Red Hat Bugzilla – Bug 754303
xend: No IP forwarding on Fedora 16
Last modified: 2013-02-11 16:38:07 EST
Description of problem:
I am using Xen with routed interfaces instead of bridged (i.e., network-script network-route). In this case, the "network-route" script should enable kernel port forwarding. However, this is not the case---at least the first time xend runs. Xend runs, but /proc/sys/net/ipv4/ip_forward still contains "0".
But, if I restart xend by hand using "service xend restart", then kernel IP forwarding gets turned on.
At first I thought this may be due to SELinux (perhaps systemd starts xend in a different context than a root shell does). But this is not the case; I get the same behavior when I boot with SELinux in permissive mode.
At this point, I suspect it may be some type of ordering issue between when systemd initializes the kernel's sysctl settings and when it starts xend.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Configure xend to use network-script network-route
2. Boot the system
3. Observe /proc/sys/net/ipv4/ip_forward
/proc/sys/net/ipv4/ip_forward contains 0
/proc/sys/net/ipv4/ip_forward should contain 1 because the network-route script sets it to 1 when xend starts.
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
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Sorry for the lack of response on this bug, but since F16 is EOL real soon now, this won't be fixed for F16. If you can still reproduce this issue on F18, please reopen.