Ceph: [ERR] OSD_UNREACHABLE: nn osds(s) are not reachable

Issue

[ERR] OSD_UNREACHABLE: nn osds(s) are not reachable.

The system is in an Error state claiming the OSD Public IP Address are not within the range of the public_network Ceph Configuration Setting

Example:

# ceph -s
  cluster:
    id:     [Redacted]
    health: HEALTH_ERR
            8 osds(s) are not reachable

  services:
    mon: 3 daemons, quorum ceph1,ceph3,ceph2 (age 2h)
    mgr: ceph1.cuesmd(active, since 2h), standbys: ceph2.mkfrki, ceph3.kpzzuq
    mds: 1/1 daemons up, 2 standby
    osd: 32 osds: 32 up (since 6m), 32 in (since 3w)

  data:
    volumes: 1/1 healthy
    pools:   8 pools, 2498 pgs
    objects: 649.46M objects, 23 TiB
    usage:   72 TiB used, 21 TiB / 93 TiB avail
    pgs:     2498 active+clean

# ceph health detail 
HEALTH_ERR 8 osds(s) are not reachable
[ERR] OSD_UNREACHABLE: 8 osds(s) are not reachable
    osd.0's public address is not in '100.xx.191.136/29,100.xx.159.136/29' subnet
    osd.1's public address is not in '100.xx.191.136/29,100.xx.159.136/29' subnet
    osd.2's public address is not in '100.xx.191.136/29,100.xx.159.136/29' subnet
    osd.3's public address is not in '100.xx.191.136/29,100.xx.159.136/29' subnet
    osd.4's public address is not in '100.xx.191.136/29,100.xx.159.136/29' subnet
    osd.5's public address is not in '100.xx.191.136/29,100.xx.159.136/29' subnet
    osd.6's public address is not in '100.xx.191.136/29,100.xx.159.136/29' subnet
    osd.7's public address is not in '100.xx.191.136/29,100.xx.159.136/29' subnet