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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