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Table of Contents

Amazon AWS enhanced networking compatibility issue

With this enhancement, there is a compatibility issue with 5.6.2 and older AWS VM versions. After downgrading a 6.2.6 image to a 5.6.2 or older version, network connectivity is lost. Since AWS does not provide console access, you cannot recover the downgraded image.

When downgrading from 6.2.6 to 5.6.2 or older versions, running the enhanced NIC driver is not allowed. The following AWS instances are affected:

C5

C5d

C5n

F1

G3

G4

H1

I3

I3en

Inf1

m4.16xlarge

M5

M5a

M5ad

M5d

M5dn

M5n

P2

P3

R4

R5

R5a

R5ad

R5d

R5dn

R5n

T3

T3a

u-6tb1.metal

u-9tb1.metal

u-12tb1.metal

u-18tb1.metal

u-24tb1.metal

X1

X1e

z1d

A workaround is to stop the instance, change the type to a non-ENA driver NIC type, and continue with downgrading.

Amazon AWS enhanced networking compatibility issue

With this enhancement, there is a compatibility issue with 5.6.2 and older AWS VM versions. After downgrading a 6.2.6 image to a 5.6.2 or older version, network connectivity is lost. Since AWS does not provide console access, you cannot recover the downgraded image.

When downgrading from 6.2.6 to 5.6.2 or older versions, running the enhanced NIC driver is not allowed. The following AWS instances are affected:

C5

C5d

C5n

F1

G3

G4

H1

I3

I3en

Inf1

m4.16xlarge

M5

M5a

M5ad

M5d

M5dn

M5n

P2

P3

R4

R5

R5a

R5ad

R5d

R5dn

R5n

T3

T3a

u-6tb1.metal

u-9tb1.metal

u-12tb1.metal

u-18tb1.metal

u-24tb1.metal

X1

X1e

z1d

A workaround is to stop the instance, change the type to a non-ENA driver NIC type, and continue with downgrading.