cIpAddressPfxAdvPfdLifetime
1.3.6.1.4.1.9.10.86.1.1.1.1.8
The length of time in seconds that this prefix will
remain preferred, i.e. time until deprecation. A
value of 4,294,967,295 represents infinity.
The address generated from a deprecated prefix should no
longer be used as a source address in new communications,
but packets received on such an interface are processed
as expected.