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Why is the multicast address 239.255.255.250 invalid?

Why is the multicast address 239.255.255.250 invalid?

Why is the multicast address 239.255.255.250 invalid?

2025-03-10 20:51:31 - last edited 2025-03-12 01:59:29

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Registered: 2025-03-10

Why is the multicast address 239.255.255.250 invalid?

2025-03-10 20:51:31 - last edited 2025-03-12 01:59:29

Tags:

Model: TL-SG3428

Hardware Version: V2

Firmware Version: 2.0.11

Hello,
My switch is set so that unknown multicast groups are discarded.
Now the problem is that SSDP no longer works. The SSDP telegrams seem to be declared as unknown.

The devices respond to the igmp query telegram successfully.

21:47:30.962796 IP 192.168.137.17 > 224.0.0.1: igmp query v2

21:47:32.908624 IP 192.168.137.146 > 239.255.255.250: igmp v2 report 239.255.255.250

21:47:33.108624 IP 192.168.137.146 > 224.0.0.251: igmp v2 report 224.0.0.251

21:47:33.618618 IP 192.168.137.146 > 224.0.23.12: igmp v2 report 224.0.23.12

The multicast addresses do not appear on the “Multicast Info” page.

I have tried to create the multicast group manually. But there the mutlicast address is declared as invalid.

Is there a solution how I can use SSDP with activate “Discard unknown multicast groups”?

0

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#1

2 Accepted Solutions

LV1

2025-03-11 18:34:43 - last edited 2025-03-12 01:59:35

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Registered: 2025-03-10

Re:Why is the multicast address 239.255.255.250 invalid?-Solution

2025-03-11 18:34:43 - last edited 2025-03-12 01:59:35

Hello,
thanks for the answer.

I have tried the beta version 2.30.7 and the error no longer occurs there.

Thank you very much.

Recommended Solution

0

0

#3

2025-03-12 01:59:16 - last edited 2025-03-12 01:59:29

Posts: 7204

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Registered: 2023-06-09

Re:Why is the multicast address 239.255.255.250 invalid?-Solution

2025-03-12 01:59:16 - last edited 2025-03-12 01:59:29

Thanks for posting in our business forum.

Leonoo wrote

@Clive_A

Hello,
thanks for the answer.

I have tried the beta version 2.30.7 and the error no longer occurs there.

Thank you very much.

This new Pre-Release firmware and the following will remove the limitation on SSDP. Now you can configure this multicast address with the version after.

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.

Recommended Solution

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#4

3 Reply

2025-03-11 02:23:48

Posts: 7204

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Re:Why is the multicast address 239.255.255.250 invalid?

2025-03-11 02:23:48

Thanks for posting in our business forum.

We will prepare a beta for your case. See if that works out.

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.

1

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#2

LV1

2025-03-11 18:34:43 - last edited 2025-03-12 01:59:35

Posts: 2

Helpful: 0

Solutions: 1

Stories: 0

Registered: 2025-03-10

Re:Why is the multicast address 239.255.255.250 invalid?-Solution

2025-03-11 18:34:43 - last edited 2025-03-12 01:59:35

Hello,
thanks for the answer.

I have tried the beta version 2.30.7 and the error no longer occurs there.

Thank you very much.

Recommended Solution

0

0

#3

2025-03-12 01:59:16 - last edited 2025-03-12 01:59:29

Posts: 7204

Helpful: 3686

Solutions: 1779

Stories: 0

Registered: 2023-06-09

Re:Why is the multicast address 239.255.255.250 invalid?-Solution

2025-03-12 01:59:16 - last edited 2025-03-12 01:59:29

Thanks for posting in our business forum.

Leonoo wrote

@Clive_A

Hello,
thanks for the answer.

I have tried the beta version 2.30.7 and the error no longer occurs there.

Thank you very much.

This new Pre-Release firmware and the following will remove the limitation on SSDP. Now you can configure this multicast address with the version after.

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.

Recommended Solution

2

2

#4