For some reason, tftpboot does not work with a colon in filename parameter:group {  filename node7:linux/pxelinux.0;  host machine_7a  {    hardware ethernet 02:01:02:02:01:11;    fixed-address 192.168.10.8;  }  host machine_7b {    hardware ethernet 02:01:02:02:01:12;    fixed-address 192.168.10.9;  }}If I change the colon to a dash -, the remote machines can tftpboot fine. Do you know why a colon in the filename parameter doesn't work?UPDATE:Output from /var/log/message when I set the filename to node7-linux/pxelinux.0Jan 22 22:52:48 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:11 via br0Jan 22 22:52:48 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 22:52:49 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:11 via br0Jan 22 22:52:49 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 22:52:51 linux-yp1y dhcpd: DHCPREQUEST for 192.168.10.7 (192.168.10.1) from 02:01:02:02:01:11 via br0Jan 22 22:52:51 linux-yp1y dhcpd: DHCPACK on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 22:52:51 linux-yp1y atftpd[12967]: Serving node7-linux/pxelinux.0 to 192.168.10.7:1024Jan 22 22:52:51 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:11 via br0Jan 22 22:52:51 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 22:52:52 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:11 via br0Jan 22 22:52:52 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 22:52:54 linux-yp1y dhcpd: DHCPREQUEST for 192.168.10.7 (192.168.10.1) from 02:01:02:02:01:11 via br0Jan 22 22:52:54 linux-yp1y dhcpd: DHCPACK on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 22:52:54 linux-yp1y atftpd[12967]: Serving node7-linux/pxelinux.cfg/default to 192.168.10.7:1024Jan 22 22:52:54 linux-yp1y atftpd[12967]: Serving node7-linux/vmlinuz to 192.168.10.7:1025Jan 22 22:52:55 linux-yp1y atftpd[12967]: Serving node7-linux/initrd to 192.168.10.7:1026Jan 22 22:53:14 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:11 via br0Jan 22 22:53:14 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 22:53:14 linux-yp1y dhcpd: DHCPREQUEST for 192.168.10.7 (192.168.10.1) from 02:01:02:02:01:11 via br0Jan 22 22:53:14 linux-yp1y dhcpd: DHCPACK on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 22:53:15 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:12 via br0Jan 22 22:53:15 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.8 to 02:01:02:02:01:12 via br0Jan 22 22:53:15 linux-yp1y dhcpd: DHCPREQUEST for 192.168.10.8 (192.168.10.1) from 02:01:02:02:01:12 via br0Jan 22 22:53:15 linux-yp1y dhcpd: DHCPACK on 192.168.10.8 to 02:01:02:02:01:12 via br0Output from /var/log/message when I set the filename to node7:linux/pxelinux.0:Jan 22 23:16:57 linux-yp1y kernel: [343021.700191] br0: port 6(vnet6) entering forwarding stateJan 22 23:16:57 linux-yp1y kernel: [343021.700296] device vnet6 left promiscuous modeJan 22 23:16:57 linux-yp1y kernel: [343021.700302] br0: port 6(vnet6) entering disabled stateJan 22 23:16:57 linux-yp1y kernel: [343021.721423] br0: port 7(vnet7) entering forwarding stateJan 22 23:16:57 linux-yp1y kernel: [343021.721467] device vnet7 left promiscuous modeJan 22 23:16:57 linux-yp1y kernel: [343021.721470] br0: port 7(vnet7) entering disabled stateJan 22 23:16:58 linux-yp1y kernel: [343021.742969] br2: port 4(vnet8) entering forwarding stateJan 22 23:16:58 linux-yp1y kernel: [343021.743040] device vnet8 left promiscuous modeJan 22 23:16:58 linux-yp1y kernel: [343021.743042] br2: port 4(vnet8) entering disabled stateJan 22 23:16:58 linux-yp1y ifdown:     vnet6     Jan 22 23:16:58 linux-yp1y ifdown: Interface not available and no configuration found.Jan 22 23:16:58 linux-yp1y ifdown:     vnet7     Jan 22 23:16:58 linux-yp1y ifdown: Interface not available and no configuration found.Jan 22 23:16:58 linux-yp1y ifdown:     vnet8     Jan 22 23:16:58 linux-yp1y ifdown: Interface not available and no configuration found.Jan 22 23:17:01 linux-yp1y kernel: [343025.377050] device vnet6 entered promiscuous modeJan 22 23:17:01 linux-yp1y kernel: [343025.393810] br0: port 6(vnet6) entering forwarding stateJan 22 23:17:01 linux-yp1y kernel: [343025.393814] br0: port 6(vnet6) entering forwarding stateJan 22 23:17:01 linux-yp1y kernel: [343025.449562] device vnet7 entered promiscuous modeJan 22 23:17:01 linux-yp1y kernel: [343025.466276] br0: port 7(vnet7) entering forwarding stateJan 22 23:17:01 linux-yp1y kernel: [343025.466280] br0: port 7(vnet7) entering forwarding stateJan 22 23:17:01 linux-yp1y kernel: [343025.557549] device vnet8 entered promiscuous modeJan 22 23:17:01 linux-yp1y kernel: [343025.574265] br2: port 4(vnet8) entering forwarding stateJan 22 23:17:01 linux-yp1y kernel: [343025.574270] br2: port 4(vnet8) entering forwarding stateJan 22 23:17:03 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:11 via br0Jan 22 23:17:03 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 23:17:04 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:11 via br0Jan 22 23:17:04 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 23:17:05 linux-yp1y kernel: [343029.580829] br2: port 4(vnet8) entering forwarding stateJan 22 23:17:06 linux-yp1y dhcpd: DHCPREQUEST for 192.168.10.7 (192.168.10.1) from 02:01:02:02:01:11 via br0Jan 22 23:17:06 linux-yp1y dhcpd: DHCPACK on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 23:17:06 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:12 via br0Jan 22 23:17:06 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.8 to 02:01:02:02:01:12 via br0Jan 22 23:17:07 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:12 via br0Jan 22 23:17:07 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.8 to 02:01:02:02:01:12 via br0Jan 22 23:17:09 linux-yp1y dhcpd: DHCPREQUEST for 192.168.10.8 (192.168.10.1) from 02:01:02:02:01:12 via br0Jan 22 23:17:09 linux-yp1y dhcpd: DHCPACK on 192.168.10.8 to 02:01:02:02:01:12 via br0Jan 22 23:17:12 linux-yp1y kernel: [343035.804008] vnet8: no IPv6 routers presentJan 22 23:17:12 linux-yp1y kernel: [343036.148005] vnet7: no IPv6 routers presentJan 22 23:17:12 linux-yp1y kernel: [343036.397004] vnet6: no IPv6 routers presentJan 22 23:17:24 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:11 via br0Jan 22 23:17:24 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 23:17:25 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:11 via br0Jan 22 23:17:25 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 23:17:27 linux-yp1y dhcpd: DHCPREQUEST for 192.168.10.7 (192.168.10.1) from 02:01:02:02:01:11 via br0Jan 22 23:17:27 linux-yp1y dhcpd: DHCPACK on 192.168.10.7 to 02:01:02:02:01:11 via br0Jan 22 23:17:27 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:12 via br0Jan 22 23:17:27 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.8 to 02:01:02:02:01:12 via br0Jan 22 23:17:28 linux-yp1y dhcpd: DHCPDISCOVER from 02:01:02:02:01:12 via br0Jan 22 23:17:28 linux-yp1y dhcpd: DHCPOFFER on 192.168.10.8 to 02:01:02:02:01:12 via br0Jan 22 23:17:30 linux-yp1y dhcpd: DHCPREQUEST for 192.168.10.8 (192.168.10.1) from 02:01:02:02:01:12 via br0Jan 22 23:17:30 linux-yp1y dhcpd: DHCPACK on 192.168.10.8 to 02:01:02:02:01:12 via br0
dhcpd does not allow filename option with a colon in it
filenames;dhcp;pxe;tftp