Chromatic Producer I

Xfinity XB8 - Link Local Address Issues

2 replies
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I recently experienced a total network failure of my Xfinity XB8 Modem. I have numerous wired and wireless SONOS devices connected that started dropping out and overall slow network performance.

Xfinity replaced the XB8 modem, and the issues continued with SONOS. I then turned off all SONOS equipment and the network issues were resolved. I verified the configuration of the three TP-LINK Managed Ethernet switches and confirmed that everything was correct (RST Settings).

I then turned on all of the computers, NAS and printers and the network remained stable. I then turned on each of the wired SONOS devices and the network was stable until I turned on the PORT and the PLAYBAR and the network became unstable and unusable. Each SONOS device is plugged into a TP-LINK managed switch.

I then ran Wireshark and noticed an excessive number of “LINK LOCAL ADDRESS” broadcast coming from the XB8 Modem with the Source Address starting with fe80:: - ICMP V6. I then turned off both SONOS devices and the network returned back to normal. NOTE: While this broadcast was occurring the SONOS app was very slow to respond, network printing was generating errors and the browsers were slow,

I have been working on this all day and will do some more trouble shooting tomorrow so I can isolate the specific SONOS product that is causing the issue. I suspect it may be the PORT since it took a very long time to connect to the network.

Has anyone else run into this?

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Pools-3015

Prodigy I

It still sounds like you are experiencing a broadcast storm.

What Priority settings do you use on the switches that Sonos devices are connected to?

P

PLCMAN58Author

Chromatic Producer I

STP = Enabled, STP Priority = 128 STP Path Cost = 10 on all ports with SONOS connected. This switch (TP-LINK T2500G-10TS) is connected to an upstream TP-LINK switch and that port STP Priority = 128 and Path Cost = 4.

The upstream TP-LINK (T2600G-52TS) Switch Port is configured as STP Enabled, STP Priority = 128 and Path Cost = 4.

These are the setting that have used for seven years, and the system has been extremely stable without any issues until about 1 week ago.

On all other switch ports STP is disabled.

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