WAN interface on 1590 with /31 Subnet Mask

[pnormanmtvh]

Hi,

We are in the middle of a rollout of several 1590's to our sites. One issue that we experienced yesterday was statically assigning an IP address to the WAN interface with a /31 subnet mask. It allowed the assignment of the public IPaddress & SM but would not connect to the Internet. It was a connection to BT and they regularly use these /31 subnet masks to conserve IP space. We got around the problem by assigning a /28 subnet mask instead but this is not ideal.

Has anyone else seen this issue? Is it likely to get fixed in a future firmware release for these 1590's?

Thanks

pnormanmtvh

[PhoneBoy]

Have you opened a TAC case on this?

[PhoneBoy]

Supposedly this is supported in R80.20.x codebase (and also in R77.20.80+).
Recommend a TAC case.

[the_rock]

Hm, weird...I had seen people use /31 mask on other CP models, and it does work, but never seen it on 1590. Not sure if its firmware limitation...

[Danh · Accepted solution]

Hi, 

As PhoneBoy stated here, it should work on the 1590 but it seed the feature support got broken sometimes around R80.20.15. 

Thanks for bringing it up. Please open a TAC case. Once we have it solved we can offer you to try the fix. 

[pnormanmtvh]

Thanks - TAC number is 6-0002653960

[Danh]

Thanks.

TAC should return shortly with an image with a fix for you to try.

[Anis-BenMbarek]

Hi,

I have the same issue and my customer ask me if the Appliance 1570 can support the /31 for the interface wan. I can't open a case yet because the Appliance is being purchased.

The mask /31 is it fixed and supported in R80.40 and earlier ?

Thank you for your help!

[Chris_Atkinson]

It was fixed in R80.20.30, what release are you running on the 1570?

[Marco32]

Hi Chris,

I'm running R80.20.50 on 1570R and I can't configure /31 subnet. Can you assist me to solve this issue?

There's a fix for it?

Regards

M

[Chris_Atkinson]

If you suspect there was a regression please contact TAC to investigate but it should work in current firmware versions.

[Marco32]

Hi Chris,

which version do you mean? I know R80.20.50 is the lates with full Central Management support.

R81.10 is not yet fully supported for Central Management.

Is it right?

[Chris_Atkinson]

As above it should work from R80.20.30 onwards.

Is your issue configuring the IP on the appliance or in SmartConsole?