What is the maximum number of interface aliases supported in Red Hat Enterprise Linux?

Solution Unverified - Updated 2015-05-27T00:53:41+00:00 -

English

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Environment

• Red Hat Enterprise Linux 7
• Red Hat Enterprise Linux 6
• Red Hat Enterprise Linux 5

Issue

• How many network interfaces aliases does Red Hat Enterprise Linux support?
• What is the maximum number of interface aliases I can use on Red Hat Enterprise Linux?

Resolution

There is no practical limit.

Root Cause

In Linux kernel 2.2 there was a limit of 255 interfaces.

In modern Linux kernels, interfaces and IP addresses are implemented as a linked list, removing any hard limit of these items.

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