Bizarre long name of pi visible on Lan - Raspberry Pi Forums

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the rest of lan seeing bizarre long name pi, is
dhcpcd-671linux-4935-v7armv7lbcm2835.site01.cecilward.com

, not based on raspberry-pi-1.* set host name using raspi-config. can't ping "raspberry-pi-1." or "raspberrypi.site01.cecilward.com." (the expected site01.cecilward.com being domain name part suffixed onto every other machine's name) lan scanning app says 'hostname' hugely long, , dhcp name expected, whatever means.

that funky name result of reverse dns lookup. give ip address dns, returns domain name.

dig -x 192.168.3.14

code: select all

pi@viking ~ $ dig -x 192.168.3.14  ; <<>> dig 9.10.3-p4-raspbian <<>> -x 192.168.3.14 ;; global options: +cmd ;; got answer: ;; ->>header<<- opcode: query, status: noerror, id: 10129 ;; flags: qr aa rd ra; query: 1, answer: 1, authority: 1, additional: 1  ;; opt pseudosection: ; edns: version: 0, flags:; udp: 4096 ;; question section: ;14.3.168.192.in-addr.arpa.                in      ptr  ;; answer section: 14.3.168.192.in-addr.arpa. 259200  in      ptr     dhcp-192-168-3-14.example.co.uk.  ;; authority section: 3.168.192.in-addr.arpa.    259200  in      ns      example.co.uk.  ;; query time: 4 msec ;; server: 2001:???:????:???::1#53(2001:???:????:???::1) ;; when: tue sep 12 07:00:58 utc 2017 ;; msg size  rcvd: 114
normal dns lookup works domain name , returns ip addr

code: select all

pi@viking ~ $ dig dhcp-192-168-3-14.example.co.uk.  ; <<>> dig 9.10.3-p4-raspbian <<>> dhcp-192-168-3-14.example.co.uk. ;; global options: +cmd ;; got answer: ;; ->>header<<- opcode: query, status: noerror, id: 63934 ;; flags: qr aa rd ra; query: 1, answer: 1, authority: 1, additional: 4  ;; opt pseudosection: ; edns: version: 0, flags:; udp: 4096 ;; question section: ;dhcp-192-168-3-14.example.co.uk. in         ;; answer section: dhcp-192-168-3-14.example.co.uk. 259200 in 192.168.3.14  ;; authority section: example.co.uk.   259200  in      ns      ns.example.co.uk.  ;; additional section: ns.example.co.uk. 259200 in            192.168.3.11 ns.example.co.uk. 259200 in      aaaa    2001:???:????:???::1 ns.example.co.uk. 259200 in      aaaa    2001:???:????:???:ba27:ebff:fe85:c936  ;; query time: 3 msec ;; server: 2001:???:????:???::1#53(2001:???:????:???::1) ;; when: tue sep 12 07:04:24 utc 2017 ;; msg size  rcvd: 169


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