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List:       openvswitch-discuss
Subject:    [ovs-discuss] ICMP packets getting dropped
From:       blp () nicira ! com (Ben Pfaff)
Date:       2015-04-24 15:13:04
Message-ID: 20150424151304.GA5371 () nicira ! com
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On Fri, Apr 24, 2015 at 04:20:24PM +0200, Clément Rault wrote:
> I am experiencing a weird behaviour when I test my system with ping.
> 
> I installed flow/group tables so that an alternative path can be found
> in case of a link failure.
> 
> In the test I am breaking the link between s2 and s5 (in mininet) and
> I am seing a really weird behaviour in s5: some packets disappear
> after arriving in this switch...
> 
> What I don't understand is that I didn't put any rule to drop the
> packets. And actually ovs-appctl doesn't show me that any packets are
> dropped (but they are not being forwarded anywhere...):

I'd recommend using the "ovs-appctl ofproto/trace" command to figure out
what's happening to your ICMP packets.  It's documented, see
ovs-vswitchd(8).

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