Bug 37149 – dhcpd fails to start: subnet & netmask != network

Bug 37149 - dhcpd fails to start: subnet & netmask != network


Summary:	dhcpd fails to start: subnet & netmask != network

Status:	RESOLVED DUPLICATE of bug 44135

Product:	UCS
Classification:	Unclassified
Component:	DHCP
Version:	UCS 4.1
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	UCS 4.0-x
Assigned To:	UCS maintainers
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Reported:	2014-12-02 15:35 CET by Philipp Hahn
Modified:	2018-04-13 13:40 CEST (History)
CC List:	2 users (show)

See Also:	32995
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Description Philipp Hahn

2014-12-02 15:35:09 CET

I accidentally created a subnet 10.200.36.0/16, where

# ipcalc 10.200.36.0/16
Address:   10.200.36.0          00001010.11001000. 00100100.00000000
Netmask:   255.255.0.0 = 16     11111111.11111111. 00000000.00000000
Wildcard:  0.0.255.255          00000000.00000000. 11111111.11111111
=>
Network:   10.200.0.0/16        00001010.11001000. 00000000.00000000
HostMin:   10.200.0.1           00001010.11001000. 00000000.00000001
HostMax:   10.200.255.254       00001010.11001000. 11111111.11111110
Broadcast: 10.200.255.255       00001010.11001000. 11111111.11111111
Hosts/Net: 65534                 Class A, Private Internet

dhcpd fails to start:
# tail /var/log/daemon.log
Dec  2 15:25:18 test35 dhcpd: subnet 10.200.36.0 netmask 255.255.0.0 
Dec  2 15:25:18 test35 dhcpd:                                      ^
Dec  2 15:25:18 test35 dhcpd: LDAP: cannot parse dhcpService entry 'cn=phahn.qa,cn=dhcp,dc=phahn,dc=qa'
Dec  2 15:25:18 test35 dhcpd: Configuration file errors encountered -- exiting

This happens because of subnet & netasmk != subnet.
Changing /16 to /24 allows the server to start again.

UMC should detect this mis-configuration and prevent generating such an invalid configuration.

Comment 1 Florian Best

2014-12-02 15:45:37 CET

(In reply to Philipp Hahn from comment #0)
> UMC should detect this mis-configuration and prevent generating such an
> invalid configuration.
yes! we should also fix Bug #32995.

Comment 2 Philipp Hahn

2017-04-07 12:39:33 CEST


*** This bug has been marked as a duplicate of bug 44135 ***