Package: ifupdown Version: 0.7.8 Severity: important Tags: ipv6 Adding an entry to the routing table immediately after an inet6 interface is brought up will result in an error. However waiting for 5 seconds after the interface has been brought up and then changing the routing table succeeds.
More specifically, when running the following command: /sbin/ip -6 route add $GW src $IP dev eth0 table 1 where $GW is the gateway IP and $IP is the IP associated with eth0. IP will exit with code 2 and print the following: RTNETLINK answers: Invalid argument and the routing table is not modified. This only occurs immediately after the interface is brought up, as if it is in an inconsistent state for a brief period. Steps to reproduce: 1. Create an init script, e.g. /etc/init.d/routetest with the following content: --- BEGIN --- #!/bin/sh -e ### BEGIN INIT INFO # Provides: routetest # Required-Start: $network $local_fs # Required-Stop: $network $local_fs # Default-Start: S # Default-Stop: 0 6 ### END INIT INFO . /lib/lsb/init-functions GW= IP= /sbin/ip -6 route add $GW src $IP dev eth0 table 1 --- END --- 2. Fill in appropriate GW and IP 3. Run 'update-rc.d routetest defaults' to add to init sequence 4. Reboot Expected result: The system boots without errors and has an updated routing table. Actual result: An error is printed: RTNETLINK answers: Invalid argument and the routing table is unchanged. Workaround: Add 'sleep 5' before invocing 'ip' Impact: System is not or only partially reachable over the network because routing table is either missing or incomplete. When used in combination with other packages (e.g. shorewall6) this may lead to an insecure situation in which the inet6 interface is up, with default routing, but without firewall. I haven't observed this behaviour with IPv4. Please let me know if you need any more information to reproduce this. Laurens -- System Information: Debian Release: 7.8 APT prefers stable APT policy: (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 3.2.0-4-amd64 (SMP w/1 CPU core) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages ifupdown depends on: ii dpkg 1.16.15 ii initscripts 2.88dsf-41+deb7u1 ii iproute 20120521-3+b3 ii libc6 2.13-38+deb7u7 ii lsb-base 4.1+Debian8+deb7u1 ifupdown recommends no packages. Versions of packages ifupdown suggests: ii isc-dhcp-client [dhcp-client] 4.2.2.dfsg.1-5+deb70u6 ii net-tools 1.60-24.2 pn ppp <none> pn rdnssd <none> -- no debconf information -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
