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Does the ASA 5510 support /31 mask?

Network Operations
Level 1
Level 1

‎12-09-2013 04:39 PM - edited ‎02-21-2020 05:04 AM

Hi,

I've got an ASA 5510 8.2(1) and have to move to a /31 Internet address.  Is the ASA capable of it?

Thanks.

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2 Replies 2

daniel.dib
Level 7
Level 7

‎12-09-2013 11:39 PM

I don't believe it is supported:

https://supportforums.cisco.com/thread/2243858

Daniel Dib
CCIE #37149

Daniel Dib
CCIE #37149
CCDE #20160011

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Rolf Fischer
Level 9
Level 9
In response to daniel.dib

‎12-10-2013 06:35 AM

Hi,

/31 masks are generally supported only on Point-to-Point (non-multiaccess) WAN-Interfaces:

Using IP addresses with 31-Bit Prefixes on Point-to-Point WAN Interfaces to Limit Number of IP Addresses Required

HTH

Rolf

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