I thought ct was in that retis trace . I’ll need to capture these events
when they occur again .
I’m also having some issues with huge amounts of loss in the kernal
pipeline that I can’t explain .
When sending traffic VM to VM within a logical switch but going across
GENEVE tunnel I get 30 - 40 Gbps on iperf . When I use the DAT (by sending
traffic to the VM DNAT ) I get huge amounts of loss in the sender kernal ,
retis is saying sk_bff drops .
3.2.2 is absolutely killing me right now. Should I open another thread on
this ?
On Thu, Apr 18, 2024 at 00:15 Adrian Moreno <amore...@redhat.com> wrote:
> Hi Gavin
>
> On 4/18/24 02:38, Gavin McKee via discuss wrote:
> > This is an example.
> >
> > Again the TCP 3 handshake completes , but the next packet fails to NAT
> > and goes out onto the physical network using the private address . An
> > example of this is in the packet trace I provided.
> >
>
> Given you were using retis in your initial troubleshooting, you can use it
> with
> the additional "ct" collector to see if the kernel datapath is retrieving
> the
> right conntrack entry and what's its state. If that shows some unexpected
> conntrack entry change, it can be confirmed by monitoring "conntrack -E".
>
> Additionally, a dp flow dump (ovs-appctl dpctl/dump-flows -m) when the
> problem
> is happening might be also useful.
>
> --
> Adrián
>
>
> > ovs-appctl ofproto/trace br-int
> >
> in_port=7753,dl_src=4e:42:14:a1:2a:fb,dl_dst=1a:16:b1:58:e1:cd,tcp,nw_src=172.27.18.244,nw_dst=104.18.3.35,nw_ttl=32,tcp_src=52776,tcp_dst=443,tcp_flags=2
> > Flow:
> tcp,in_port=7753,vlan_tci=0x0000,dl_src=4e:42:14:a1:2a:fb,dl_dst=1a:16:b1:58:e1:cd,nw_src=172.27.18.244,nw_dst=104.18.3.35,nw_tos=0,nw_ecn=0,nw_ttl=32,nw_frag=no,tp_src=52776,tp_dst=443,tcp_flags=syn
> >
> > bridge("br-int")
> > ----------------
> > 0. in_port=7753, priority 100, cookie 0xc33f39c4
> > set_field:0x16d->reg13
> > set_field:0x155->reg11
> > set_field:0x1cf->reg12
> > set_field:0x12->metadata
> > set_field:0xca->reg14
> > resubmit(,8)
> > 8. metadata=0x12, priority 50, cookie 0x1645d3f2
> > set_field:0/0x1000->reg10
> > resubmit(,73)
> > 73.
> ip,reg14=0xca,metadata=0x12,dl_src=4e:42:14:a1:2a:fb,nw_src=172.27.18.244,
> > priority 90, cookie 0xc33f39c4
> > set_field:0/0x1000->reg10
> > move:NXM_NX_REG10[12]->NXM_NX_XXREG0[111]
> > -> NXM_NX_XXREG0[111] is now 0
> > resubmit(,9)
> > 9. metadata=0x12, priority 0, cookie 0xcc4fd106
> > resubmit(,10)
> > 10. metadata=0x12, priority 0, cookie 0x9e10ad0e
> > resubmit(,11)
> > 11. metadata=0x12, priority 0, cookie 0x557f3249
> > resubmit(,12)
> > 12. ip,metadata=0x12, priority 100, cookie 0x14131a67
> >
> set_field:0x1000000000000000000000000/0x1000000000000000000000000->xxreg0
> > resubmit(,13)
> > 13. metadata=0x12, priority 0, cookie 0x85f9ed4f
> > resubmit(,14)
> > 14. ip,reg0=0x1/0x1,metadata=0x12, priority 100, cookie 0x279651c
> > ct(table=15,zone=NXM_NX_REG13[0..15])
> > drop
> > -> A clone of the packet is forked to recirculate. The forked
> > pipeline will be resumed at table 15.
> > -> Sets the packet to an untracked state, and clears all the
> > conntrack fields.
> >
> > Final flow:
> tcp,reg0=0x1,reg11=0x155,reg12=0x1cf,reg13=0x16d,reg14=0xca,metadata=0x12,in_port=7753,vlan_tci=0x0000,dl_src=4e:42:14:a1:2a:fb,dl_dst=1a:16:b1:58:e1:cd,nw_src=172.27.18.244,nw_dst=104.18.3.35,nw_tos=0,nw_ecn=0,nw_ttl=32,nw_frag=no,tp_src=52776,tp_dst=443,tcp_flags=syn
> > Megaflow:
> recirc_id=0,eth,tcp,in_port=7753,dl_src=4e:42:14:a1:2a:fb,dl_dst=1a:16:b1:58:e1:cd,nw_src=172.27.18.244,nw_frag=no
> > Datapath actions: ct(zone=365),recirc(0x13b5a)
> >
> >
> ===============================================================================
> > recirc(0x13b5a) - resume conntrack with default ct_state=trk|new (use
> > --ct-next to customize)
> >
> ===============================================================================
> >
> > Flow:
> recirc_id=0x13b5a,ct_state=new|trk,ct_zone=365,eth,tcp,reg0=0x1,reg11=0x155,reg12=0x1cf,reg13=0x16d,reg14=0xca,metadata=0x12,in_port=7753,vlan_tci=0x0000,dl_src=4e:42:14:a1:2a:fb,dl_dst=1a:16:b1:58:e1:cd,nw_src=172.27.18.244,nw_dst=104.18.3.35,nw_tos=0,nw_ecn=0,nw_ttl=32,nw_frag=no,tp_src=52776,tp_dst=443,tcp_flags=syn
> >
> > bridge("br-int")
> > ----------------
> > thaw
> > Resuming from table 15
> > 15. ct_state=+new-est+trk,metadata=0x12, priority 7, cookie 0xa9e0ee6f
> >
> set_field:0x80000000000000000000000000/0x80000000000000000000000000->xxreg0
> >
> set_field:0x200000000000000000000000000/0x200000000000000000000000000->xxreg0
> > resubmit(,16)
> > 16. conj_id=2865573479,tcp,reg0=0x80/0x80,reg14=0xca,metadata=0x12,
> > priority 3000, cookie 0xabdec111
> > set_field:0x1000000000000/0x1000000000000->xreg4
> >
> set_field:0x2000000000000000000000000/0x2000000000000000000000000->xxreg0
> > resubmit(,17)
> > 17. reg8=0x10000/0x10000,metadata=0x12, priority 1000, cookie 0x8171c04a
> > set_field:0/0x1000000000000->xreg4
> > set_field:0/0x2000000000000->xreg4
> > set_field:0/0x4000000000000->xreg4
> > resubmit(,18)
> > 18. metadata=0x12, priority 0, cookie 0x62454929
> > resubmit(,19)
> > 19. metadata=0x12, priority 0, cookie 0x3bb47080
> > resubmit(,20)
> > 20. metadata=0x12, priority 0, cookie 0x73face9d
> > resubmit(,21)
> > 21. metadata=0x12, priority 0, cookie 0x8e46634d
> > resubmit(,22)
> > 22. metadata=0x12, priority 0, cookie 0xbddac461
> > resubmit(,23)
> > 23. metadata=0x12, priority 0, cookie 0x9a32c0de
> > resubmit(,24)
> > 24. metadata=0x12, priority 0, cookie 0x79b1c074
> > resubmit(,25)
> > 25. metadata=0x12, priority 0, cookie 0xc02374d3
> > resubmit(,26)
> > 26. metadata=0x12, priority 0, cookie 0x218dc750
> > resubmit(,27)
> > 27. metadata=0x12, priority 0, cookie 0xf6943631
> > set_field:0/0x1000000000000->xreg4
> > set_field:0/0x2000000000000->xreg4
> > set_field:0/0x4000000000000->xreg4
> > resubmit(,28)
> > 28. ip,reg0=0x2/0x2002,metadata=0x12, priority 100, cookie 0x7fdca4fb
> >
> ct(commit,zone=NXM_NX_REG13[0..15],nat(src),exec(set_field:0/0x1->ct_mark))
> > nat(src)
> > set_field:0/0x1->ct_mark
> > -> Sets the packet to an untracked state, and clears all the
> > conntrack fields.
> > resubmit(,29)
> > 29. metadata=0x12, priority 0, cookie 0x34e5fac7
> > resubmit(,30)
> > 30. metadata=0x12, priority 0, cookie 0xac3f53bd
> > resubmit(,31)
> > 31. metadata=0x12, priority 0, cookie 0x54000bd5
> > resubmit(,32)
> > 32. metadata=0x12, priority 0, cookie 0x29ab49f3
> > resubmit(,33)
> > 33. metadata=0x12, priority 0, cookie 0xae6aefcb
> > resubmit(,34)
> > 34. metadata=0x12, priority 0, cookie 0x632dc93b
> > resubmit(,35)
> > 35. metadata=0x12,dl_dst=1a:16:b1:58:e1:cd, priority 50, cookie
> 0x3fa33935
> > set_field:0x1->reg15
> > resubmit(,37)
> > 37. priority 0
> > resubmit(,39)
> > 39. priority 0
> > resubmit(,40)
> > 40. reg15=0x1,metadata=0x12, priority 100, cookie 0x95c785db
> > set_field:0x155->reg11
> > set_field:0x1cf->reg12
> > resubmit(,41)
> > 41. priority 0
> > set_field:0->reg0
> > set_field:0->reg1
> > set_field:0->reg2
> > set_field:0->reg3
> > set_field:0->reg4
> > set_field:0->reg5
> > set_field:0->reg6
> > set_field:0->reg7
> > set_field:0->reg8
> > set_field:0->reg9
> > resubmit(,42)
> > 42. ip,reg15=0x1,metadata=0x12, priority 110, cookie 0xc9a79824
> > resubmit(,43)
> > 43. ip,reg15=0x1,metadata=0x12, priority 110, cookie 0xac7d5d78
> > resubmit(,44)
> > 44. metadata=0x12, priority 0, cookie 0xa1ddb4f6
> > resubmit(,45)
> > 45. ct_state=-trk,metadata=0x12, priority 5, cookie 0xb2622a65
> >
> set_field:0x100000000000000000000000000/0x100000000000000000000000000->xxreg0
> >
> set_field:0x200000000000000000000000000/0x200000000000000000000000000->xxreg0
> > resubmit(,46)
> > 46. metadata=0x12, priority 0, cookie 0x267ae0e3
> > resubmit(,47)
> > 47. metadata=0x12, priority 0, cookie 0x914392c3
> > set_field:0/0x1000000000000->xreg4
> > set_field:0/0x2000000000000->xreg4
> > set_field:0/0x4000000000000->xreg4
> > resubmit(,48)
> > 48. metadata=0x12, priority 0, cookie 0xc4f6a97f
> > resubmit(,49)
> > 49. metadata=0x12, priority 0, cookie 0x8ebb0c71
> > resubmit(,50)
> > 50. metadata=0x12, priority 0, cookie 0x61e385f4
> > resubmit(,51)
> > 51. metadata=0x12, priority 0, cookie 0x4c722ce1
> > set_field:0/0x1000->reg10
> > resubmit(,75)
> > 75. No match.
> > drop
> > move:NXM_NX_REG10[12]->NXM_NX_XXREG0[111]
> > -> NXM_NX_XXREG0[111] is now 0
> > resubmit(,52)
> > 52. metadata=0x12, priority 0, cookie 0x3c01b89d
> > resubmit(,64)
> > 64. priority 0
> > resubmit(,65)
> > 65. reg15=0x1,metadata=0x12, priority 100, cookie 0x95c785db
> >
> clone(ct_clear,set_field:0->reg11,set_field:0->reg12,set_field:0->reg13,set_field:0x4cc->reg11,set_field:0x383->reg12,set_field:0x13->metadata,set_field:0x1->reg14,set_field:0->reg10,set_field:0->reg15,set_field:0->reg0,set_field:0->reg1,set_field:0->reg2,set_field:0->reg3,set_field:0->reg4,set_field:0->reg5,set_field:0->reg6,set_field:0->reg7,set_field:0->reg8,set_field:0->reg9,resubmit(,8))
> > ct_clear
> > set_field:0->reg11
> > set_field:0->reg12
> > set_field:0->reg13
> > set_field:0x4cc->reg11
> > set_field:0x383->reg12
> > set_field:0x13->metadata
> > set_field:0x1->reg14
> > set_field:0->reg10
> > set_field:0->reg15
> > set_field:0->reg0
> > set_field:0->reg1
> > set_field:0->reg2
> > set_field:0->reg3
> > set_field:0->reg4
> > set_field:0->reg5
> > set_field:0->reg6
> > set_field:0->reg7
> > set_field:0->reg8
> > set_field:0->reg9
> > resubmit(,8)
> > 8. reg14=0x1,metadata=0x13,dl_dst=1a:16:b1:58:e1:cd, priority 50,
> > cookie 0x8522832c
> >
> set_field:0x1a16b158e1cd0000000000000000/0xffffffffffff0000000000000000->xxreg0
> > resubmit(,9)
> > 9. metadata=0x13, priority 0, cookie 0xef4dd8a9
> > set_field:0x4/0x4->xreg4
> > resubmit(,10)
> > 10. reg9=0x4/0x4,metadata=0x13, priority 100, cookie 0x37718dd7
> > resubmit(,79)
> > 79.
> ip,reg14=0x1,metadata=0x13,dl_src=4e:42:14:a1:2a:fb,nw_src=172.27.18.244,
> > priority 100, cookie 0x2e544767
> > drop
> > resubmit(,11)
> > 11. metadata=0x13, priority 0, cookie 0x3c2eb1b
> > resubmit(,12)
> > 12. metadata=0x13, priority 0, cookie 0x44f62446
> > resubmit(,13)
> > 13. metadata=0x13, priority 0, cookie 0x3842bec6
> > resubmit(,14)
> > 14. metadata=0x13, priority 0, cookie 0xfd7b2ab9
> > resubmit(,15)
> > 15. metadata=0x13, priority 0, cookie 0xefbd7e27
> > resubmit(,16)
> > 16. metadata=0x13, priority 0, cookie 0xf439d853
> > resubmit(,17)
> > 17. metadata=0x13, priority 0, cookie 0x123f01f0
> > resubmit(,18)
> > 18. metadata=0x13, priority 0, cookie 0x142cd59b
> > resubmit(,19)
> > 19. metadata=0x13, priority 0, cookie 0x297e0190
> > resubmit(,20)
> > 20. metadata=0x13, priority 0, cookie 0x61e9e3c7
> > set_field:0/0xffffffff->xxreg1
> > resubmit(,21)
> > 21. ip,reg7=0,metadata=0x13, priority 1, cookie 0x9f114f3d
> > dec_ttl()
> > set_field:0/0xffff00000000->xreg4
> >
> set_field:0x64646401000000000000000000000000/0xffffffff000000000000000000000000->xxreg0
> >
> set_field:0x646464030000000000000000/0xffffffff0000000000000000->xxreg0
> > set_field:2a:d5:d1:e8:89:cc->eth_src
> > set_field:0x2->reg15
> > set_field:0x1/0x1->reg10
> > resubmit(,22)
> > 22. reg8=0/0xffff,metadata=0x13, priority 150, cookie 0x6ece899a
> > resubmit(,23)
> > 23. metadata=0x13, priority 0, cookie 0x72437536
> > set_field:0/0xffff00000000->xreg4
> > resubmit(,24)
> > 24. reg8=0/0xffff,metadata=0x13, priority 150, cookie 0xce06f1
> > resubmit(,25)
> > 25. ip,metadata=0x13, priority 1, cookie 0xf690342c
> > push:NXM_NX_REG0[]
> > push:NXM_NX_XXREG0[96..127]
> > pop:NXM_NX_REG0[]
> > -> NXM_NX_REG0[] is now 0x64646401
> > set_field:00:00:00:00:00:00->eth_dst
> > resubmit(,66)
> > 66. reg0=0x64646401,reg15=0x2,metadata=0x13, priority 100, cookie
> 0x97b4353d
> > set_field:00:00:5e:00:01:ff->eth_dst
> > set_field:0x40/0x40->reg10
> > pop:NXM_NX_REG0[]
> > -> NXM_NX_REG0[] is now 0x64646401
> > resubmit(,26)
> > 26. metadata=0x13, priority 0, cookie 0x6c2ad4cc
> > resubmit(,27)
> > 27. metadata=0x13, priority 0, cookie 0xadc9fb4f
> > resubmit(,28)
> > 28. ip,reg15=0x2,metadata=0x13,nw_src=172.27.18.244, priority 100,
> > cookie 0xfa923492
> > set_field:4e:42:14:a1:2a:fb->eth_src
> >
> set_field:0xcc3418740000000000000000/0xffffffff0000000000000000->xxreg0
> > resubmit(,29)
> > 29. metadata=0x13, priority 0, cookie 0x571bbf77
> > resubmit(,37)
> > 37. priority 0
> > resubmit(,39)
> > 39. priority 0
> > resubmit(,40)
> > 40. reg15=0x2,metadata=0x13, priority 100, cookie 0x407086d0
> > set_field:0x4cc->reg11
> > set_field:0x383->reg12
> > resubmit(,41)
> > 41. priority 0
> > set_field:0->reg0
> > set_field:0->reg1
> > set_field:0->reg2
> > set_field:0->reg3
> > set_field:0->reg4
> > set_field:0->reg5
> > set_field:0->reg6
> > set_field:0->reg7
> > set_field:0->reg8
> > set_field:0->reg9
> > resubmit(,42)
> > 42. metadata=0x13, priority 0, cookie 0x4c3b7fcc
> > set_field:0/0x10->xreg4
> > resubmit(,43)
> > 43. ip,reg15=0x2,metadata=0x13,nw_src=172.27.18.244, priority 100,
> > cookie 0x540f90b2
> > set_field:4e:42:14:a1:2a:fb->eth_src
> > ct(table=44,zone=NXM_NX_REG11[0..15],nat)
> > nat
> > -> A clone of the packet is forked to recirculate. The forked
> > pipeline will be resumed at table 44.
> > -> Sets the packet to an untracked state, and clears all the
> > conntrack fields.
> >
> > Final flow:
> recirc_id=0x13b5a,eth,tcp,reg0=0x300,reg11=0x155,reg12=0x1cf,reg13=0x16d,reg14=0xca,reg15=0x1,metadata=0x12,in_port=7753,vlan_tci=0x0000,dl_src=4e:42:14:a1:2a:fb,dl_dst=1a:16:b1:58:e1:cd,nw_src=172.27.18.244,nw_dst=104.18.3.35,nw_tos=0,nw_ecn=0,nw_ttl=32,nw_frag=no,tp_src=52776,tp_dst=443,tcp_flags=syn
> > Megaflow:
> recirc_id=0x13b5a,ct_state=+new-est-rel-rpl-inv+trk,ct_mark=0/0x1,eth,tcp,in_port=7753,dl_src=4e:42:14:a1:2a:fb,dl_dst=1a:16:b1:58:e1:cd,nw_src=172.27.18.244,nw_dst=
> 104.0.0.0/5,nw_ttl=32,nw_frag=no,tp_src=0x8000/0x8000,tp_dst=0x180/0xffc0
> > Datapath actions:
> >
> ct(commit,zone=365,mark=0/0x1,nat(src)),set(eth(dst=00:00:5e:00:01:ff)),set(ipv4(ttl=31)),ct(zone=1228,nat),recirc(0x13b5c)
> >
> >
> ===============================================================================
> > recirc(0x13b5c) - resume conntrack with default ct_state=trk|new (use
> > --ct-next to customize)
> > Replacing src/dst IP/ports to simulate NAT:
> > Initial flow:
> > Modified flow:
> >
> ===============================================================================
> >
> > Flow:
> recirc_id=0x13b5c,ct_state=new|trk,ct_zone=1228,eth,tcp,reg10=0x41,reg11=0x4cc,reg12=0x383,reg14=0x1,reg15=0x2,metadata=0x13,in_port=7753,vlan_tci=0x0000,dl_src=4e:42:14:a1:2a:fb,dl_dst=00:00:5e:00:01:ff,nw_src=172.27.18.244,nw_dst=104.18.3.35,nw_tos=0,nw_ecn=0,nw_ttl=31,nw_frag=no,tp_src=52776,tp_dst=443,tcp_flags=syn
> >
> > bridge("br-int")
> > ----------------
> > thaw
> > Resuming from table 44
> > 44. metadata=0x13, priority 0, cookie 0x48ef0c42
> > resubmit(,45)
> > 45. ct_state=-rpl+trk,ip,reg15=0x2,metadata=0x13,nw_src=172.27.18.244,
> > priority 161, cookie 0x5414262a
> > set_field:4e:42:14:a1:2a:fb->eth_src
> > ct(commit,table=46,zone=NXM_NX_REG12[0..15],nat(src=204.52.24.116))
> > nat(src=204.52.24.116)
> > -> A clone of the packet is forked to recirculate. The forked
> > pipeline will be resumed at table 46.
> > -> Sets the packet to an untracked state, and clears all the
> > conntrack fields.
> >
> > Final flow:
> recirc_id=0x13b5c,eth,tcp,reg10=0x41,reg11=0x4cc,reg12=0x383,reg14=0x1,reg15=0x2,metadata=0x13,in_port=7753,vlan_tci=0x0000,dl_src=4e:42:14:a1:2a:fb,dl_dst=00:00:5e:00:01:ff,nw_src=172.27.18.244,nw_dst=104.18.3.35,nw_tos=0,nw_ecn=0,nw_ttl=31,nw_frag=no,tp_src=52776,tp_dst=443,tcp_flags=syn
> > Megaflow:
> recirc_id=0x13b5c,ct_state=-rpl+trk,eth,ip,in_port=7753,dl_src=4e:42:14:a1:2a:fb,nw_src=172.27.18.244,nw_frag=no
> > Datapath actions:
> ct(commit,zone=899,nat(src=204.52.24.116)),recirc(0x25f9b)
> >
> >
> ===============================================================================
> > recirc(0x25f9b) - resume conntrack with default ct_state=trk|new (use
> > --ct-next to customize)
> > Replacing src/dst IP/ports to simulate NAT:
> > Initial flow:
> nw_src=172.27.18.244,tp_src=52776,nw_dst=104.18.3.35,tp_dst=443
> > Modified flow:
> nw_src=204.52.24.116,tp_src=52776,nw_dst=104.18.3.35,tp_dst=443
> >
> ===============================================================================
> >
> > Flow:
> recirc_id=0x25f9b,ct_state=new|trk,ct_zone=899,eth,tcp,reg10=0x41,reg11=0x4cc,reg12=0x383,reg14=0x1,reg15=0x2,metadata=0x13,in_port=7753,vlan_tci=0x0000,dl_src=4e:42:14:a1:2a:fb,dl_dst=00:00:5e:00:01:ff,nw_src=204.52.24.116,nw_dst=104.18.3.35,nw_tos=0,nw_ecn=0,nw_ttl=31,nw_frag=no,tp_src=52776,tp_dst=443,tcp_flags=syn
> >
> > bridge("br-int")
> > ----------------
> > thaw
> > Resuming from table 46
> > 46. metadata=0x13, priority 0, cookie 0x3800cb88
> > resubmit(,47)
> > 47. metadata=0x13, priority 0, cookie 0xc2575be2
> > resubmit(,48)
> > 48. reg15=0x2,metadata=0x13, priority 100, cookie 0xaf19a22a
> > resubmit(,64)
> > 64. reg10=0x1/0x1,reg15=0x2,metadata=0x13, priority 100, cookie
> 0x407086d0
> > push:NXM_OF_IN_PORT[]
> > set_field:ANY->in_port
> > resubmit(,65)
> > 65. reg15=0x2,metadata=0x13, priority 100, cookie 0x407086d0
> >
> clone(ct_clear,set_field:0->reg11,set_field:0->reg12,set_field:0->reg13,set_field:0x2c2->reg11,set_field:0x327->reg12,set_field:0x1->metadata,set_field:0xa->reg14,set_field:0->reg10,set_field:0->reg15,set_field:0->reg0,set_field:0->reg1,set_field:0->reg2,set_field:0->reg3,set_field:0->reg4,set_field:0->reg5,set_field:0->reg6,set_field:0->reg7,set_field:0->reg8,set_field:0->reg9,resubmit(,8))
> > ct_clear
> > set_field:0->reg11
> > set_field:0->reg12
> > set_field:0->reg13
> > set_field:0x2c2->reg11
> > set_field:0x327->reg12
> > set_field:0x1->metadata
> > set_field:0xa->reg14
> > set_field:0->reg10
> > set_field:0->reg15
> > set_field:0->reg0
> > set_field:0->reg1
> > set_field:0->reg2
> > set_field:0->reg3
> > set_field:0->reg4
> > set_field:0->reg5
> > set_field:0->reg6
> > set_field:0->reg7
> > set_field:0->reg8
> > set_field:0->reg9
> > resubmit(,8)
> > 8. metadata=0x1, priority 50, cookie 0x1645d3f2
> > set_field:0/0x1000->reg10
> > resubmit(,73)
> > 73. No match.
> > drop
> > move:NXM_NX_REG10[12]->NXM_NX_XXREG0[111]
> > -> NXM_NX_XXREG0[111] is now 0
> > resubmit(,9)
> > 9. metadata=0x1, priority 0, cookie 0xcc4fd106
> > resubmit(,10)
> > 10. metadata=0x1, priority 0, cookie 0x9e10ad0e
> > resubmit(,11)
> > 11. metadata=0x1, priority 0, cookie 0x557f3249
> > resubmit(,12)
> > 12. metadata=0x1, priority 0, cookie 0x915c56b1
> > resubmit(,13)
> > 13. ip,reg14=0xa,metadata=0x1, priority 110, cookie 0xccdcd3e1
> > resubmit(,14)
> > 14. metadata=0x1, priority 0, cookie 0x134ce32f
> > resubmit(,15)
> > 15. metadata=0x1, priority 65535, cookie 0x49627e5f
> > resubmit(,16)
> > 16. metadata=0x1, priority 65535, cookie 0xc947843d
> > resubmit(,17)
> > 17. metadata=0x1, priority 0, cookie 0xd2fb4d2
> > resubmit(,18)
> > 18. metadata=0x1, priority 0, cookie 0x62454929
> > resubmit(,19)
> > 19. metadata=0x1, priority 0, cookie 0x3bb47080
> > resubmit(,20)
> > 20. metadata=0x1, priority 0, cookie 0x73face9d
> > resubmit(,21)
> > 21. metadata=0x1, priority 0, cookie 0x8e46634d
> > resubmit(,22)
> > 22. metadata=0x1, priority 0, cookie 0xbddac461
> > resubmit(,23)
> > 23. metadata=0x1, priority 0, cookie 0x9a32c0de
> > resubmit(,24)
> > 24. metadata=0x1, priority 0, cookie 0x79b1c074
> > resubmit(,25)
> > 25. metadata=0x1, priority 0, cookie 0xc02374d3
> > resubmit(,26)
> > 26. metadata=0x1, priority 0, cookie 0x218dc750
> > resubmit(,27)
> > 27. metadata=0x1, priority 0, cookie 0x8db4eebc
> > resubmit(,28)
> > 28. metadata=0x1, priority 0, cookie 0x6deecbbe
> > resubmit(,29)
> > 29. metadata=0x1, priority 0, cookie 0x34e5fac7
> > resubmit(,30)
> > 30. metadata=0x1, priority 0, cookie 0xac3f53bd
> > resubmit(,31)
> > 31. metadata=0x1, priority 0, cookie 0x54000bd5
> > resubmit(,32)
> > 32. metadata=0x1, priority 0, cookie 0x29ab49f3
> > resubmit(,33)
> > 33. metadata=0x1, priority 0, cookie 0xae6aefcb
> > resubmit(,34)
> > 34. metadata=0x1, priority 0, cookie 0x632dc93b
> > resubmit(,35)
> > 35. metadata=0x1, priority 0, cookie 0x9961115c
> > set_field:0->reg15
> > resubmit(,71)
> > 71. No match.
> > drop
> > resubmit(,36)
> > 36. reg15=0,metadata=0x1, priority 50, cookie 0x62255993
> > set_field:0x8001->reg15
> > resubmit(,37)
> > 37. priority 0
> > resubmit(,39)
> > 39. priority 0
> > resubmit(,40)
> > 40. reg15=0x8001,metadata=0x1, priority 100, cookie 0x11699429
> > set_field:0x14->reg13
> > set_field:0x1->reg15
> > resubmit(,41)
> > 41. priority 0
> > set_field:0->reg0
> > set_field:0->reg1
> > set_field:0->reg2
> > set_field:0->reg3
> > set_field:0->reg4
> > set_field:0->reg5
> > set_field:0->reg6
> > set_field:0->reg7
> > set_field:0->reg8
> > set_field:0->reg9
> > resubmit(,42)
> > 42. metadata=0x1, priority 0, cookie 0x9ad1480d
> > resubmit(,43)
> > 43. ip,reg15=0x1,metadata=0x1, priority 110, cookie
> 0xca4977d3
> > ct_clear
> > resubmit(,44)
> > 44. metadata=0x1, priority 0, cookie 0xa1ddb4f6
> > resubmit(,45)
> > 45. metadata=0x1, priority 65535, cookie 0x91b4350e
> > resubmit(,46)
> > 46. metadata=0x1, priority 65535, cookie 0xfc9c351d
> > resubmit(,47)
> > 47. metadata=0x1, priority 0, cookie 0xb984696e
> > resubmit(,48)
> > 48. metadata=0x1, priority 0, cookie 0xc4f6a97f
> > resubmit(,49)
> > 49. metadata=0x1, priority 0, cookie 0x8ebb0c71
> > resubmit(,50)
> > 50. metadata=0x1, priority 0, cookie 0x61e385f4
> > resubmit(,51)
> > 51. metadata=0x1, priority 0, cookie 0x4c722ce1
> > set_field:0/0x1000->reg10
> > resubmit(,75)
> > 75. No match.
> > drop
> > move:NXM_NX_REG10[12]->NXM_NX_XXREG0[111]
> > -> NXM_NX_XXREG0[111] is now 0
> > resubmit(,52)
> > 52. metadata=0x1, priority 0, cookie 0x3c01b89d
> > resubmit(,64)
> > 64. priority 0
> > resubmit(,65)
> > 65. reg15=0x1,metadata=0x1, priority 100, cookie
> 0x4581da82
> > push_vlan:0x8100
> > set_field:4216->vlan_vid
> > output:7754
> >
> > bridge("br-provider")
> > ---------------------
> > 0. priority 0
> > NORMAL
> > -> forwarding to learned port
> > pop_vlan
> > set_field:0x8001->reg15
> > pop:NXM_OF_IN_PORT[]
> > -> NXM_OF_IN_PORT[] is now 7753
> >
> > Final flow: unchanged
> > Megaflow:
> recirc_id=0x25f9b,ct_state=+new-est-rel-rpl-inv+trk,ct_mark=0/0x1,eth,ip,in_port=7753,dl_src=4e:42:14:a1:2a:fb,dl_dst=00:00:5e:00:01:ff,nw_dst=
> 0.0.0.0/1,nw_frag=no
> > Datapath actions: ct_clear,push_vlan(vid=120,pcp=0),5
> >
> > On Wed, 17 Apr 2024 at 17:32, Gavin McKee <gavmcke...@googlemail.com>
> wrote:
> >>
> >> That information is all in the email
> >>
> >> The openflow trace is showing that the pipeline is fine . This is why
> I’m worried about a deeper issue with the kernal / openvswitch kernal
> module / connection tracking
> >>
> >>
> >>
> >> On Wed, Apr 17, 2024 at 16:33 Flavio Leitner <f...@sysclose.org> wrote:
> >>>
> >>> On Wed, 17 Apr 2024 12:26:27 -0700
> >>> Gavin McKee <gavmcke...@googlemail.com> wrote:
> >>>
> >>>> Hi Flavio,
> >>>>
> >>>> I had to restart the Open vSwitch across 16 machines to resolve the
> >>>> issue for a customer . I think it will occur again and when it does
> >>>> I'll use that command to gather the tc information.
> >>>>
> >>>> Until then I think I have found why the issue is occurring .
> >>>>
> >>>> Take a look at the output below (this is a packet capture from the
> >>>> physical interface on the compute node , so traffic that has gone
> >>>> through the OVS Openflow pipeline) - we make a 3 way handshake with R2
> >>>> , and establish the connection. A packet goes missing - TLS
> >>>> handshake, it then appears that it hasn't gone through NAT as it's
> >>>> using the Private IP of the VM .
> >>>
> >>>
> >>> If that is the case, you might be able to see if the data path
> >>> is matching correctly and the actions are using NAT with
> >>> ovs-appctl ofproto/trace.
> >>>
> >>> fbl
> >>>
> >>>
> >>>>
> >>>> Take a look at frame 14
> >>>>
> >>>> No. Time Source Destination
> >>>> Protocol Length Info
> >>>> Delta
> >>>> 14 09:24:08.064432 172.27.18.244 104.18.2.35
> >>>> TLSv1 502 Client Hello, Alert (Level: Fatal, Description: Decode
> >>>> Error) 2.362983
> >>>>
> >>>> Frame 14: 502 bytes on wire (4016 bits), 502 bytes captured (4016
> >>>> bits) Ethernet II, Src: 4e:42:14:a1:2a:fb (4e:42:14:a1:2a:fb), Dst:
> >>>> IETF-VRRP-VRID_ff (00:00:5e:00:01:ff)
> >>>> 802.1Q Virtual LAN, PRI: 0, DEI: 0, ID: 120
> >>>> Internet Protocol Version 4, Src: 172.27.18.244, Dst: 104.18.2.35
> >>>> Transmission Control Protocol, Src Port: 57394, Dst Port: 443, Seq: 1,
> >>>> Ack: 1, Len: 444
> >>>> Transport Layer Security
> >>>> TLSv1 Record Layer: Handshake Protocol: Client Hello
> >>>> Content Type: Handshake (22)
> >>>> Version: TLS 1.0 (0x0301)
> >>>> Length: 432
> >>>> Handshake Protocol: Client Hello
> >>>> TLSv1 Record Layer: Alert (Level: Fatal, Description: Decode
> >>>> Error) Content Type: Alert (21)
> >>>> Version: TLS 1.0 (0x0301)
> >>>> Length: 2
> >>>> Alert Message
> >>>> Level: Fatal (2)
> >>>> Description: Decode Error (50)
> >>>>
> >>>>
> >>>>
> >>>>
> ------------------------------------------------------------------------------------------------------------
> >>>>
> >>>> On Wed, 17 Apr 2024 at 11:28, Flavio Leitner <f...@sysclose.org>
> wrote:
> >>>>>
> >>>>>
> >>>>> Hi Gavin,
> >>>>>
> >>>>> It would be helpful if you can provide some TC dumps from the
> >>>>> "good" state to the "bad" state to see how it was and what changes.
> >>>>> Something like:
> >>>>>
> >>>>> # tc -s filter show dev enp148s0f0_1 ingress
> >>>>>
> >>>>> I haven't checked the attached files, but one suggestion is to
> >>>>> check if this is not a csum issue.
> >>>>>
> >>>>> Thanks,
> >>>>> fbl
> >>>>>
> >>>>>
> >>>>> On Tue, 16 Apr 2024 13:17:10 -0700
> >>>>> Gavin McKee via discuss <ovs-discuss@openvswitch.org> wrote:
> >>>>>
> >>>>>> Adding information relating to the Open VSwitch kernal module
> >>>>>> @Ilya Maximets @Numan Siddique Can either of you help out here?
> >>>>>>
> >>>>>>
> >>>>>> modinfo openvswitch
> >>>>>> filename:
> >>>>>>
> /lib/modules/5.14.0-362.8.1.el9_3.x86_64/kernel/net/openvswitch/openvswitch.ko.xz
> >>>>>> alias: net-pf-16-proto-16-family-ovs_ct_limit
> >>>>>> alias: net-pf-16-proto-16-family-ovs_meter
> >>>>>> alias: net-pf-16-proto-16-family-ovs_packet
> >>>>>> alias: net-pf-16-proto-16-family-ovs_flow
> >>>>>> alias: net-pf-16-proto-16-family-ovs_vport
> >>>>>> alias: net-pf-16-proto-16-family-ovs_datapath
> >>>>>> license: GPL
> >>>>>> description: Open vSwitch switching datapath
> >>>>>> rhelversion: 9.3
> >>>>>> srcversion: 8A2159D727C8BADC82261B8
> >>>>>> depends: nf_conntrack,nf_conncount,libcrc32c,nf_nat
> >>>>>> retpoline: Y
> >>>>>> intree: Y
> >>>>>> name: openvswitch
> >>>>>> vermagic: 5.14.0-362.8.1.el9_3.x86_64 SMP preempt mod_unload
> >>>>>> modversions sig_id: PKCS#7
> >>>>>> signer: Rocky kernel signing key
> >>>>>> sig_key:
> >>>>>> 17:CA:DE:1F:EC:D1:59:2D:9F:52:34:C6:7C:09:06:81:3D:74:7C:F7
> >>>>>> sig_hashalgo: sha256 signature:
> >>>>>> 67:31:56:70:86:DB:57:69:8D:4A:9B:A7:ED:17:F3:67:65:98:97:08:
> >>>>>> 1F:FB:4D:F8:A8:2D:7C:A7:7D:3A:57:85:CA:67:9D:82:72:EB:54:14:
> >>>>>> F2:BB:40:78:AD:85:56:2D:EF:D5:00:95:38:A4:86:9F:5F:29:1A:81:
> >>>>>> 32:94:B4:87:41:94:A0:3E:71:A5:97:44:2E:42:DD:F7:42:6B:69:94:
> >>>>>> E3:AB:6E:E5:4F:C9:60:57:70:07:5F:CA:C7:83:7A:2F:C7:81:62:FF:
> >>>>>> 53:AF:AC:2B:06:D8:08:D3:1D:A7:F0:43:10:98:DE:B1:62:AE:89:A5:
> >>>>>> FE:EF:74:09:0F:2D:0F:D9:73:A5:59:75:D0:87:1E:EA:3A:40:86:1E:
> >>>>>> 76:E5:E7:3B:59:2E:3A:7E:65:F3:92:A1:B4:84:48:3F:43:A0:D7:1C:
> >>>>>> 21:29:E0:B6:D1:10:36:15:88:43:6A:11:8F:55:EE:1B:F9:53:3B:86:
> >>>>>> EF:81:71:17:81:08:EC:53:30:D6:69:8E:13:11:D5:DF:15:75:88:50:
> >>>>>> 69:19:51:3B:41:6B:6F:E0:7A:30:33:32:E6:60:18:02:A6:0C:63:9B:
> >>>>>> C5:D7:2F:6A:D0:BA:45:03:19:0E:21:E8:18:FB:E8:D1:C1:33:05:36:
> >>>>>> 1F:9B:0F:29:3F:05:51:7A:30:86:88:B7:C7:44:2E:2B:50:F9:EF:4F:
> >>>>>> D4:70:EA:1B:33:E2:F0:E3:E2:88:00:E5:BF:06:E2:D4:B7:81:EE:6E:
> >>>>>> 89:02:18:65:8B:1C:84:42:2F:89:14:63:1D:51:70:37:42:C5:68:DD:
> >>>>>> 4D:12:7B:07:33:2B:C6:BC:8F:7F:23:D7:58:DF:47:AC:DE:08:67:FE:
> >>>>>> CB:E8:E6:4D:95:2F:6B:F5:07:4D:32:92:80:0A:7C:D1:B6:81:EE:AB:
> >>>>>> 26:C3:C6:22:77:00:5E:64:DE:96:0E:9F:A4:A0:F0:45:9F:19:73:EB:
> >>>>>> CC:60:AE:E9:63:E2:6D:2E:BA:65:9B:BD:04:CC:13:C2:55:88:05:03:
> >>>>>> 1B:30:18:8B
> >>>>>>
> >>>>>> On Tue, 16 Apr 2024 at 11:12, Gavin McKee
> >>>>>> <gavmcke...@googlemail.com> wrote:
> >>>>>>>
> >>>>>>> Hi,
> >>>>>>>
> >>>>>>> I need some help with strange OVS behaviours.
> >>>>>>>
> >>>>>>> ovs-vsctl (Open vSwitch) 3.2.2
> >>>>>>> ovn-controller 23.09.1
> >>>>>>> Open vSwitch Library 3.2.2
> >>>>>>>
> >>>>>>> TLDR: We need to restart Open VSwitch in order for TLS traffic
> >>>>>>> to work between a VM and Cloudflare R2. After restarting Open
> >>>>>>> VSwitch the TLS connection works fine.
> >>>>>>> (see attached pcap tls-error.txt)
> >>>>>>>
> >>>>>>> See the attached openflow traces - they show a flow trace from
> >>>>>>> Open Vswitch.
> >>>>>>>
> >>>>>>> Also there is a retis trace (retis tool discussed at Open
> >>>>>>> VSwitch conference 2023).
> >>>>>>>
> >>>>>>> Note the drop (TC_INGRESS) in this file
> >>>>>>> + 1702601116185568 [swapper/140] 0 [tp] skb:kfree_skb
> >>>>>>> #60c81b6b91e2cff284fb3a3d65800 (skb 18386033671255367680) n 3
> >>>>>>> drop (TC_INGRESS)
> >>>>>>> if 21 (enp148s0f0_1) rxif 21 172.27.18.244.57394 >
> >>>>>>> 104.18.2.35.443 ttl 63 tos 0x0 id 26162 off 0 [DF] len 477 proto
> >>>>>>> TCP (6) flags [P.] seq 792060930:792061367 ack 951229219 win 11
> >>>>>>>
> >>>>>>> Again , once I restart Open vSwitch the problem goes away for a
> >>>>>>> time and comes back sometime later (not sure what that time
> >>>>>>> frame is but its a recurring issue.)
> >>>>>> _______________________________________________
> >>>>>> discuss mailing list
> >>>>>> disc...@openvswitch.org
> >>>>>> https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
> >>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> fbl
> >>>
> >>>
> >>>
> >>> --
> >>> fbl
> > _______________________________________________
> > discuss mailing list
> > disc...@openvswitch.org
> > https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
>
>
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