Issued:
2011-05-19
Updated:
2011-05-19

RHBA-2011:0697 - dhcp bug fix and enhancement update

Synopsis

dhcp bug fix and enhancement update

Type/Severity

Bug Fix Advisory

Topic

Updated dhcp packages that fix several bugs and add various enhancements are now available for Red Hat Enterprise Linux 6.

Description

The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. DHCPv6 is the DHCP protocol version for IPv6 networks.

This update fixes the following bugs:

  • Previously, it was impossible to configure the dhcrelay service to run the dhcrelay daemon with additional arguments. With this update, a DHCRELAYARGS variable is available for the /etc/sysconfig/dhcrelay configuration file, which allows additional arguments to be passed to the dhcrelay daemon properly. (BZ#625846)

  • Previously, the dhclient utility did not log its PID (process identifier) in syslog entries, making troubleshooting in systems with multiple running dhclients difficult. Now, the dhclient utility logs its PID properly. (BZ#627257)

  • Previously, the dhclient utility sometimes parsed date strings in lease files incorrectly, resulting in syntax error messages in its output. This bug has been fixed and the dates in the lease files are now parsed with no error messages given. (BZ#631071)

  • When the dhclient utility was updating a "search" entry in the /etc/resolv.conf file, it sometimes did not add a missing domain part. This was inconsistent with NetworkManager behavior. Now, while updating the "search" entry, the dhclient utility always adds the domain part of the host name given to the client if it is missing. (BZ#637763)

  • Previously, the dhcpd service with IPv6 support sometimes created a lease file that it was unable to parse. Consequently, once the service was restarted, it went into a loop and could not start. This bug has been fixed and now the service is able to properly parse all lease files it generates. (BZ#672551)

  • DHCP servers at some ISPs send to clients the "interface-mtu" option with the value of 576. Such a low MTU (Maximum Transmission Unit) can cause throughput problems with UDP traffic, among other things. With this update, the dhclient utility now sets the interface MTU only if the value obtained from the server is higher than 576. (BZ#681721)

  • Previously, the dhclient package was missing its LICENSE file. With this update, the file has been added. (BZ#613683)

This update adds the following enhancements:

  • The dhcp package now provides an implementation of Classless Static Route Options for DHCPv4 (RFC 3442). It can supply network route configuration to a large number of hosts without individual configuration of each one. (BZ#558641)

  • The dhcp package now provides support for IPoIB (IP over InfiniBand) interfaces. (BZ#660681)

Users of dhcp are advised to upgrade to these updated packages, which fix these bugs and add these enhancements.

Solution

Before applying this update, make sure that all previously-released errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Scientific Computing6x86_64
Red Hat Enterprise Linux for Power, big endian6ppc64
Red Hat Enterprise Linux for IBM z Systems6s390x
Red Hat Enterprise Linux Workstation6x86_64
Red Hat Enterprise Linux Workstation6i386
Red Hat Enterprise Linux Server6x86_64
Red Hat Enterprise Linux Server6i386
Red Hat Enterprise Linux Server from RHUI6x86_64
Red Hat Enterprise Linux Server from RHUI6i386
Red Hat Enterprise Linux Server - Retired Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems)6s390x
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems)6s390x
Red Hat Enterprise Linux Desktop6x86_64
Red Hat Enterprise Linux Desktop6i386

Updated Packages

  • dhcp-devel-4.1.1-19.P1.el6.ppc.rpm
  • dhcp-debuginfo-4.1.1-19.P1.el6.ppc.rpm
  • dhclient-4.1.1-19.P1.el6.i686.rpm
  • dhcp-devel-4.1.1-19.P1.el6.ppc64.rpm
  • dhcp-4.1.1-19.P1.el6.i686.rpm
  • dhcp-devel-4.1.1-19.P1.el6.x86_64.rpm
  • dhclient-4.1.1-19.P1.el6.x86_64.rpm
  • dhcp-debuginfo-4.1.1-19.P1.el6.s390x.rpm
  • dhclient-4.1.1-19.P1.el6.s390x.rpm
  • dhcp-debuginfo-4.1.1-19.P1.el6.ppc64.rpm
  • dhcp-debuginfo-4.1.1-19.P1.el6.s390.rpm
  • dhcp-4.1.1-19.P1.el6.src.rpm
  • dhcp-4.1.1-19.P1.el6.ppc64.rpm
  • dhcp-devel-4.1.1-19.P1.el6.s390x.rpm
  • dhcp-devel-4.1.1-19.P1.el6.i686.rpm
  • dhcp-devel-4.1.1-19.P1.el6.s390.rpm
  • dhcp-debuginfo-4.1.1-19.P1.el6.x86_64.rpm
  • dhclient-4.1.1-19.P1.el6.ppc64.rpm
  • dhcp-4.1.1-19.P1.el6.s390x.rpm
  • dhcp-debuginfo-4.1.1-19.P1.el6.i686.rpm
  • dhcp-4.1.1-19.P1.el6.x86_64.rpm

Fixes

CVEs

(none)

References

(none)

Additional information