Networking

routing – Why does GRE tunnel has lesser TxBS/RxBS than its physical interface?

Given for instance,

interface Tunnel200
tunnel destination 110.153.1.1

There’s a static route for 110.153.1.1, pointing to physical interface Gi0/0.
Gi0/0 is only used for tunnel200.

Under show interface summary,

the TxBS/RxBS of tunnel200 is always slightly lower than the physical interface Gi0/0.
Shouldn’t it be the other way round as there is overhead for the GRE tunnel?


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