--node-ip flag is ignored when rtc.use_external_ip is true in config file (v1.9.2)

[XxCodoxX]

Description

When running livekit-server (v1.9.2) in Docker, the --node-ip command-line flag is ignored if rtc.use_external_ip: true is also set in the loaded livekit.yaml config file. The server continues to use STUN to discover an external IP instead of using the IP provided in the flag.

Expected behavior:
The --node-ip command-line flag should have the highest priority and override any network discovery settings in the livekit.yaml file.

Environment

• LiveKit Server Version: 1.9.2
• Deployment: Docker on a Linux VM (Ubuntu)
• Networking Setup: The VM has two network interfaces (NICs):
  • ens33 (192.168.10.2): Main interface
  • ens34 (192.168.14.2): Dedicated interface for SIP traffic

The goal is to force LiveKit to advertise the SIP interface IP (192.168.14.2) for all media.

Steps to Reproduce

1. Create a docker-compose.yaml file that uses the --node-ip flag:

   services:
     livekit:
       image: livekit/livekit-server:latest
       command: --config /etc/livekit.yaml --node-ip 192.168.14.2
       restart: unless-stopped
       network_mode: "host"
       volumes:
         - ./livekit.yaml:/etc/livekit.yaml
   # ... other services

2. Create a livekit.yaml file with use_external_ip: true:

   rtc:
     tcp_port: 7881
     port_range_start: 50000
     port_range_end: 60000
     use_external_ip: true
   # ... other settings

3. Run the server with sudo docker compose up -d.

• ** Public IP means my server IP

4. Check the server startup logs.

Logs / Evidence

2025-11-03T11:58:53.323Z INFO livekit redis/redis.go:144 connecting to redis {"simple": true, "addr": "localhost:6379"}
2025-11-03T11:58:53.381Z INFO livekit rtcconfig/ip.go:195 found external IP via STUN {"localAddr": "172.17.0.1:55952", "stunServer": "global.stun.twilio.com:3478", "externalIP": "Public IP"}
2025-11-03T11:58:53.382Z INFO livekit rtcconfig/ip.go:195 found external IP via STUN {"localAddr": "192.168.10.2:55952", "stunServer": "global.stun.twilio.com:3478", "externalIP": "Public IP"}
2025-11-03T11:58:58.329Z WARN livekit rtcconfig/ip.go:278 could not validate external IP {"ip": "Public IP", "from": "172.17.0.1:55952", "error": "context canceled"}
2025-11-03T11:58:58.329Z WARN livekit rtcconfig/ip.go:278 could not validate external IP {"ip": "Public IP", "from": "192.168.10.2:55952", "error": "context canceled"}
2025-11-03T11:58:58.407Z INFO livekit rtcconfig/webrtc_config.go:284 failed to get external ip {"local": "192.168.10.2", "err": "context canceled"}
2025-11-03T11:58:58.407Z INFO livekit rtcconfig/webrtc_config.go:284 failed to get external ip {"local": "192.168.14.2", "err": "context canceled"}
2025-11-03T11:58:58.407Z INFO livekit rtcconfig/webrtc_config.go:284 failed to get external ip {"local": "172.17.0.1", "err": "context canceled"}
2025-11-03T11:58:58.407Z INFO livekit rtcconfig/webrtc_config.go:99 no external IPs found, using node IP for NAT1To1Ips {"ip": "Public IP"}
2025-11-03T11:58:58.408Z INFO livekit service/turn.go:145 Starting TURN server {"turn.relay_range_start": 30000, "turn.relay_range_end": 40000, "turn.portTLS": 5349, "turn.externalTLS": true, "turn.portUDP": 3478}
2025-11-03T11:58:58.410Z INFO livekit service/server.go:264 starting LiveKit server {"portHttp": 7880, "nodeID": "ND_VLguBxPXyFM8", "nodeIP": "Public IP", "version": "1.9.2", "bindAddresses": [""], "rtc.portTCP": 7881, "rtc.portICERange": [50000, 60000]}
2025-11-03T11:58:58.724Z INFO livekit.agents service/agentservice.go:298 worker registered {"namespace": "", "jobType": "JT_ROOM", "agentName": "inbound-agent", "workerID": "AW_icWkoHNpNnx4"}

2025-11-03T11:59:54.021Z INFO livekit service/roomallocator.go:166 selected node for room {"room": "open-room", "selectedNodeID": "ND_VLguBxPXyFM8"}
2025-11-03T11:59:54.029Z INFO livekit service/roommanager.go:408 starting RTC session {"room": "open-room", "roomID": "RM_5eGpgZvYMwfq", "participant": "sip_0758238588", "pID": "PA_JBViM64TNBcQ", "remote": false, "room": "open-room", "nodeID": "ND_VLguBxPXyFM8", "numParticipants": 0, "participantInit": {"Identity": "sip_0758238588", "Reconnect": false, "ReconnectReason": "RR_UNKNOWN", "AutoSubscribe": false, "Client": {"sdk": "GO", "version": "2.9.1", "protocol": 16, "os": "linux"}, "Grants": {"Identity": "sip_0758238588", "Kind": "sip", "Video": {"RoomCreate": false, "RoomList": false, "RoomRecord": false, "RoomAdmin": false, "RoomJoin": true, "Room": "open-room", "CanPublish": true, "CanSubscribe": true, "CanPublishData": true, "CanPublishSources": [], "CanUpdateOwnMetadata": true, "IngressAdmin": false, "Hidden": false, "Recorder": false, "Agent": false, "CanSubscribeMetrics": "not-set", "DestinationRoom": ""}, "SIP": {}, "Agent": {}, "Inference": {}, "Observability": {}, "RoomConfig": {"agents": [{"agentName": "inbound-agent"}]}, "RoomPreset": ""}, "Region": "", "AdaptiveStream": false, "ID": "", "SubscriberAllowPause": "not-set", "DisableICELite": false, "CreateRoom": {"name": "open-room", "agents": [{"agentName": "inbound-agent"}]}, "AddTrackRequests": [], "PublisherOffer": {}, "SyncState": {}, "UseSinglePeerConnection": false}}
2025-11-03T11:59:54.031Z INFO livekit service/roommanager.go:994 created TURN password {"username": "RNmQORFN20UaWJkSfKIo47MkCKq8whoyayI0UKJoCC", "password": "kGttYBScgt7hcbM5uqtXQdXodUffJBAj9wCFhPSk6Rx"}
2025-11-03T11:59:54.050Z INFO livekit rtc/room.go:507 participant active {"room": "open-room", "roomID": "RM_5eGpgZvYMwfq", "participant": "sip_0758238588", "pID": "PA_JBViM64TNBcQ", "remote": false, "subscriberCandidates": ["[local][selected:1][trickle] udp4 host Public IP:55743 (resolved: Public IP:55743)", "[local][trickle] tcp4 host Public IP:7881 (resolved: Public IP:7881)", "[local][trickle] udp4 host Public IP:58210 (resolved: Public IP:58210)", "[local][trickle] udp4 host Public IP:57082 (resolved: Public IP:57082)", "[remote][trickle] udp4 host 192.168.10.2:52553", "[remote][trickle] udp4 host 192.168.14.2:40325", "[remote][selected:1][trickle] udp4 host 172.17.0.1:57679", "[remote][trickle] udp4 relay 123.231.30....:36105 related 192.168.10.2:55066"], "connectionType": "udp", "clientInfo": {"sdk": "GO", "version": "2.9.1", "protocol": 16, "os": "linux"}}
2025-11-03T11:59:54.234Z INFO livekit.agents service/agentservice.go:407 assigned job to worker {"jobID": "AJ_Ac8gcB6UrTKQ", "namespace": "", "agentName": "inbound-agent", "jobType": "JT_ROOM", "room": "open-room", "roomID": "RM_5eGpgZvYMwfq", "workerID": "AW_icWkoHNpNnx4"}
2025-11-03T11:59:54.294Z INFO livekit service/roommanager.go:408 starting RTC session {"room": "open-room", "roomID": "RM_5eGpgZvYMwfq", "participant": "agent-AJ_Ac8gcB6UrTKQ", "pID": "PA_KSLvmbtLhDTp", "remote": false, "room": "open-room", "nodeID": "ND_VLguBxPXyFM8", "numParticipants": 1, "participantInit": {"Identity": "agent-AJ_Ac8gcB6UrTKQ", "Reconnect": false, "ReconnectReason": "RR_UNKNOWN", "AutoSubscribe": true, "Client": {"sdk": "PYTHON", "version": "1.0.17", "protocol": 16}, "Grants": {"Identity": "agent-AJ_Ac8gcB6UrTKQ", "Kind": "agent", "Video": {"RoomCreate": false, "RoomList": false, "RoomRecord": false, "RoomAdmin": false, "RoomJoin": true, "Room": "open-room", "CanPublish": true, "CanSubscribe": true, "CanPublishData": true, "CanPublishSources": [], "CanUpdateOwnMetadata": true, "IngressAdmin": false, "Hidden": false, "Recorder": false, "Agent": true, "CanSubscribeMetrics": false, "DestinationRoom": ""}, "SIP": {}, "Agent": {}, "Inference": {}, "Observability": {}, "RoomConfig": {}, "RoomPreset": ""}, "Region": "", "AdaptiveStream": false, "ID": "", "SubscriberAllowPause": "not-set", "DisableICELite": false, "CreateRoom": {"name": "open-room"}, "AddTrackRequests": [], "PublisherOffer": {}, "SyncState": {}, "UseSinglePeerConnection": false}}
2025-11-03T11:59:54.296Z INFO livekit service/roommanager.go:994 created TURN password {"username": "wRFRoxEdi1mdMN1SfKIo47MkCKq8whoyayI0UKJoCC", "password": "6ef01LEgKghgFrmRfyFUprFNB0jWPWV8Hple6k4D9XvA"}
2025-11-03T11:59:54.507Z INFO livekit rtc/room.go:507 participant active {"room": "open-room", "roomID": "RM_5eGpgZvYMwfq", "participant": "agent-AJ_Ac8gcB6UrTKQ", "pID": "PA_KSLvmbtLhDTp", "remote": false, "subscriberCandidates": ["[local][selected:1][trickle] udp4 host Public IP:52940 (resolved: Public IP:52940)", "[local][trickle] tcp4 host Public IP:7881 (resolved: Public IP:7881)", "[local][trickle] udp4 host Public IP:57728 (resolved: Public IP:57728)", "[local][trickle] udp4 host Public IP:58176 (resolved: Public IP:58176)", "[remote][selected:1][trickle] udp4 host 192.168.10.2:51678", "[remote][trickle] udp4 host 192.168.14.2:36665"], "connectionType": "udp", "clientInfo": {"sdk": "PYTHON", "version": "1.0.17", "protocol": 16}}
2025-11-03T11:59:54.892Z INFO livekit.pub rtc/participant.go:2360 mediaTrack published {"room": "open-room", "roomID": "RM_5eGpgZvYMwfq", "participant": "agent-AJ_Ac8gcB6UrTKQ", "pID": "PA_KSLvmbtLhDTp", "remote": false, "kind": "audio", "trackID": "TR_AMwDCNPyv9ePgd", "webrtcTrackID": "70b5952e-86a6-4ff2-b381-c1d9c7f11727", "rid": "", "SSRC": 1367498788, "mime": "audio/red", "trackInfo": {"sid": "TR_AMwDCNPyv9ePgd", "type": "AUDIO", "name": "roomio_audio", "source": "MICROPHONE", "mimeType": "audio/red", "mid": "0", "codecs": [{"mimeType": "audio/red", "mid": "0", "cid": "70b5952e-86a6-4ff2-b381-c1d9c7f11727", "videoLayerMode": "MODE_UNUSED"}], "encryption": "NONE", "stream": "camera", "version": {"unixMicro": 1762171194888710}, "backupCodecPolicy": "PREFER_REGRESSION"}, "fromSdp": true, "isReceiverAdded": true, "sdpRids": ["", "", ""]}
2025-11-03T11:59:55.075Z INFO livekit.pub rtc/participant.go:2360 mediaTrack published {"room": "open-room", "roomID": "RM_5eGpgZvYMwfq", "participant": "sip_0758238588", "pID": "PA_JBViM64TNBcQ", "remote": false, "kind": "audio", "trackID": "TR_AMJtoQphiUgLh9", "webrtcTrackID": "audio", "rid": "", "SSRC": 907341504, "mime": "audio/opus", "trackInfo": {"sid": "TR_AMJtoQphiUgLh9", "type": "AUDIO", "name": "sip_0758238588", "source": "MICROPHONE", "mimeType": "audio/opus", "mid": "0", "codecs": [{"mimeType": "audio/opus", "mid": "0", "cid": "audio", "videoLayerMode": "MODE_UNUSED"}], "encryption": "NONE", "stream": "camera", "version": {"unixMicro": 1762171195074420}, "backupCodecPolicy": "PREFER_REGRESSION"}, "fromSdp": true, "isReceiverAdded": true, "sdpRids": ["", "", ""]}
2025-11-03T11:59:59.029Z INFO livekit agent/client.go:148 not dispatching agent job since no worker is available {"agentName": "inbound-agent", "jobType": "JT_PARTICIPANT", "room": "open-room", "roomID": "RM_5eGpgZvYMwfq"}
2025-11-03T11:59:59.029Z INFO livekit agent/client.go:148 not dispatching agent job since no worker is available {"agentName": "inbound-agent", "jobType": "JT_PUBLISHER", "room": "open-room", "roomID": "RM_5eGpgZvYMwfq"}

[boks1971]

You are correct that --node-ip is not applied when use_external_ip: true.

Can you please elaborate on the use case? If you want to force everything via 192.168.14.2, what is the purpose of the external IP?

We have not had a use case, so it is not supported. use_external_ip: true is the typical deployment and if that is specified, IP is determined automatically.

[XxCodoxX]

Thank you for the clarification. You are correct that my previous config was confusing.

New Test
Based on your reply, I ran a new test: I set rtc.use_external_ip: false in my livekit.yaml.

Result: The server now stops using STUN, but as I suspected, it auto-discovers my main network interface (192.168.10.2) instead of the one I specified in the command line.

Wireshark Proof
I have a Wireshark capture that proves this is happening. When my PBX (at 14.14.14.89) sends an INVITE to my SIP interface (192.168.14.2), LiveKit replies with a 200 OK.

However, the SDP payload inside that 200 OK packet tells the PBX to send the media (RTP) to the wrong IP address.

Here is the SDP from packet (the 200 OK):

Session Description Protocol
Session Description Protocol Version (v): 0
Owner/Creator, Session Id (o): - 5453267 5453269 IN IP4 192.168.10.2
Session Name (s): LiveKit
Connection Information (c): IN IP4 192.168.10.2
Time Description, active time (t): 0 0
Media Description, name and address (m): audio 17381 RTP/AVP 9 97
...
Media Attribute (a): sendrecv
As you can see, the o= and c= lines are advertising 192.168.10.2, not the 192.168.14.2 IP that the SIP message was sent to and replied from.

This confirms that LiveKit is auto-discovering my main NIC (192.168.10.2) and using it in the SDP, instead of respecting the IP I am trying to force.

My Use Case (Elaborated)
This test clarifies my exact scenario, which is a dual-NIC server:

NIC 1 (ens33 at 192.168.10.2): This is the main interface. It is behind NAT and handles standard WebRTC clients who connect via my Public IP.

NIC 2 (ens34 at 192.168.14.2): This is a dedicated, private interface just for SIP traffic. It communicates directly with an internal PBX on the same 192.168.14.x network.

The Core Problem
My goal is to force LiveKit to advertise the SIP interface IP (192.168.14.2) in its SDP for SIP calls, so my internal PBX knows where to send the audio.

My original issue remains: The command: --node-ip 192.168.14.2 flag seems to be ignored.

If use_external_ip: true, LiveKit uses the Public IP in the SDP.

If use_external_ip: false, LiveKit uses the 192.168.10.2 IP in the SDP.

In both cases, the IP I provide in the --node-ip flag is not used.

My Question is: How can I force LiveKit to use the exact IP specified in the --node-ip flag (192.168.14.2) for its SDP candidates, and completely disable all forms of auto-discovery (both STUN and local NIC scanning)?

[boks1971]

Can you share server logs?

[XxCodoxX]

Yes, absolutely. Here is all the information.

1. Architecture Clarification
   First, an important detail about my setup that I didn't mention before:

The LiveKit Server (livekit/livekit-server) is running in one Docker container.

The LiveKit SIP Service (livekit/sip) is running in a separate Docker container.

Both containers are on the same VM, and both are using network_mode: "host". This means they both have direct access to the host's network interfaces (192.168.10.2 and 192.168.14.2).

My livekit-sip container connects to the livekit-server container using ws://127.0.0.1:7880.

2.These logs are from my second test case (where rtc.use_external_ip: false).

These logs directly correspond to the Wireshark capture I posted earlier. You can see the server auto-discovering the wrong IP (192.168.10.2) instead of using the 192.168.14.2 IP I provided in the --node-ip flag.

2025-11-12T08:21:19.026Z INFO livekit service/roomallocator.go:166 selected node for room {"room": "open-room", "selectedNodeID": "ND_7etuhp4Y8vGj"}
2025-11-12T08:21:19.028Z INFO livekit service/roommanager.go:408 starting RTC session {"room": "open-room", "roomID": "RM_DDPQL6GTbxyt", "participant": "sip_0758238588", "pID": "PA_D8w7JLjwHsj4", "remote": false, "room": "open-room", "nodeID": "ND_7etuhp4Y8vGj", "numParticipants": 0, "participantInit": {"Identity": "sip_0758238588", "Reconnect": false, "ReconnectReason": "RR_UNKNOWN", "AutoSubscribe": false, "Client": {"sdk": "GO", "version": "2.9.1", "protocol": 16, "os": "linux"}, "Grants": {"Identity": "sip_0758238588", "Kind": "sip", "Video": {"RoomCreate": false, "RoomList": false, "RoomRecord": false, "RoomAdmin": false, "RoomJoin": true, "Room": "open-room", "CanPublish": true, "CanSubscribe": true, "CanPublishData": true, "CanPublishSources": [], "CanUpdateOwnMetadata": true, "IngressAdmin": false, "Hidden": false, "Recorder": false, "Agent": false, "CanSubscribeMetrics": "not-set", "DestinationRoom": ""}, "SIP": {}, "Agent": {}, "Inference": {}, "Observability": {}, "RoomConfig": {"agents": [{"agentName": "inbound-agent"}]}, "RoomPreset": ""}, "Region": "", "AdaptiveStream": false, "ID": "", "SubscriberAllowPause": "not-set", "DisableICELite": false, "CreateRoom": {"name": "open-room", "agents": [{"agentName": "inbound-agent"}]}, "AddTrackRequests": [], "PublisherOffer": {}, "SyncState": {}, "UseSinglePeerConnection": false}}
2025-11-12T08:21:19.053Z INFO livekit rtc/room.go:507 participant active {"room": "open-room", "roomID": "RM_DDPQL6GTbxyt", "participant": "sip_0758238588", "pID": "PA_D8w7JLjwHsj4", "remote": false, "subscriberCandidates": ["[local][selected:1][trickle] udp4 host 192.168.14.2:56287 (resolved: 192.168.14.2:56287)", "[local][trickle] tcp4 host 192.168.14.2:7881 (resolved: 192.168.14.2:7881)", "[local][trickle] udp4 host 192.168.14.2:55649 (resolved: 192.168.14.2:55649)", "[local][trickle] udp4 host 192.168.14.2:57409 (resolved: 192.168.14.2:57409)", "[remote][trickle] udp4 host 192.168.10.2:52705", "[remote][trickle] udp4 host 192.168.14.2:35382", "[remote][selected:1][trickle] udp4 host 172.17.0.1:57129"], "connectionType": "udp", "clientInfo": {"sdk": "GO", "version": "2.9.1", "protocol": 16, "os": "linux"}}
2025-11-12T08:21:19.093Z INFO livekit.pub rtc/participant.go:2360 mediaTrack published {"room": "open-room", "roomID": "RM_DDPQL6GTbxyt", "participant": "sip_0758238588", "pID": "PA_D8w7JLjwHsj4", "remote": false, "kind": "audio", "trackID": "TR_AM6bdK93DJzHyh", "webrtcTrackID": "audio", "rid": "", "SSRC": 3506332535, "mime": "audio/opus", "trackInfo": {"sid": "TR_AM6bdK93DJzHyh", "type": "AUDIO", "name": "sip_0758238588", "source": "MICROPHONE", "mimeType": "audio/opus", "mid": "0", "codecs": [{"mimeType": "audio/opus", "mid": "0", "cid": "audio", "videoLayerMode": "MODE_UNUSED"}], "encryption": "NONE", "stream": "camera", "version": {"unixMicro": 1762935679093072}, "backupCodecPolicy": "PREFER_REGRESSION"}, "fromSdp": true, "isReceiverAdded": true, "sdpRids": ["", "", ""]}
2025-11-12T08:21:19.231Z INFO livekit.agents service/agentservice.go:407 assigned job to worker {"jobID": "AJ_YyXiAcXiYBmh", "namespace": "", "agentName": "inbound-agent", "jobType": "JT_ROOM", "room": "open-room", "roomID": "RM_DDPQL6GTbxyt", "workerID": "AW_oxi2ZZUqk3jf"}
2025-11-12T08:21:19.290Z INFO livekit service/roommanager.go:408 starting RTC session {"room": "open-room", "roomID": "RM_DDPQL6GTbxyt", "participant": "agent-AJ_YyXiAcXiYBmh", "pID": "PA_Lpi4a5WZu9ey", "remote": false, "room": "open-room", "nodeID": "ND_7etuhp4Y8vGj", "numParticipants": 1, "participantInit": {"Identity": "agent-AJ_YyXiAcXiYBmh", "Reconnect": false, "ReconnectReason": "RR_UNKNOWN", "AutoSubscribe": true, "Client": {"sdk": "PYTHON", "version": "1.0.17", "protocol": 16}, "Grants": {"Identity": "agent-AJ_YyXiAcXiYBmh", "Kind": "agent", "Video": {"RoomCreate": false, "RoomList": false, "RoomRecord": false, "RoomAdmin": false, "RoomJoin": true, "Room": "open-room", "CanPublish": true, "CanSubscribe": true, "CanPublishData": true, "CanPublishSources": [], "CanUpdateOwnMetadata": true, "IngressAdmin": false, "Hidden": false, "Recorder": false, "Agent": true, "CanSubscribeMetrics": false, "DestinationRoom": ""}, "SIP": {}, "Agent": {}, "Inference": {}, "Observability": {}, "RoomConfig": {}, "RoomPreset": ""}, "Region": "", "AdaptiveStream": false, "ID": "", "SubscriberAllowPause": "not-set", "DisableICELite": false, "CreateRoom": {"name": "open-room"}, "AddTrackRequests": [], "PublisherOffer": {}, "SyncState": {}, "UseSinglePeerConnection": false}}
2025-11-12T08:21:19.355Z INFO livekit rtc/room.go:507 participant active {"room": "open-room", "roomID": "RM_DDPQL6GTbxyt", "participant": "agent-AJ_YyXiAcXiYBmh", "pID": "PA_Lpi4a5WZu9ey", "remote": false, "subscriberCandidates": ["[local][selected:1][trickle] udp4 host 192.168.14.2:57756 (resolved: 192.168.14.2:57756)", "[local][trickle] tcp4 host 192.168.14.2:7881 (resolved: 192.168.14.2:7881)", "[local][trickle] udp4 host 192.168.14.2:57896 (resolved: 192.168.14.2:57896)", "[local][trickle] udp4 host 192.168.14.2:52101 (resolved: 192.168.14.2:52101)", "[remote][selected:1][trickle] udp4 host 192.168.10.2:52268", "[remote][trickle] udp4 host 192.168.14.2:37299", "[remote][trickle] udp4 srflx 123.231.30....:52268 related 192.168.10.2:52268"], "connectionType": "udp", "clientInfo": {"sdk": "PYTHON", "version": "1.0.17", "protocol": 16}}
2025-11-12T08:21:19.807Z INFO livekit.pub rtc/participant.go:2360 mediaTrack published {"room": "open-room", "roomID": "RM_DDPQL6GTbxyt", "participant": "agent-AJ_YyXiAcXiYBmh", "pID": "PA_Lpi4a5WZu9ey", "remote": false, "kind": "audio", "trackID": "TR_AMxVRojmaRGqSY", "webrtcTrackID": "c7993c9f-f95a-4d5d-84da-aff1f29bc7ee", "rid": "", "SSRC": 1883829572, "mime": "audio/red", "trackInfo": {"sid": "TR_AMxVRojmaRGqSY", "type": "AUDIO", "name": "roomio_audio", "source": "MICROPHONE", "mimeType": "audio/red", "mid": "0", "codecs": [{"mimeType": "audio/red", "mid": "0", "cid": "c7993c9f-f95a-4d5d-84da-aff1f29bc7ee", "videoLayerMode": "MODE_UNUSED"}], "encryption": "NONE", "stream": "camera", "version": {"unixMicro": 1762935679806781}, "backupCodecPolicy": "PREFER_REGRESSION"}, "fromSdp": true, "isReceiverAdded": true, "sdpRids": ["", "", ""]}
2025-11-12T08:21:24.030Z INFO livekit agent/client.go:148 not dispatching agent job since no worker is available{"agentName": "inbound-agent", "jobType": "JT_PARTICIPANT", "room": "open-room", "roomID": "RM_DDPQL6GTbxyt"}
2025-11-12T08:21:24.030Z INFO livekit agent/client.go:148 not dispatching agent job since no worker is available{"agentName": "inbound-agent", "jobType": "JT_PUBLISHER", "room": "open-room", "roomID": "RM_DDPQL6GTbxyt"}

3. SIP Configuration (sip.yaml)
   Here is the sip.yaml file used by my livekit-sip container:

# LiveKit Server connection details
api_key: ****************
api_secret: *****************************

ws_url: wss://My Domain

redis:
  address: localhost:6379

# SIP settings
sip_port: 5060
rtp_port: 10000-20000

# Network settings
use_external_ip: false 
external_ip: 192.168.14.2

logging:
  level: info

[boks1971]

Looks like server is using 192.168.14.2. See local candidates in this log line

2025-11-12T08:21:19.355Z INFO livekit rtc/room.go:507 participant active {"room": "open-room", "roomID": "RM_DDPQL6GTbxyt", "participant": "agent-AJ_YyXiAcXiYBmh", "pID": "PA_Lpi4a5WZu9ey", "remote": false, "subscriberCandidates": ["[local][selected:1][trickle] udp4 host 192.168.14.2:57756 (resolved: 192.168.14.2:57756)", "[local][trickle] tcp4 host 192.168.14.2:7881 (resolved: 192.168.14.2:7881)", "[local][trickle] udp4 host 192.168.14.2:57896 (resolved: 192.168.14.2:57896)", "[local][trickle] udp4 host 192.168.14.2:52101 (resolved: 192.168.14.2:52101)", "[remote][selected:1][trickle] udp4 host 192.168.10.2:52268", "[remote][trickle] udp4 host 192.168.14.2:37299", "[remote][trickle] udp4 srflx 123.231.30....:52268 related 192.168.10.2:52268"], "connectionType": "udp", "clientInfo": {"sdk": "PYTHON", "version": "1.0.17", "protocol": 16}}

Candidates tagged as [local] are server side candidates and they have 192.168.14.2

[XxCodoxX]

My problem is not with the Agent. My problem is with the SIP participant (participant: "sip_...").

The Wireshark capture I provided earlier is the definitive proof. It shows the SIP 200 OK packet that livekit-server sends to my PBX.

Screenshot of Wireshark
Here is a screenshot of that Wireshark packet (#10). I have highlighted the o= and c= lines in the SDP. You can clearly see they are advertising the wrong IP (192.168.10.2) to the PBX, which is why the audio fails.

Summary:

Agent Connection (Good): The server correctly advertises 192.168.14.2 to the local agent (as your log shows).

SIP Connection (Bad): The server incorrectly advertises 192.168.10.2 to the external SIP PBX (as my Wireshark screenshot proves).

The server seems to be using the --node-ip correctly for some services (like the Agent) but is still auto-discovering the wrong IP for the SIP service's SDP.

Can you please re-examine the SIP SDP generation logic? That is where the bug will be.

[boks1971]

Thank you for the details. Unfortunately, this mode of pinning interfaces is not supported. There is no current plan to support it.

Will update here if this effort gets taken up.

[dangvansam]

@XxCodoxX I'm facing the same issue. Did you find a solution?