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Mxx
Asked: 2013-08-02 08:12:33 +0800 CST

Should rp_filter sysctl parameter be set on bonding master or member slaves?

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I have a server running RHEL6.4.

I need to configure .rp_filter sysctl parameter for my server's private interconnect. This server has 2 NICs bonded together. I looked through the documentation and searched online but haven't found conclusive information how exactly it should be configured.

Should I set it on the bonded interface itself?

net.ipv4.conf.bond0.rp_filter = 0

Or should I set it on the 2 physical slave NICs?

net.ipv4.conf.em1.rp_filter = 0
net.ipv4.conf.em2.rp_filter = 0

I can not use net.ipv4.conf.all.rp_filter or net.ipv4.conf.default.rp_filter.

redhat

2 Answers

  1. Best Answer

    What's good with open source - you can always refer to the source, if you're in doubt.

    A quick search shows that rp_filter is used in function fib_validate_source, which is called only in net/ipv4/route.c, TCP/IP stack implementation for linux.

    So rp_filter doesn't do absolutely anything whether it's enabled or not on an interface without IP address configured.

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  2. Bonding is a layer 2 function; rp_filter is a layer 3 function. So this is probably the wrong question. As @c4f4t0r mentioned, your rp_filter goes where your IP address is.

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