Hello Everyone,

Looks to be related to the team interface after all, which is strange.

Have confirmed that after getting rid of the LACP/Team interface, media is flowing as expected after kernelization.

I simply:

• removed the LAG config on the switch
• disabled the team0 interface
• Moved the public IP over to eno1
• moved the carrier VLAN’s over to eno1

Restarted for good measure, and made some test calls.  All worked perfectly with media traversing the public and carrier interfaces as expected.

rtpengine -v1

> Version: git-HEAD-5bf2c50a

> CentOS Stream release 8

> Linux 4.18.0-373.el8.x86_64

Is it worth opening an issue in the rtpengine repo?

Cheers,

Tim

From: Tim Bowyer <timbo@timbo.au>
Sent: Wednesday, March 29, 2023 3:26 PM
To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
Subject: [SR-Users] Re: Rtpengine: no audio after kernelization.

Appreciate the help Richard!

Media is traversing the team0 link <> one of the two carrier vlan’s as per:

team0: connected to Team connection 1

        "team0"

        team, 50:9A:4C:XX:XX:XX, sw, mtu 1500

        ip4 default

        inet4 203.x.x.x/27

        route4 203.x.x.x/27 metric 350

        route4 default via 203.x.x.x metric 350

carrierX180: connected to carrierX180

        "carrierX180"

        vlan, 50:9A:4C:XX:XX:XX, sw, mtu 1500

        inet4 10.x.x.x/28

        route4 10.x.x.x/28 metric 401

        route4 202.x.x.x/27 via 10.x.x.x metric 401

        route4 10.x.x.x/30 via 10.x.x.x metric 401

        inet6 fe80::xxx/64

        route6 fe80::/64 metric 1024

carrierY178: connected to carrierY178

        "carrierY178"

        vlan, 50:9A:4C:XX:XX:XX, sw, mtu 1500

        inet4 10.x.x.x/28

        route4 10.x.x.x/28 metric 400

        //CUT//

        inet6 fe80::xxx/64

        route6 fe80::/64 metric 1024

Cheers,

Tim

From: Richard Fuchs <rfuchs@sipwise.com>
Sent: Friday, March 24, 2023 8:51 PM
To: sr-users@lists.kamailio.org
Subject: [SR-Users] Re: Rtpengine: no audio after kernelization.

On 22/03/2023 08.19, [EXT] Tim Bowyer wrote:

Evening!

I ditched firewalld and swapped to configuring iptables manually…

I’ve also made some basic calls with media going in/out of the same interface and I’m still seeing the audio stop completely or become one-way once kernelized.

On the two different interfaces, I get no-way audio once kernelized.  Weird!

Could this be related to the kernel module being unsigned (running CentOS 8 Stream)?

kernel: xt_RTPENGINE: loading out-of-tree module taints kernel.

kernel: xt_RTPENGINE: module verification failed: signature and/or required key missing - tainting kernel

kernel: Registering xt_RTPENGINE module - version git-HEAD-5bf2c50a

systemd-modules-load[781]: Inserted module 'xt_RTPENGINE'

No, that is expected and perfectly fine.

Have been pulling my hair out! 

[root@blahblah zgadmin]# iptables -L

Chain INPUT (policy ACCEPT)

target     prot opt source               destination        

rtpengine  udp  --  anywhere             anywhere           

ACCEPT     all  --  anywhere             anywhere             ctstate RELATED,ESTABLISHED

ACCEPT     icmp --  anywhere             anywhere           

//cut//

Chain FORWARD (policy ACCEPT)

target     prot opt source               destination        

Chain OUTPUT (policy ACCEPT)

target     prot opt source               destination        

Chain rtpengine (1 references)

target     prot opt source               destination        

RTPENGINE  udp  --  anywhere             anywhere             RTPENGINE id:0

That looks fine. How about the actual network setup? Any network namespaces, policy routing, or other unusual setup in place?

Cheers