Thank you Andrew for taking the time and responding to my questions. Much appreciated.
On Tue, Sep 15, 2020 at 2:01 AM Andrew 👽 Yourtchenko <ayour...@gmail.com> wrote: > Hi Venkat, > > Before doing ACL checks, acl-plugin checks the establshed sessions on > the given interface. > > If an already established session is hit the action is set to "3" and > no further ACL check is done, which is what you see in your output. > > For that case, the ACL# in the trace is a special-case "-1", same as > lc_index-1 - because we actually never get it to ACL lookup so do not > need it; and the rule# is the session index; and the trace_bits tells > us that this session is classifed to use timeout type "3", which is > defined in acl_timeout_e as "ACL_TIMEOUT_TCP_TRANSIENT" - which makes > sense, since you are sending the packets in one direction and thus the > session never establishes and the timeout type never changes to > "TCP_IDLE". > > Of the packets you sent in total, 15002 packets had hit the ACL#3 > rule and caused the sessions to be created. The rest of the packets > had hit the established session entries and this is one of those that > you have captured. > > At the time of taking the outputs the traffic was stopped and the > sessions were deleted by idle timeout (which for the transient state > is short). > > Does this make sense ? > > --a > > > > > On 9/14/20, Venkat <venkat.dabb...@gmail.com> wrote: > > Hello Andrew, > > > > I am doing a simple test by sending TCP flows from Trex traffic > generator. > > Traffic source is 16.0.0.1-16.0.0.100 and destination is > > 48.0.0.1-48.0.0.100. > > I am sending TCP traffic with CPS=50 from 100 clients to 100 servers via > > Trex http profile. > > > > I have a reflective ACL to permit the flow for the above src and dst. > > I expect the packet to hit acl index 3 rule 0 and get permitted. > > However, I see the following match in the packet trace which doesn't seem > > like it is hitting acl index 3 and rule 0 but hitting some other acl > index > > (acl -1 and lc_index -1). > > What is the behavior here? Please provide some context here.. > > > > 03:47:03:874624: acl-plugin-in-ip4-fa > > > > acl-plugin: lc_index: -1, sw_if_index 1, next index 1, action: 3, match: > acl > > -1 rule 13309 trace_bits 80010303 > > > > pkt info 0000000000000000 0000000000000000 0000000000000000 > 4300003043000010 > > 0001010600502d14 0310ffff00000000 > > > > lc_index 0 l3 ip4 16.0.0.67 -> 48.0.0.67 l4 lsb_of_sw_if_index 1 proto 6 > > l4_is_input 1 l4_slow_path 0 l4_flags 0x01 port 11540 -> 80 tcp flags > > (valid) 10 rsvd 0 > > > > DBGvpp# show acl-plugin acl > > > > acl-index 0 count 2 tag > > {99998-sra-inbound-sasefwpro-nags-explicit-deny-99998} > > > > 0: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 0 sport 0 dport 0 > > > > 1: ipv6 deny src ::/0 dst ::/0 proto 0 sport 0 dport 0 > > > > applied inbound on sw_if_index: 1 > > > > applied outbound on sw_if_index: > > > > used in lookup context index: 1 > > > > acl-index 1 count 6 tag > > {99999-sra-inbound-sasefwpro-sase-default-fw-profile} > > > > 0: ipv4 permit+reflect src 0.0.0.0/0 dst 0.0.0.0/0 proto 6 sport 0-65535 > > dport 0-65535 > > > > 1: ipv6 permit+reflect src ::/0 dst ::/0 proto 6 sport 0-65535 dport > > 0-65535 > > > > 2: ipv4 permit+reflect src 0.0.0.0/0 dst 0.0.0.0/0 proto 17 sport > 0-65535 > > dport 0-65535 > > > > 3: ipv6 permit+reflect src ::/0 dst ::/0 proto 17 sport 0-65535 dport > > 0-65535 > > > > 4: ipv4 permit+reflect src 0.0.0.0/0 dst 0.0.0.0/0 proto 1 sport 0-65535 > > dport 0-65535 > > > > 5: ipv4 permit+reflect src 0.0.0.0/0 dst 0.0.0.0/0 proto 1 sport 0-65535 > > dport 0-65535 > > > > applied inbound on sw_if_index: 1 > > > > applied outbound on sw_if_index: > > > > used in lookup context index: 1 > > > > acl-index 2 count 6 tag > > {99999-sra-outbound-sasefwpro-sase-default-fw-profile} > > > > 0: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 6 sport 0-65535 dport > > 0-65535 > > > > 1: ipv6 deny src ::/0 dst ::/0 proto 6 sport 0-65535 dport 0-65535 > > > > 2: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 17 sport 0-65535 dport > > 0-65535 > > > > 3: ipv6 deny src ::/0 dst ::/0 proto 17 sport 0-65535 dport 0-65535 > > > > 4: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 1 sport 0-65535 dport > > 0-65535 > > > > 5: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 1 sport 0-65535 dport > > 0-65535 > > > > applied inbound on sw_if_index: > > > > applied outbound on sw_if_index: 1 > > > > used in lookup context index: 0 > > > > acl-index 3 count 1 tag {100-allow-48} > > > > 0: ipv4 permit+reflect src 16.0.0.0/16 dst 48.0.0.0/16 proto 0 sport 0 > dport > > 0 > > > > applied inbound on sw_if_index: 1 > > > > used in lookup context index: 1 > > > > DBGvpp# > > > > DBGvpp# show acl-plugin tables > > > > Stats counters enabled for interface ACLs: 0 > > > > Mask-type entries: > > > > 0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000000000000000 0800ffffffffffff refcount 4 > > > > 1: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 000000ff00000000 0e00ffffffffffff refcount 24 > > > > 2: 0000000000000000 0000000000000000 0000000000000000 0000ffff0000ffff > > 0000000000000000 0800ffffffffffff refcount 2 > > > > Mask-ready ACL representations > > > > acl-index 0 bitmask-ready layout > > > > applied lc_index list: 1 > > > > 0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000000000000000 0000000000000000 base mask index 0 acl 0 rule 0 action 0 > > > > 1: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000000000000000 0800000000000000 base mask index 0 acl 0 rule 1 action 0 > > > > acl-index 1 bitmask-ready layout > > > > applied lc_index list: 1 > > > > 0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000000600000000 0200000100000000 base mask index 1 acl 1 rule 0 action 2 > > > > 1: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000000600000000 0a00000100000000 base mask index 1 acl 1 rule 1 action 2 > > > > 2: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000001100000000 0200000100000000 base mask index 1 acl 1 rule 2 action 2 > > > > 3: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000001100000000 0a00000100000000 base mask index 1 acl 1 rule 3 action 2 > > > > 4: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000000100000000 0200000100000000 base mask index 1 acl 1 rule 4 action 2 > > > > 5: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000000100000000 0200000100000000 base mask index 1 acl 1 rule 5 action 2 > > > > acl-index 2 bitmask-ready layout > > > > applied lc_index list: 0 > > > > 0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000000600000000 0200000100000000 base mask index 1 acl 2 rule 0 action 0 > > > > 1: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000000600000000 0a00000100000000 base mask index 1 acl 2 rule 1 action 0 > > > > 2: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000001100000000 0200000100000000 base mask index 1 acl 2 rule 2 action 0 > > > > 3: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000001100000000 0a00000100000000 base mask index 1 acl 2 rule 3 action 0 > > > > 4: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000000100000000 0200000100000000 base mask index 1 acl 2 rule 4 action 0 > > > > 5: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > 0000000100000000 0200000100000000 base mask index 1 acl 2 rule 5 action 0 > > > > acl-index 3 bitmask-ready layout > > > > applied lc_index list: 1 > > > > 0: 0000000000000000 0000000000000000 0000000000000000 0000003000000010 > > 0000000000000000 0000000200000000 base mask index 2 acl 3 rule 0 action 2 > > > > Applied lookup entries for lookup contexts > > > > lc_index 0: > > > > applied acls: 2 > > > > applied mask info entries: > > > > 0: mask type index 1 first rule index 0 num_entries 6 max_collisions 2 > > > > lookup applied entries: > > > > 0: acl 2 rule 0 action 0 bitmask-ready rule 0 mask type index: 1 > > colliding_rules: 1 collision_head_ae_idx 0 hitcount 0 acl_pos: 0 > > > > 0: acl 2 ace 0 acl pos 0 pae index: 0 > > > > 1: acl 2 rule 1 action 0 bitmask-ready rule 1 mask type index: 1 > > colliding_rules: 1 collision_head_ae_idx 1 hitcount 0 acl_pos: 0 > > > > 0: acl 2 ace 1 acl pos 0 pae index: 1 > > > > 2: acl 2 rule 2 action 0 bitmask-ready rule 2 mask type index: 1 > > colliding_rules: 1 collision_head_ae_idx 2 hitcount 0 acl_pos: 0 > > > > 0: acl 2 ace 2 acl pos 0 pae index: 2 > > > > 3: acl 2 rule 3 action 0 bitmask-ready rule 3 mask type index: 1 > > colliding_rules: 1 collision_head_ae_idx 3 hitcount 0 acl_pos: 0 > > > > 0: acl 2 ace 3 acl pos 0 pae index: 3 > > > > 4: acl 2 rule 4 action 0 bitmask-ready rule 4 mask type index: 1 > > colliding_rules: 2 collision_head_ae_idx 4 hitcount 0 acl_pos: 0 > > > > 0: acl 2 ace 4 acl pos 0 pae index: 4 > > > > 1: acl 2 ace 5 acl pos 0 pae index: 5 > > > > 5: acl 2 rule 5 action 0 bitmask-ready rule 5 mask type index: 1 > > colliding_rules: 0 collision_head_ae_idx 4 hitcount 0 acl_pos: 0 > > > > lc_index 1: > > > > applied acls: 3, 0, 1 > > > > applied mask info entries: > > > > 0: mask type index 2 first rule index 0 num_entries 1 max_collisions 1 > > > > 1: mask type index 0 first rule index 1 num_entries 2 max_collisions 1 > > > > 2: mask type index 1 first rule index 3 num_entries 6 max_collisions 2 > > > > lookup applied entries: > > > > 0: acl 3 rule 0 action 2 bitmask-ready rule 0 mask type index: 2 > > colliding_rules: 1 collision_head_ae_idx 0 hitcount 150001 acl_pos: 0 > > > > 0: acl 3 ace 0 acl pos 0 pae index: 0 > > > > 1: acl 0 rule 0 action 0 bitmask-ready rule 0 mask type index: 0 > > colliding_rules: 1 collision_head_ae_idx 1 hitcount 0 acl_pos: 1 > > > > 0: acl 0 ace 0 acl pos 1 pae index: 1 > > > > 2: acl 0 rule 1 action 0 bitmask-ready rule 1 mask type index: 0 > > colliding_rules: 1 collision_head_ae_idx 2 hitcount 0 acl_pos: 1 > > > > 0: acl 0 ace 1 acl pos 1 pae index: 2 > > > > 3: acl 1 rule 0 action 2 bitmask-ready rule 0 mask type index: 1 > > colliding_rules: 1 collision_head_ae_idx 3 hitcount 0 acl_pos: 2 > > > > 0: acl 1 ace 0 acl pos 2 pae index: 3 > > > > 4: acl 1 rule 1 action 2 bitmask-ready rule 1 mask type index: 1 > > colliding_rules: 1 collision_head_ae_idx 4 hitcount 0 acl_pos: 2 > > > > 0: acl 1 ace 1 acl pos 2 pae index: 4 > > > > 5: acl 1 rule 2 action 2 bitmask-ready rule 2 mask type index: 1 > > colliding_rules: 1 collision_head_ae_idx 5 hitcount 0 acl_pos: 2 > > > > 0: acl 1 ace 2 acl pos 2 pae index: 5 > > > > 6: acl 1 rule 3 action 2 bitmask-ready rule 3 mask type index: 1 > > colliding_rules: 1 collision_head_ae_idx 6 hitcount 0 acl_pos: 2 > > > > 0: acl 1 ace 3 acl pos 2 pae index: 6 > > > > 7: acl 1 rule 4 action 2 bitmask-ready rule 4 mask type index: 1 > > colliding_rules: 2 collision_head_ae_idx 7 hitcount 0 acl_pos: 2 > > > > 0: acl 1 ace 4 acl pos 2 pae index: 7 > > > > 1: acl 1 ace 5 acl pos 2 pae index: 8 > > > > 8: acl 1 rule 5 action 2 bitmask-ready rule 5 mask type index: 1 > > colliding_rules: 0 collision_head_ae_idx 7 hitcount 0 acl_pos: 2 > > > > ACL lookup hash table: > > > > Hash table ACL plugin rule lookup bihash > > > > 13 active elements 13 active buckets > > > > 1 free lists > > > > 0 linear search buckets > > > > arena: base 7f7377ff0000, next 80d00 > > > > used 527616 b (0 Mbytes) of 67108864 b (64 Mbytes) > > > > DBGvpp# show acl-plugin sessions > > > > Sessions total: add 150002 - del 150002 = 0 > > > > Sessions active: add 150002 - deact 150002 = 0 > > > > Sessions being purged: deact 150002 - del 150002 = 0 > > > > now: 38259162493998 clocks per second: 2500000000 > > > > Per-thread data: > > > > Thread #0: > > > > connection add/del stats: > > > > sw_if_index 0: add 0 - del 0 = 0; epoch chg: 0 > > > > sw_if_index 1: add 150002 - del 150002 = 0; epoch chg: 0 > > > > sw_if_index 2: add 0 - del 0 = 0; epoch chg: 0 > > > > sw_if_index 3: add 0 - del 0 = 0; epoch chg: 0 > > > > sw_if_index 4: add 0 - del 0 = 0; epoch chg: 0 > > > > sw_if_index 5: add 0 - del 0 = 0; epoch chg: 0 > > > > sw_if_index 6: add 0 - del 0 = 0; epoch chg: 0 > > > > sw_if_index 7: add 0 - del 0 = 0; epoch chg: 0 > > > > sw_if_index 8: add 0 - del 0 = 0; epoch chg: 0 > > > > sw_if_index 9: add 0 - del 0 = 0; epoch chg: 0 > > > > connection timeout type lists: > > > > fa_conn_list_head[0]: -1 > > > > fa_conn_list_head[1]: -1 > > > > fa_conn_list_head[2]: -1 > > > > fa_conn_list_head[3]: -1 > > > > fa_conn_list_head[4]: -1 > > > > Next expiry time: 0 > > > > Requeue until time: 0 > > > > Current time wait interval: 0 > > > > Count of deleted sessions: 150002 > > > > Delete already deleted: 0 > > > > Session timers restarted: 150750 > > > > Swipe until this time: 0 > > > > sw_if_index serviced bitmap: 2 > > > > pending clear intfc bitmap : > > > > clear in progress: 0 > > > > interrupt is pending: 0 > > > > interrupt is needed: 0 > > > > interrupt is unwanted: 0 > > > > interrupt generation: 14572 > > > > received session change requests: 0 > > > > sent session change requests: 0 > > > > Conn cleaner thread counters: > > > > 33: delete_by_sw_index events > > > > 30: delete_by_sw_index handled ok > > > > 0: unknown events received > > > > 0: session idle timers restarted > > > > 14567: event wait with timeout called > > > > 5: event wait w/o timeout called > > > > 14571: total event cycles > > > > Interrupt generation: 14572 > > > > Sessions per interval: min 1 max 100 increment: 100 ms current: 500 ms > > > > Reclassify sessions: 0 > > > > IPv6 Session lookup hash table: > > > > Hash table ACL plugin FA IPv6 session bihash > > > > [empty, uninitialized] > > > > IPv4 Session lookup hash table: > > > > Hash table ACL plugin FA IPv4 session bihash > > > > 0 active elements 0 active buckets > > > > 5 free lists > > > > [len 1] 51199 free elts > > > > [len 2] 4504 free elts > > > > [len 4] 373 free elts > > > > [len 8] 9 free elts > > > > [len 16] 1 free elts > > > > 0 linear search buckets > > > > arena: base 7f5abb720000, next 7b84c0 > > > > used 8094912 b (7 Mbytes) of 1073741824 b (1024 Mbytes) > > > > DBGvpp# show nat44 addresses > > > > NAT44 pool addresses: > > > > 172.24.114.39 > > > > tenant VRF independent > > > > 0 busy udp ports > > > > 15001 busy tcp ports > > > > 0 busy icmp ports > > > > NAT44 twice-nat pool addresses: > > > > 10.40.1.254 > > > > tenant VRF independent > > > > 0 busy udp ports > > > > 0 busy tcp ports > > > > 0 busy icmp ports > > > > DBGvpp# > > > > Packet 50 > > > > 03:47:03:874592: dpdk-input > > > > lan-ens6 rx queue 0 > > > > buffer 0x8b222: current data 0, length 54, buffer-pool 0, ref-count 1, > > totlen-nifb 0, trace handle 0x31 > > > > ext-hdr-valid > > > > l4-cksum-computed l4-cksum-correct > > > > PKT MBUF: port 0, nb_segs 1, pkt_len 54 > > > > buf_len 2176, data_len 54, ol_flags 0x0, data_off 128, phys_addr > 0x6fec8900 > > > > packet_type 0x110 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0 > > > > rss 0x3aa73aa7 fdir.hi 0x0 fdir.lo 0x3aa73aa7 > > > > Packet Types > > > > RTE_PTYPE_L3_IPV4 (0x0010) IPv4 packet without extension headers > > > > RTE_PTYPE_L4_TCP (0x0100) TCP packet > > > > IP4: 02:85:36:20:e4:87 -> 02:2e:53:e6:4f:e1 > > > > TCP: 16.0.0.67 -> 48.0.0.67 > > > > tos 0x00, ttl 128, length 40, checksum 0x80f9 > > > > fragment id 0x7951 > > > > TCP: 11540 -> 80 > > > > seq. 0x181a45db ack 0x181af226 > > > > flags 0x10 ACK, tcp header: 20 bytes > > > > window 32768, checksum 0x59b4 > > > > 03:47:03:874606: ethernet-input > > > > frame: flags 0x3, hw-if-index 1, sw-if-index 1 > > > > IP4: 02:85:36:20:e4:87 -> 02:2e:53:e6:4f:e1 > > > > 03:47:03:874620: ip4-input-no-checksum > > > > TCP: 16.0.0.67 -> 48.0.0.67 > > > > tos 0x00, ttl 128, length 40, checksum 0x80f9 > > > > fragment id 0x7951 > > > > TCP: 11540 -> 80 > > > > seq. 0x181a45db ack 0x181af226 > > > > flags 0x10 ACK, tcp header: 20 bytes > > > > window 32768, checksum 0x59b4 > > > > 03:47:03:874624: acl-plugin-in-ip4-fa > > > > acl-plugin: lc_index: -1, sw_if_index 1, next index 1, action: 3, match: > acl > > -1 rule 13309 trace_bits 80010303 > > > > pkt info 0000000000000000 0000000000000000 0000000000000000 > 4300003043000010 > > 0001010600502d14 0310ffff00000000 > > > > lc_index 0 l3 ip4 16.0.0.67 -> 48.0.0.67 l4 lsb_of_sw_if_index 1 proto 6 > > l4_is_input 1 l4_slow_path 0 l4_flags 0x01 port 11540 -> 80 tcp flags > > (valid) 10 rsvd 0 > > > > 03:47:03:874634: ip4-lookup > > > > fib 0 dpo-idx 53 flow hash: 0x00000000 > > > > TCP: 16.0.0.67 -> 48.0.0.67 > > > > tos 0x00, ttl 128, length 40, checksum 0x80f9 > > > > fragment id 0x7951 > > > > TCP: 11540 -> 80 > > > > seq. 0x181a45db ack 0x181af226 > > > > flags 0x10 ACK, tcp header: 20 bytes > > > > window 32768, checksum 0x59b4 > > > > 03:47:03:874639: ip4-load-balance > > > > fib 0 dpo-idx 14 flow hash: 0x00000000 > > > > TCP: 16.0.0.67 -> 48.0.0.67 > > > > tos 0x00, ttl 128, length 40, checksum 0x80f9 > > > > fragment id 0x7951 > > > > TCP: 11540 -> 80 > > > > seq. 0x181a45db ack 0x181af226 > > > > flags 0x10 ACK, tcp header: 20 bytes > > > > window 32768, checksum 0x59b4 > > > > 03:47:03:874655: ip4-rewrite > > > > tx_sw_if_index 2 dpo-idx 14 : ipv4 via 172.24.115.166 wan-ens7: mtu:9000 > > 02fcbaad303302c6e54357a50800 flow hash: 0x00000000 > > > > 00000000: > 02fcbaad303302c6e54357a5080045000028795100007f0681f9100000433000 > > > > 00000020: 00432d140050181a45db181af2265010800059b400002a2a2a2a2a2a > > > > 03:47:03:874660: nat44-ed-in2out-output > > > > NAT44_IN2OUT_ED_FAST_PATH: sw_if_index 1, next index 0, session 34066 > > > > 03:47:03:874681: wan-ens7-output > > > > wan-ens7 l4-cksum-computed l4-cksum-correct natted l2_hdr_offset_valid > > l3_hdr_offset_valid > > > > IP4: 02:c6:e5:43:57:a5 -> 02:fc:ba:ad:30:33 > > > > TCP: 172.24.114.39 -> 48.0.0.67 > > > > tos 0x00, ttl 127, length 40, checksum 0x73fc > > > > fragment id 0x7951 > > > > TCP: 8447 -> 80 > > > > seq. 0x181a45db ack 0x181af226 > > > > flags 0x10 ACK, tcp header: 20 bytes > > > > window 32768, checksum 0x57cc > > > > 03:47:03:874685: wan-ens7-tx > > > > wan-ens7 tx queue 0 > > > > buffer 0x8b222: current data 0, length 54, buffer-pool 0, ref-count 1, > > totlen-nifb 0, trace handle 0x31 > > > > ext-hdr-valid > > > > l4-cksum-computed l4-cksum-correct natted l2-hdr-offset 0 l3-hdr-offset > 14 > > > > PKT MBUF: port 0, nb_segs 1, pkt_len 54 > > > > buf_len 2176, data_len 54, ol_flags 0x0, data_off 128, phys_addr > 0x6fec8900 > > > > packet_type 0x110 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0 > > > > rss 0x3aa73aa7 fdir.hi 0x0 fdir.lo 0x3aa73aa7 > > > > Packet Types > > > > RTE_PTYPE_L3_IPV4 (0x0010) IPv4 packet without extension headers > > > > RTE_PTYPE_L4_TCP (0x0100) TCP packet > > > > IP4: 02:c6:e5:43:57:a5 -> 02:fc:ba:ad:30:33 > > > > TCP: 172.24.114.39 -> 48.0.0.67 > > > > tos 0x00, ttl 127, length 40, checksum 0x73fc > > > > fragment id 0x7951 > > > > TCP: 8447 -> 80 > > > > seq. 0x181a45db ack 0x181af226 > > > > flags 0x10 ACK, tcp header: 20 bytes > > > > window 32768, checksum 0x57cc > > >
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