DHCP Lease-Time bei CGNAT

16:15:16.509058 82:62:a4:e2:85:c0 > 78:c5:7d:49:d2:98, ethertype IPv4 (0x0800), length 342: (tos 0x0, ttl 64, id 959, offset 0, flags [DF], proto UDP (17), length 328)
    10.143.196.88.68 > 10.143.196.89.67: [bad udp cksum 0x9f15 -> 0x5f44!] BOOTP/DHCP, Request from 82:62:a4:e2:85:c0, length 300, xid 0xc469a705, Flags [none] (0x0000)
          Client-IP 10.143.196.88
          Client-Ethernet-Address 82:62:a4:e2:85:c0
          Vendor-rfc1048 Extensions
            Magic Cookie 0x63825363
            DHCP-Message (53), length 1: Request
            MSZ (57), length 2: 576
            Parameter-Request (55), length 8:
              Subnet-Mask (1), Default-Gateway (3), Domain-Name-Server (6), Hostname (12)
              Domain-Name (15), BR (28), NTP (42), Classless-Static-Route (121)
            Hostname (12), length 4: "bpi4"
            Vendor-Class (60), length 12: "udhcp 1.36.1"
16:15:16.562334 78:c5:7d:49:d2:98 > 82:62:a4:e2:85:c0, ethertype IPv4 (0x0800), length 360: (tos 0xc0, ttl 64, id 48450, offset 0, flags [none], proto UDP (17), length 346)
    10.143.196.89.67 > 10.143.196.88.68: [udp sum ok] BOOTP/DHCP, Reply, length 318, xid 0xc469a705, Flags [none] (0x0000)
          Client-IP 10.143.196.88
          Your-IP 10.143.196.88
          Server-IP 10.143.196.89
          Client-Ethernet-Address 82:62:a4:e2:85:c0
          Vendor-rfc1048 Extensions
            Magic Cookie 0x63825363
            DHCP-Message (53), length 1: ACK
            Server-ID (54), length 4: 10.143.196.89
            Lease-Time (51), length 4: 120
            RN (58), length 4: 54
            RB (59), length 4: 99
            Subnet-Mask (1), length 4: 255.255.255.240
            BR (28), length 4: 10.143.196.95
            Domain-Name (15), length 14: "home"
            Hostname (12), length 4: "bpi4"
            Domain-Name-Server (6), length 8: 10.74.210.210,10.74.210.211
            Default-Gateway (3), length 4: 10.143.196.89