topic Re: 5540 Management Interface IP addressing issue in Network Security

5540 Management Interface IP addressing issue

FLOYD SALAZAR — Mon, 11 Mar 2019 20:31:43 GMT

How does one allow /31 mask for an management interface on an ASA5540 using version 8.3(1)?

I need to configure a 192.168.x.y /31 on the management 0/0 interface of a ASA5540 and it is providing me with the following error:

ERROR: /31 mask is not allowed

Does anyone know why and how to get around issue?

Re: 5540 Management Interface IP addressing issue

Maykol Rojas — Wed, 11 May 2011 00:45:03 GMT

Floyd,

I hope you are doing great. Mask 31 will only give you 1 Available IP address. You wont be able to do connections to this IP address for management, Since any other IP will be out of range. That is why it is giving you the error, at least, you should have a range of 2 available IPs in order to establish a connection to the firewall.

I hope this makes sense.

Mike