Transmitted oversized packets, voice quality issues

Hi All,

I have observed a very high volume of oversized packets being transmitted on my Dell 2048P uplink.

The switch is deployed as an edge device and primarily connects to Cisco phones. PC's and laptops connect to the phones. The voice and data devices are on their own vlan/subnet.

I am having voice quality issues and I'm concerned the oversized packet counter could be contributing to my voice issues.

My system mtu is set to 1518 bytes.

Should I consider changing the MTU to 9216? Many thanks

Interface counters:

FCS Errors: ................................... 0
Single Collision Frames: ...................... 0
Late Collisions: .............................. 0
Excessive Collisions: ......................... 0
Multiple Collisions: .......................... 0
Received packets dropped > MTU: ............... 0
Transmitted oversized packets: ................ 2525180
Internal MAC Rx Errors: ....................... 0
Received Pause Frames: ........................ 0
Transmitted Pause Frames: ..................... 0
Receive Packets Discarded: .................... 29708
Transmit Packets Discarded: ................... 0

User interface configuration

switchport mode general
switchport general pvid 205
switchport general allowed vlan add 205
switchport general allowed vlan add 155 tagged
switchport general allowed vlan remove 1
voice vlan 155
voice vlan auth disable