Network stack unstable after arp flapping

[K. Macy]

Correct. Set it to zero and the flowtable will be bypassed.

flowtable.c:
static uint32_t
ipv6_flow_lookup_hash_internal(
	struct sockaddr_in6 *ssin6, struct sockaddr_in6 *dsin6,
	    uint32_t *key, uint16_t flags)
{
	uint16_t sport, dport;
	uint8_t proto;
	int offset = 0;

	if ((V_flowtable_enable == 0) || (V_flowtable_ready == 0))
		return (0);


Ciao

On Mon, Apr 4, 2011 at 11:53 AM, Frederique Rijsdijk
<frederique at isafeelin.org> wrote:
> Kip,
>
> Which sysctl are we talking about exactly? Just to be sure..
>
> net.inet.flowtable.enable ?
>
>
> -- Frederique
>
>
>
> On Sun, Apr 03, 2011 at 08:11:33PM +0200, K. Macy wrote:
>> I don't think it was properly tested when it was enabled for IPv6.
>> Given that I have been absentee it really should not be in the default
>> kernel or at least the sysctl should be off. Sorry for the
>> inconvenience. Additionally, you don't need to rebuild you can just
>> disable the sysctl.
>>
>>
>>  -Kip
>> On Sunday, April 3, 2011, Frederique Rijsdijk <frederique at isafeelin.org> wrote:
>> > Steve,
>> >
>> > On 01-04-11 16:50, Steve Polyack wrote:
>> >> On 04/01/11 10:16, Frederique Rijsdijk wrote:
>> > [ .. ]
>> >>> Mar 31 18:36:12 srv01 kernel: arp: x.x.x.1 moved from
>> >>> 00:00:0c:9f:f0:3d to 00:00:0c:07:ac:3d on bge0
>> > [ .. ]
>> >>> The result of that, is that loads of FreeBSD machines (6.x, 7.x and
>> >>> 8.x) developed serious network issues, mainly being no or slow traffic
>> > [ .. ]
>> >>> Any ideas anyone?
>> >> We experienced a similar issue here, but IIRC only on our 8.x systems
>> >> (we don't have any 7.x).  Disabling flowtable cleared everything up
>> >> immediately.  You can try that and see if it helps.
>> >
>> > AFAIK this feature was introduced in 8.x? Btw you are here referring to
>> > UDP, we had issues with TCP. It could still be related, perhaps I'll get
>> > around emulating the situation and see if I can reproduce it.
>> >
>> >
>> > -- Frederique
>> >
>> >
>> > _______________________________________________
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