How To: Configure Yealink Phones' Network Storm Filters

Before continuing in this article you may need to review how to apply configuration parameters to VoIP devices.

Yealink Storm Filtering Settings Explained

1️⃣ Storm Filtering Mode

network.storm_filtering_mode

Determines which interfaces the phone applies storm filtering to:

Tip: Usually just using the value of 1 (Phone only) is sufficient.

2️⃣ Storm Filtering Speed

network.storm_filtering.lan_speed 
network.storm_filtering.wan_speed 
network.storm_filtering.mii_speed 

Specifies the link speed for the interface to calculate thresholds:

Tip: Match this to your actual network speed. Most Yealink phones use 3 (1000Mbps).

3️⃣ Storm Filtering Level 

network.storm_filtering.lan_bsp_level
network.storm_filtering.wan_bsp_level
network.storm_filtering.mii_bsp_level

This setting controls how aggressively the phone filters broadcast/multicast packets:

• Values: 1–5 (higher = more aggressive)
• Start at 3 (default/recommended)
• Increase if the phone is overwhelmed by traffic
• Decrease if legitimate traffic (like multicast paging) is blocked

Tip: Think of it as a volume knob for filtering: 1 = mild, 5 = max.

✅ Example Setup for a 100 Mbps Office Phone

network.storm_filtering_mode="1"
network.storm_filtering.lan_speed="3" 
network.storm_filtering.wan_speed="3"
network.storm_filtering.mii_speed="3"
network.storm_filtering.lan_bsp_level="3" 
network.storm_filtering.wan_bsp_level="3" 
network.storm_filtering.mii_bsp_level="3"

Note: Applying these settings to a phone will force the phone to reboot.