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Title: Why does the MTU need to be modified in QinQ isolation scenario? [Print this page]

Author: admin Time: 2017-5-3 17:45
Title: Why does the MTU need to be modified in QinQ isolation scenario?
Why does the MTU need to be modified in QinQ isolation scenario?

Author: admin Time: 2017-5-3 17:45

The reason is as follows:

In the QinQ scenario, the distribution device adds a two-layer tag to a packet. Compared with the default MTU 1518 on the Ethernet, a four-byte tag is added. To facilitate operation and ensure redundancy, the MTU is uniformly changed to 1530.

Which devices and interfaces need to modify the MTU?

The MTUs of the core interfaces of the upstream aggregation devices and core aggregation interfaces should be set to 1530.

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