a) you migrate in increments, so even if your migration needs to run old and new to compare, you don't need to do it for everything at once.
b) you probably have some slack, and you can make slack by packing tighter during migration.
c) you probably have some amount of regular hardware refresh. Retaining the old hardware a bit longer can get you more headroom for migration.
d) some servers can probably take an extended maintenance outage during conversion.
e) depending on everything, you might be able to get short term capacity from cloud or short term leases.
There's almost certainly some automation around migration. Some of it might even work.
Have a plan, make progress... even if you don't migrate everything by the date, you'll have done a lot and reduce the broadcom bill.
a) you migrate in increments, so even if your migration needs to run old and new to compare, you don't need to do it for everything at once.
b) you probably have some slack, and you can make slack by packing tighter during migration.
c) you probably have some amount of regular hardware refresh. Retaining the old hardware a bit longer can get you more headroom for migration.
d) some servers can probably take an extended maintenance outage during conversion.
e) depending on everything, you might be able to get short term capacity from cloud or short term leases.
There's almost certainly some automation around migration. Some of it might even work.
Have a plan, make progress... even if you don't migrate everything by the date, you'll have done a lot and reduce the broadcom bill.