Hans-Joachim Baader (hans-joachim.baa...@cjt.de) wrote on 27 May 2008 11:44: >I'm currently testing replacing ISC dhdpc with dnsmasq. On one of the test >machines I got an error "cannot send DHCP/BOOTP option 43: no space left >in packet". This message repeated endlessly and none of the clients could >get a lease. All other servers worked fine so far. The other servers have >identical configuration, but the clients may have a different PXE BIOS. > >What could be the cause of this? Following is the complete config file. >No command line options are used.
Your client uses bootp, sometimes there's very little space for options in the packet. You can try removing everything non-essential, such as net2 options when they're not used. You may have to build a config tuned for each machine. For example, a computer here uses dhcp when it boots windows, and there's no space shortage; in this case it also needs routing info. When it does remote booting it uses bootp, there's very little space, and it doesn't need routing. My dhcp-options file has more than 1000 lines... It's generated by a script. >================================== >pid-file=/var/run/dnsmasq/dnsmasq.pid >no-poll >dhcp-no-override >domain=domain.local > >dhcp-range=net1,172.16.73.1,172.16.73.254,1d >dhcp-range=net2,192.168.1.101,192.168.1.120,1d > >dhcp-option=46,1 # netbios node type >#dhcp-option=47 # empty netbios scope >dhcp-option=net1,option:router,172.16.11.254 >dhcp-option=net2,option:router,192.168.1.1 >dhcp-option=6,172.16.1.1 >dhcp-option=net1,1,255.255.0.0 >dhcp-option=net2,1,255.255.255.0 > >dhcp-option=43,09:0f:00:03:0c:4e:65:74:77:6f:72:6b:20:62:6f:6f:74:0a:05:00:4d >:45:4e:55:06:01:02:08:03:00:03:00:47:04:00:03:00:00:43:01:41:ff > >dhcp-boot=dummy.0,server043,172.16.1.53 >bootp-dynamic > >dhcp-lease-max=254 >#dhcp-leasefile=/var/lib/misc/dnsmasq.leases >dhcp-authoritative >================================== > >The network net2 is not used, there is no second network card in these >servers. >Option 43 is needed to boot some old PXE clients without a special PXE or >mtftp >server. Is there something wrong with the config file?
