You configured a GRE tunnel that traverses a path using default MTU settings. You want t o ensure that packets are not dropped or fragmented. In this scenario, what is the maximum packet size that…

The correct answer is A. 1476. The default Ethernet MTU is 1500. There is a 24 b yte GRE overhead, so there remain 1476 bytes for the data packet. https://kb.juniper.net/InfoCenter/index?page=content&id=KB7848&actp=search

BGP

Question

You configured a GRE tunnel that traverses a path using default MTU settings. You want t o ensure that packets are not dropped or fragmented. In this scenario, what is the maximum packet size that would traverse the GRE tunnel?

Options

A1476
B1500
C1400
D1524

How the community answered

(40 responses)

A
83% (33)
B
10% (4)
C
5% (2)
D
3% (1)

Explanation

The default Ethernet MTU is 1500. There is a 24 b yte GRE overhead, so there remain 1476 bytes for the data packet. https://kb.juniper.net/InfoCenter/index?page=content&id=KB7848&actp=search

Topics

#GRE tunnel#MTU#tunnel overhead#packet fragmentation

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