[tegra] Fail to send multicast gptp

Autonomous Vehicles DRIVE AGX Orin DRIVE AGX Orin General
1

i just test gptp on mgbe3_0 of tegra,

I’m so confused. that， when the destination mac is multicast mac(01:80:C2:00:00:0E), the other machine cant receive it, when it is a unicast mac or broadcast mac（00:00:00:00:00:01， ff:ff:ff:ff:ff:ff**）, the other machine can receive it, tcpdump on** tegra can capture the packets.

i check the iptable/ebtables/vlan ,

is there any configuration will block the packets.

ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ether 86:79:5c:ce:d1:e0 brd ff:ff:ff:ff:ff:ff
3: mgbe0_0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ether 02:00:00:00:20:16 brd ff:ff:ff:ff:ff:ff
4: mgbe1_0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ether 02:00:00:00:30:16 brd ff:ff:ff:ff:ff:ff
5: mgbe3_0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
link/ether 02:00:92:68:36:11 brd ff:ff:ff:ff:ff:ff
root@tegra-ubuntu:/home/nvidia#

uname -a
Linux tegra-ubuntu 5.10.120-rt70-tegra #8 SMP PREEMPT RT Tue Jul 8 09:33:44 UTC 2025 aarch64 aarch64 aarch64 GNU/Linux
root@tegra-ubuntu:/home/nvidia# cat /proc/device-tree/model
p3663-0001root@tegra-ubuntu:/home/nvidia#
root@tegra-ubuntu:/home/nvidia#
root@tegra-ubuntu:/home/nvidia# cat /etc/nv_tegra_release
cat: /etc/nv_tegra_release: No such file or directory
root@tegra-ubuntu:/home/nvidia# cat /sys/module/tegra_fuse/parameters/tegra_chip_id
cat: /sys/module/tegra_fuse/parameters/tegra_chip_id: No such file or directory
root@tegra-ubuntu:/home/nvidia# cat /proc/device-tree/compatible
nvidia,tegra234root@tegra-ubuntu:/home/nvidia#

2

there is no errors in dmesg

3

Hi there @junwei.he, welcome to the NVIDIA developer forums.

Which “Tegra” aka Jetson device are you using?

Then I can refer you to the correct subcategory where you might find some help.

Thanks!

5

is this ?

6

Yes, that should be enough. That Part number identifies Drive Orin, so the closest topic will be Drive AGX Orin I think. Moving the post there.

Thanks!

7

Dear @junwei.he ,
P3663 is not supported via DRIVE Forum. Could you please reach out to your NVIDIA representative to know right support channel?