk/jfr/event/runtime/TestNetworkUtilizationEvent.java

Consistently fail on test-ibmcloud-win2012r2-x64-2 https://ci.adoptium.net/job/Grinder/7566/

The error message for [jdk/jfr/event/runtime/TestNetworkUtilizationEvent.java.TestNetworkUtilizationEvent](https://ci.adoptium.net/job/Grinder/7566/testReport/jdk_jfr_event_runtime_TestNetworkUtilizationEvent/java/TestNetworkUtilizationEvent/)

```
java.lang.RuntimeException: Value not atMost 2147483647000, field='writeRate', value='2324762402768': expected that 2324762402768 <= 2147483647000
at jdk.test.lib.Asserts.fail(Asserts.java:594)
at jdk.test.lib.Asserts.assertLessThanOrEqual(Asserts.java:154)
at jdk.test.lib.jfr.EventField.lambda$atMost$5(EventField.java:82)
at jdk.test.lib.jfr.EventField.doAssert(EventField.java:116)
at jdk.test.lib.jfr.EventField.atMost(EventField.java:82)
at jdk.jfr.event.runtime.TestNetworkUtilizationEvent.main(TestNetworkUtilizationEvent.java:75)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1583)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Value not atMost 2147483647000, field='writeRate', value='2324762402768': expected that 2324762402768 <= 2147483647000
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Value not atMost 2147483647000, field='writeRate', value='2324762402768': expected that 2324762402768 <= 2147483647000
```

java/net/MulticastSocket/IPMulticastIF.java
```
16:57:36 --- testSetGetInterfaceBound bindAddr=[tst-ibm-w2012x2/169.48.4.139:0], nif=[name:tunnel_5 (Microsoft 6to4 Adapter)]
16:57:36 test IPMulticastIF.testSetGetInterfaceBound(tst-ibm-w2012x2/169.48.4.139:0, java.net.NetworkInterface@10bd62de): failure
**16:57:36 java.net.SocketException: Network interface not configured for IPv4**
16:57:36 at java.base/sun.nio.ch.Net.newSocketException(Net.java:193)
16:57:36 at java.base/sun.nio.ch.Net.translateToSocketException(Net.java:179)
1
```

Start with java/net/MulticastSocket/IPMulticastIF.java and jdk/jfr/event/runtime/TestNetworkUtilizationEvent.java, then review the linked Grinder run and failure traces. Investigate why these tests fail on test-ibmcloud-win2012r2-x64-2, including the IPv4 interface and writeRate assertions. Done means both tests pass reliably on the affected Windows test host.

Written by the indexing model from the issue text.