Hi,
You should check with Telecom team or evaluate the switch port configuration if the jumbo frame is enabled, MTU = 9000.
The same configuration must be verified in the network interface settings.
A great way to check if the configuration is missing at one of the points is checking if there are dropped packages with the command 'ifconfig -a':
[root@<hostname> ~]# ifconfig -a
bond0: flags=5187<UP,BROADCAST,RUNNING,MASTER,MULTICAST> mtu 9000
inet Ip.Ad.re.ss netmask net.m.as.k broadcast bro.d.ca.st
ether XX:XX:XX:XX:XX:XX txqueuelen 1000 (Ethernet)
RX packets 522849928 bytes 80049415915 (74.5 GiB)
RX errors 274721 dropped 276064 overruns 0 frame 274721
TX packets 520714273 bytes 72697966414 (67.7 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
In this case, jumbo frame is configured only in network interface.
Regards,
Caseiro.