Description of problem:

Currently when ovs-tcpdump create a mirror port, it adjust mtu of the mirror port based on the mtu of the target port[1].
 https://mail.openvswitch.org/pipermail/ovs-dev/2017-February/329030.html

However this adjustment doesn't work for dpdk-bond. We need to manually adjust mtu of the mirror port if physical interfaces of the bond has MTU larger than the default (1,500).

Version-Release number of selected component (if applicable):
openvswitch-test-2.9.0-110.el7fdp.noarch and RHEL7.7

How reproducible:
Always

Steps to Reproduce:
1. Create a dpdk bond and set mtu 9000 on physical interfaces
2. Take packet capture on the dpdk bond port by ovs-tcpdump

Actual results:
The mirror port has mtu 9,000 and packets are captured properly

Expected results:
The mirror port has mtu 1,500 (default) and no packets are captured

Additional info: