Unable to access out the ros2 topic list

[lyank-ab]

~/Desktop$ ssh unitree@192.168.1.12
unitree@192.168.1.12's password:
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Last login: Wed Feb 4 05:33:52 2026 from 192.168.123.51
ros:foxy(1) noetic(2) ?
1
unitree@ubuntu:$ ros2 topic list
1770154958.143392 [25] ros2: config: //CycloneDDS/Domain/General: 'NetworkInterfaceAddress': deprecated element (file:///home/unitree/.config/cyclonedds/cyclonedds.xml line 5)
/parameter_events
/rosout
unitree@ubuntu:$ ros2 topic list
/parameter_events
/rosout

======================

Earlier it used to show everything, evrey topic list but I am not getting it right now. When clicking in this link, i get the popup as:

Also one more thing,
/home/unitree/cyclonedds_ws/cyclonedds.xml

<?xml version="1.0" encoding="UTF-8" ?>
<CycloneDDS xmlns="https://cdds.io/config" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://cdds.io/config https://raw.githubusercontent.com/eclipse-c>
    <Domain Id="any">
        <General>
            <Interfaces>
                <NetworkInterface name="eth0" priority="default" multicast="default" />
            </Interfaces>
        <AllowMulticast>spdp</AllowMulticast>
        </General>

        <Internal>
                <!--MinimumSocketReceiveBufferSize>50MB</MinimumSocketReceiveBufferSize-->
        </Internal>
    </Domain>
</CycloneDDS>

and

/home/unitree/.config/cyclonedds/cyclonedds.xml

<?xml version="1.0" encoding="UTF-8"?>
<CycloneDDS xmlns="https://cdds.io/config">
  <Domain id="any">
    <General>
      <NetworkInterfaceAddress>192.168.1.12</NetworkInterfaceAddress>
      <AllowMulticast>true</AllowMulticast>
    </General>
    <Discovery>
      <Peers>
        <Peer address="192.168.1.229"/>
      </Peers>
    </Discovery>
  </Domain>
</CycloneDDS>

There are two files . I had tried using ethernet and wifi but not able to access this one.

[lyank-ab]

I had removed the wrong string location "(file:///home/unitree/.config/cyclonedds/cyclonedds.xml)" in the .bashrc but still when running everyhting I am not able to see those topics ? Why what might be the reason?

[b-is-wash-k]

This issue is likely caused by unnecessary or incorrect exporting of the cyclonedds.xml configuration file path in .bashrc.

When a CycloneDDS configuration file is exported (for example using CYCLONEDDS_URI) inside .bashrc, it forces ROS 2 to always load that DDS configuration for every terminal, SSH session, and node, regardless of the actual network interface in use (Ethernet/Wi-Fi) or the runtime context.

If the exported configuration:

• binds DDS to a specific IP address or interface,
• enables unicast-only discovery (Peers),
• or contains deprecated or conflicting parameters,

then DDS discovery can silently fail. In that situation, ROS 2 nodes are still running, but topic discovery does not occur, which is why only /rosout and /parameter_events are visible.

Even after removing the string from .bashrc, the issue may persist until:

• the ROS 2 daemon is restarted, and
• cached DDS participants are cleared.

For this reason, the communication protocol (DDS / RMW settings) should not be modified via .bashrc unless absolutely required. DDS configuration should be applied locally, explicitly, and temporarily, not globally through shell startup files.