On Wed, Aug 15, 2018 at 8:50 AM, Jon Loeliger <j...@netgate.com> wrote:
> On Wed, Aug 15, 2018 at 12:49 AM, Matus Fabian -X (matfabia - PANTHEON > TECHNOLOGIES at Cisco) <matfa...@cisco.com> wrote: > >> Hi Jon, >> >> >> >> NAT plugin does virtual fragment reassembly – it enables to translate >> non-initial fragments without L4 header otherwise NAT is unable to gather >> port information from the non-initial fragment, packet is still broken into >> several fragments after NAT translation. >> >> >> >> Matus >> > > Thanks, Matus! > > I'm trying to understand how part of the NAT virtual reassembly works > still. > When and how does the drop_frag count come into play? For example, > if an original packet was broken into 3 fragments, and drop_frag was 1 or > 2, > Naturally, I meant the "max_frag" values here. > should all three fragments get dropped? And are they dropped on ingress > or egress? > > Is there a packet trace flow where I can see them being dropped? I ask > because it looks to me like these fragments are only sometimes dropped > when the drop_frag value is exceeded, and it also requires the > And "max_frag" there too. > ip_reassembly_enable_disable to be "on" too. > > I've been doing a "trace add dpdk-input 500", sending my example packets > that need fragmentation, NAT-ing them, and then filtering the trace buffer. > What is the right node to use in the "filter" here? > > Thanks, > jdl > >
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