193.in-addr.arpa procedures V1.3

 bonito at nis.garr.it (Antonio_Blasco Bonito) writes:
 * > 
 * > 
 * > Folks,
 * > 
 * > One last go. I think we folded in most of the comments from Blaso and othe
 * rs.
 * > We have included the procedures for single class C reverse zones, not via
 * > block zones.
 * > 
 * > We are already doing our first trials with block delegations, all seems to
 * > work fine. Please let's get this document accepted and delegate these bloc
 * ks.
 * 
 * Sorry for this late comment, but it has come now to my mind:
 * I think it would be wise to include recommended values for SOA fields
 * (refresh, retry, etc). This could save problems to ns.ripe.net
 * when acting as secondary.

What do you think recommended values are ? I know have for everything in
193.in-addr.arpa:

@               IN      SOA     ns.ripe.net.      hostmaster.ripe.net.
                        (
                                   1.20  ; Serial
                                 14400  ; Refresh 4 hours
                                  3600  ; Retry   1 hours
                                604800  ; Expire  7 days
                                518400  ; TTL     6 days
                        )

which in my view is reasonable, since these things (just delegations) do not
change too often. For the actual class C zones, we have for
45.87.192.in-addr.arpa (RIPE NCC net):

@               IN      SOA     ns.ripe.net.      hostmaster.ripe.net.
                        (
                                   1.4  ; Serial
                                 28800  ; Refresh 8 hours
                                  7200  ; Retry   2 hours
                                604800  ; Expire  7 days
                                 86400  ; Minimum 1 day
                        )

Are these fine to be recommended ?

-Marten