** Description changed:
- /sbin/dhclient-script in precise's isc-dhcp-client 4.1.ESV-R4-0ubuntu5.8
- contains the following snippet:
+ [Impact]
+ isc-dhcp-client in precise does not do stateless DHCPv6 correctly if it's
enabled as "dhcp 1" within "iface <IFACE> inet6 auto" within
/etc/network/interfaces. The dhclient-script responsible for updating
/etc/resolv.conf exists if it doesn't find an IPv6 address in its environment,
which is only true for stateful DHCPv6.
- BOUND6|RENEW6|REBIND6)
- if [ -z "${new_ip6_address}" ] || [ -z "${new_ip6_prefixlen}" ]; then
- exit_with_hooks 2
- fi
+ [Test Case]
+ * You should have IPv6 on your network segment, make a note of the subnet.
+ * Have a stateless DHCPv6 server listen on the network segment:
+ ** Minimal dhcpd6.conf:
+ authoritative;
+ option dhcp6.name-servers 2001:4860:4860::8888, 2001:4860:4860::8844;
+ option dhcp6.domain-search "ubuntu.com";
+ subnet6 fd7a:4ac2:1751:0::/64 {};
+ ** Adjust the subnet information to the one you're actually using or the DHCP
server will refuse to start.
+ ** Install isc-dhcp-server on a host on the same network segment.
+ ** Start up the server there using: /usr/sbin/dhcpd -cf dhcpd.conf -6 -lf
/tmp/leases.test
+ * Have network configuration be managed by ifupdown, not network-manager:
+ * Add the following configuration to /etc/network/interfaces:
+ iface eth0 inet6 auto
+ dhcp 1
+ * ifdown eth0
+ * ifup eth0
+ * Check if /etc/resolv.conf contains:
+ search ubuntu.com
+ nameserver 2001:4860:4860::8888
+ nameserver 2001:4860:4860::8844
- # set leased IP
- ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
- dev ${interface} scope global
+ [Regression Potential]
+ The suggested change is already present since quantal. The change itself is
self-contained
+
+ [Additional Info]
+ /sbin/dhclient-script in precise's isc-dhcp-client 4.1.ESV-R4-0ubuntu5.8
contains the following snippet:
+
+ BOUND6|RENEW6|REBIND6)
+ if [ -z "${new_ip6_address}" ] || [ -z "${new_ip6_prefixlen}" ]; then
+ exit_with_hooks 2
+ fi
+
+ # set leased IP
+ ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
+ dev ${interface} scope global
This assumes that the result of the DHCPv6 transaction is an address
with a prefix, which is the case for stateful DHCPv6. For stateless
DHCPv6, however, we only get additional information that's not directly
- address-related. This is fixed in saucy and reads like this:
+ address-related. This is fixed since quantal and reads like this:
- BOUND6|RENEW6|REBIND6)
- if [ "${new_ip6_address}" ] && [ "${new_ip6_prefixlen}" ]; then
- # set leased IP
- ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
- dev ${interface} scope global
- fi
+ BOUND6|RENEW6|REBIND6)
+ if [ "${new_ip6_address}" ] && [ "${new_ip6_prefixlen}" ]; then
+ # set leased IP
+ ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
+ dev ${interface} scope global
+ fi
It looks like the only change from the diff to the current saucy version
we need for it to work correctly.
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https://bugs.launchpad.net/bugs/1214385
Title:
Stateless DHCPv6 not working in precise
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