Bug 116081

Summary: netns (linux namespace) ip and ipv6 forwarding bug
Product: Networking Reporter: Alexey Boldyrev (ne-vlezay80)
Component: OtherAssignee: Stephen Hemminger (stephen)
Status: NEW ---    
Severity: high Keywords: trivial
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 4.x, 3.x, 2.6.x Subsystem:
Regression: No Bisected commit-id:

Description Alexey Boldyrev 2016-04-09 10:53:35 UTC 
Send '1' from:
# ip netns exec Int bash
# echo 1 >/proc/sys/net/ipv6/conf/all/forwarding
Returned:
cat /proc/sys/net/ipv6/conf/all/forwarding
0
# exit

I also want to note that if you include the physical interface, it disappears from: /proc/sys/net/ipv6/conf/

The same is true in ipv4