#### Why I did it
Following the PR https://github.com/sonic-net/sonic-swss-common/pull/739 increasing netlink buffer size in linux kernel
As error is seen in fdbsyncd with netlink reports "out of memory on reading a netlink socket" It is seen when kernel is sending 10k remote mac to fdbsyncd.
#### How I did it
Increase the buffer size of the netlink buffer from 3MB to 16MB
#### How to verify it
Verified with 10k remote mac, and restarting the fdbsyncd process. So that kernel send the bridge fdb dump to the fdbsyncd.
Verified that the netlink buffer error is not reported in the sys log.
Enable fib_multipath_use_neigh for v4
https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt
Why I did:
This is helpful if the neighbor are not directly connected then Kernel forward to unreachable neighbor option. With this option forwarding using neighbor state to be valid.
* [sonic-buildimage] Changes to make network specific sysctl
common for both host and docker namespace (in multi-npu).
This change is triggered with issue found in multi-npu platforms
where in docker namespace
net.ipv6.conf.all.forwarding was 0 (should be 1) because of
which RS/RA message were triggered and link-local router were learnt.
Beside this there were some other sysctl.net.ipv6* params whose value
in docker namespace is not same as host namespace.
So to make we are always in sync in host and docker namespace
created common file that list all sysctl.net.* params and used
both by host and docker namespace. Any change will get applied
to both namespace.
Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>
* Address Review Comments and made sure to invoke augtool
only one and do string concatenation of all set commands
* Address Review Comments.
