In order to conserve the limited bandwidth available, ISO images are not downloadable from mirror.centos.org
The following mirrors should have the ISO images available:
http://mirrors.tummy.com/mirrors/CentOS/8.2.2004/isos/ppc64le/
http://repos.hou.layerhost.com/centos/8.2.2004/isos/ppc64le/
http://mirror.sjc02.svwh.net/centos/8.2.2004/isos/ppc64le/
http://mirrors.umflint.edu/CentOS/8.2.2004/isos/ppc64le/
http://repos-va.psychz.net/centos/8.2.2004/isos/ppc64le/
http://mirrors.cmich.edu/centos/8.2.2004/isos/ppc64le/
http://mirrors.seas.harvard.edu/centos/8.2.2004/isos/ppc64le/
http://mirror.ancl.hawaii.edu/linux/centos/8.2.2004/isos/ppc64le/
http://ftp.ussg.iu.edu/linux/centos/8.2.2004/isos/ppc64le/
http://mirror.teklinks.com/centos/8.2.2004/isos/ppc64le/
http://mirror.grid.uchicago.edu/pub/linux/centos/8.2.2004/isos/ppc64le/
http://bay.uchicago.edu/centos/8.2.2004/isos/ppc64le/
http://centos.s.uw.edu/centos/8.2.2004/isos/ppc64le/
http://mirror.centos.lax1.serverforge.org/8.2.2004/isos/ppc64le/
http://mirror.keystealth.org/centos/8.2.2004/isos/ppc64le/
http://centos.mirrors.tds.net/pub/linux/centos/8.2.2004/isos/ppc64le/
http://centos.den.host-engine.com/8.2.2004/isos/ppc64le/
http://mirror.rackspace.com/CentOS/8.2.2004/isos/ppc64le/
http://mirrors.oit.uci.edu/centos/8.2.2004/isos/ppc64le/
http://mirrors.lug.mtu.edu/centos/8.2.2004/isos/ppc64le/
http://mirror.mojohost.com/centos/8.2.2004/isos/ppc64le/
http://mirror.phx1.us.spryservers.net/centos/8.2.2004/isos/ppc64le/
http://ftpmirror.your.org/pub/centos/8.2.2004/isos/ppc64le/
http://repo1.dal.innoscale.net/centos/8.2.2004/isos/ppc64le/
http://nyc.mirrors.clouvider.net/CentOS/8.2.2004/isos/ppc64le/
http://repos.forethought.net/centos/8.2.2004/isos/ppc64le/
http://repos-tx.psychz.net/centos/8.2.2004/isos/ppc64le/
http://ftp.osuosl.org/pub/centos/8.2.2004/isos/ppc64le/
http://mirror.datto.com/CentOS/8.2.2004/isos/ppc64le/
http://mirror.sfo12.us.leaseweb.net/centos/8.2.2004/isos/ppc64le/
+ others, see the full list of mirrors: https://www.centos.org/download/mirrors/
Mirrors verified Sat Dec 5 09:21:17 2020 UTC
You can also download the ISO images using bittorrent, a peer-to-peer file sharing protocol. The .torrent files can be found from CentOS mirrors. Various bittorrent clients are available, including (in no particular order of preference): utorrent, vuze (Azureus), BitTorrent, Deluge, ctorrent, ktorrent, rtorrent and transmission. Packaged copies of various torrent clients for CentOS can be found in the repositories listed in the following wiki article: https://wiki.centos.org/AdditionalResources/Repositories
The following mirrors should have the ISO images available:
http://mirrors.tummy.com/mirrors/CentOS/8.2.2004/isos/ppc64le/
http://repos.hou.layerhost.com/centos/8.2.2004/isos/ppc64le/
http://mirror.sjc02.svwh.net/centos/8.2.2004/isos/ppc64le/
http://mirrors.umflint.edu/CentOS/8.2.2004/isos/ppc64le/
http://repos-va.psychz.net/centos/8.2.2004/isos/ppc64le/
http://mirrors.cmich.edu/centos/8.2.2004/isos/ppc64le/
http://mirrors.seas.harvard.edu/centos/8.2.2004/isos/ppc64le/
http://mirror.ancl.hawaii.edu/linux/centos/8.2.2004/isos/ppc64le/
http://ftp.ussg.iu.edu/linux/centos/8.2.2004/isos/ppc64le/
http://mirror.teklinks.com/centos/8.2.2004/isos/ppc64le/
http://mirror.grid.uchicago.edu/pub/linux/centos/8.2.2004/isos/ppc64le/
http://bay.uchicago.edu/centos/8.2.2004/isos/ppc64le/
http://centos.s.uw.edu/centos/8.2.2004/isos/ppc64le/
http://mirror.centos.lax1.serverforge.org/8.2.2004/isos/ppc64le/
http://mirror.keystealth.org/centos/8.2.2004/isos/ppc64le/
http://centos.mirrors.tds.net/pub/linux/centos/8.2.2004/isos/ppc64le/
http://centos.den.host-engine.com/8.2.2004/isos/ppc64le/
http://mirror.rackspace.com/CentOS/8.2.2004/isos/ppc64le/
http://mirrors.oit.uci.edu/centos/8.2.2004/isos/ppc64le/
http://mirrors.lug.mtu.edu/centos/8.2.2004/isos/ppc64le/
http://mirror.mojohost.com/centos/8.2.2004/isos/ppc64le/
http://mirror.phx1.us.spryservers.net/centos/8.2.2004/isos/ppc64le/
http://ftpmirror.your.org/pub/centos/8.2.2004/isos/ppc64le/
http://repo1.dal.innoscale.net/centos/8.2.2004/isos/ppc64le/
http://nyc.mirrors.clouvider.net/CentOS/8.2.2004/isos/ppc64le/
http://repos.forethought.net/centos/8.2.2004/isos/ppc64le/
http://repos-tx.psychz.net/centos/8.2.2004/isos/ppc64le/
http://ftp.osuosl.org/pub/centos/8.2.2004/isos/ppc64le/
http://mirror.datto.com/CentOS/8.2.2004/isos/ppc64le/
http://mirror.sfo12.us.leaseweb.net/centos/8.2.2004/isos/ppc64le/
+ others, see the full list of mirrors: https://www.centos.org/download/mirrors/
Mirrors verified Sat Dec 5 09:21:17 2020 UTC
You can also download the ISO images using bittorrent, a peer-to-peer file sharing protocol. The .torrent files can be found from CentOS mirrors. Various bittorrent clients are available, including (in no particular order of preference): utorrent, vuze (Azureus), BitTorrent, Deluge, ctorrent, ktorrent, rtorrent and transmission. Packaged copies of various torrent clients for CentOS can be found in the repositories listed in the following wiki article: https://wiki.centos.org/AdditionalResources/Repositories