Why does DHCPD+BIND set TTL 60 (1 minute) for a record?

Question

Domain Name System

Greetings!
I set up a bunch of BIND + DHCPD
configured, dns update is normal,
BUT records are deleted and added every 1-2 minutes.
those. added, lives for a minute, left, a minute later only added again.
For some reason, dhcpd sets TTL 60 zones for dns (see at the very end of the post), how can I fix this?
I've already broken my head about mana.
Configs:
DHCPD:

server-identifier 192.168.0.1;
ddns-updates on;
ddns-update-style interim;
ddns-domainname "suv.";
ddns-ttl 38400;
ddns-rev-domainname "in-addr.arpa.";
ignore client-updates;

include "/etc/dhcp/rndc.key";

zone 0.168.192.in-addr.arpa. {
       primary 192.168.0.1;
       key "rndc-key";
}
zone suv. {
       primary 192.168.0.1;
       key "rndc-key";
}

option domain-name "suv";
option domain-name-servers 192.168.0.1;
default-lease-time              600;
max-lease-time                  7200;
log-facility			local7;
allow booting;
allow bootp;

authoritative;
log-facility local7;


subnet 192.168.0.0 netmask 255.255.255.0 {
  authoritative;
  range 192.168.0.10 192.168.0.254;
  option broadcast-address 192.168.0.255;
  option routers 192.168.0.1;
  allow unknown-clients;
}

BIND:
named.conf.options

options {
  directory "/var/cache/bind";

  dnssec-enable no;
  dnssec-validation no;
  auth-nxdomain no;    # conform to RFC1035
  listen-on-v6 { any; };
  listen-on {
    192.168.0.1;
    127.0.0.1;
  };
  forwarders {			
    8.8.8.8;
    8.8.4.4;		
  };
    #recursion yes;
    #allow-recursion { localhost; };
    #allow-query { localhost; 192.168.0.0/16; };
    #allow-transfer { localhost; 192.168.0.0/16; };
};

controls {
        inet 127.0.0.1 allow {localhost; } keys { "rndc-key"; };
};

named.conf.local

include "/etc/bind/rndc.key";

zone "suv" {
  type master;
  check-names ignore;
  file "/var/lib/bind/suvenirus.org.hosts";
  allow-update { key rndc-key; };
  notify yes;
  };

zone "0.168.192.in-addr.arpa" IN {
  type master;
  check-names ignore;
  allow-update { key rndc-key; };
    notify yes;
  file "/var/lib/bind/192.168.1.rev";
  };

Zones:

ORIGIN .
$TTL 38400	; 10 hours 40 minutes
suv			IN SOA	MainServer. 2me\.pavelk.gmail.com. (
        1447019263 ; serial
        10800      ; refresh (3 hours)
        3600       ; retry (1 hour)
        604800     ; expire (1 week)
        38400      ; minimum (10 hours 40 minutes)
        )
      NS	MainServer.
$ORIGIN suv.
$TTL 60	; 1 minute
laser1PC		A	192.168.0.15
      TXT	"003e9ba9fd2ca442e8f8f24ec486fb161b"
........  и так далее

Answer 1

So if the zone settings indicate that the records live 60 seconds. so what's the question? Increase the ttl of the default entry and then.