S50 does not accept specific ip address with dhcp option 161

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    • Newbie

    Start situation:
    Old ftp server on Windows 2000 with wrongly chosen non-private address
    New ftp server on 2008R2 with address
    S50 thin clients, old and newest firmware; thinos
    Cisco router with dhcp option 161 (as ip)

    When I manually choose the new ftp server in the thin client, I get the right config, but when the DHCP server gives the new address, it’s not accepted by the thin client and somehow translated to

    I have checked the DHCP offer with Wireshark and offer is ok:
    Option: (t=161,l=4) Unassigned; Length: 4
    Value: ac:d8:01:05 (= [current value]
    Value: 0a:22:00:1b (= [new value]

    Next network package is wrong, 34 becomes 0.
    28199 3900.093480 TCP 74 4711 > ftp [SYN] Seq=0 Win=5840 Len=0 MSS=1460 SACK_PERM=1 TSval=4294938822 TSecr=0 WS=4

    what I have tried:
    different firmware versions
    other FTP server on laptop with different ip addresses

    Problem remains: no ip address in subnet is accepted by the thin client. and works fine; only addresses in the required range don’t.

    any ideas?

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