Question about deprecating an address on OSX or BSD

guylhem

Newbie

Posts: 7

Question about deprecating an address on OSX or BSD

« on: July 20, 2011, 11:00:11 am »

Hello

I would like to know what is the equivalent on OSX or BSD of the following linux command :

ip -6 addr change 2001::something/64 dev tap0 preferred_lft 0

The idea is to make the address still valid for receiving packets, but not valid for sending them.

I tried to do some googling but I found nothing for OSX or BSD

Thanks
Guylhem


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juhoostman

Newbie

Posts: 11

Re: Question about deprecating an address on OSX or BSD

« Reply #1 on: July 22, 2011, 08:14:58 am »

Try this: ifconfig DEV inet6 ADDR deprecated

This is not tested at all, since I have no access to an OS X, instead it is quickly derived from the source. You may also have a different version of ifconfig.


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guylhem

Newbie

Posts: 7

Re: Question about deprecating an address on OSX or BSD

« Reply #2 on: July 22, 2011, 08:52:52 am »

Hello

Thanks - but with this syntax I get:

ifconfig: unable to get address cache: Operation not supported on socket

If I remove "addr" it works, but the address is not deprecated.

Guylhem


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jrocha

Network Engineer, Hurricane Electric
Administrator
Jr. Member

Posts: 66

Re: Question about deprecating an address on OSX or BSD

« Reply #3 on: July 22, 2011, 12:03:17 pm »

Replace DEV with your device name and ADDR with the address you wish to depreciate, like so:

sudo ifconfig en0 inet6 2001:470::a9:1889:a6e7:ee07:1687 deprecated


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juhoostman

Newbie

Posts: 11

Re: Question about deprecating an address on OSX or BSD

« Reply #4 on: July 26, 2011, 05:32:28 am »

If this doesn't work, there may be other means to do what you want. You can create a pseudo-interface and assign the addresses you don't want to be used by default to it instead of the real outgoing interface. You should assign only single addresses to the pseudo-interface, not subnets. If the addresses have subnets, add explicit routes to them through their real interfaces.


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juhoostman

Newbie

Posts: 11

Re: Question about deprecating an address on OSX or BSD

« Reply #5 on: July 26, 2011, 06:17:53 am »

You can also use ip6addrctl if it is available. First run ip6addrctl to see the current policy table, then add a new rule:

Code:

ip6addrctl add <prefix to be "deprecated"> 1 <label that is not yet used, maybe greater than 10>


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