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How to Check/Modify MTU Value on OCI Instances to Avoid Connection Time Outs from On-Premises

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edited Aug 18, 2022 11:03AM in Linux

APPLIES TO:

Oracle Cloud Infrastructure - Version N/A and later

Linux OS - Version Oracle Linux 6.0 to Oracle Linux 7.6 with Unbreakable Enterprise Kernel [4.14.35] [Release OL6 to OL7U6]

Linux x86-64

Linux x86-64 on Oracle Public Cloud

GOAL

The main goal of this document is to explain how to check if the correct MTU size is used on the OCI instances to avoid time outs while connecting to it.

Connecting to OCI Instances on public interface can get time out if the correct MTU is not used, this can be checked with a ping command to determine if the MTU size accepts larger packets, this is explained below.

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