On 18/07/15 15:25, bri...@aracnet.com wrote:
the output of ip is a bit of a mess.

   valid_lft forever preferred_lft forever

what the hell ? i have no idea what tha means.  i know i'll do man ip, it's 
probably
got an explanation. no. it doesn't.

It's saying that the valid and preferred remaining LiFeTimes for that address assignment are "forever", probably because they have been statically assigned. Compare this to a DHCP-assigned address record, which might say something like:

    inet 192.168.0.2/24 brd 192.168.0.255 scope global dynamic eth0
       valid_lft 86291sec preferred_lft 86291sec

It would be entirely reasonable to file a bug against the man page ip-address(8) for not explaining the output more clearly. (That man page has some other issues anyway, like not having had its header and footer changed properly when it was clone-and-hacked from ip-route(8).)


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