multi-cache descrived better

This commit is contained in:
Randy Bush 2023-03-22 15:33:25 -07:00
parent 941f2b1dd3
commit ac2c675d32

View file

@ -248,13 +248,11 @@
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A VRP is effective if it is in the fetched set from any of the
currently preferred caches. Therefore, if the router is
fetching from multiple equal preference caches, then withdraws
of a particular VRP invalidating some prefix may take effect
comparitively later than announcements of that VRP. All in-use
caches must have withdrawn the VRP for the router to not have a
copy; but if the router has received an announcement from any
cache then that VRP is in effect.
currently preferred caches. Therefore, a VRP takes effect on
the router when the first cache serves that VRP, and the VRP is
in effect until the last cache withdraws that VRP. Thus, in a
global sense, the effect of a VRP announcement propagates more
quickly than a withdraw,
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Periodically, the router sends a Serial Query to the cache the