Created
August 28, 2019 23:27
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iOS 12.4.0 netstat
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Ryans-iPhone:~ root# netstat -sp tcp | |
tcp: | |
222886 packets sent | |
50341 data packets (26956826 bytes) | |
624 data packets (189481 bytes) retransmitted | |
0 resend initiated by MTU discovery | |
137560 ack-only packets (35 delayed) | |
0 URG only packet | |
0 window probe packet | |
25896 window update packets | |
8539 control packets | |
0 data packet sent after flow control | |
219640 checksummed in software | |
94627 segments (75697521 bytes) over IPv4 | |
125013 segments (9929780 bytes) over IPv6 | |
312110 packets received | |
55438 acks (for 26943535 bytes) | |
1006 duplicate acks | |
0 ack for unsent data | |
235617 packets (276920280 bytes) received in-sequence | |
690 completely duplicate packets (117674 bytes) | |
5 old duplicate packets | |
0 received packet dropped due to low memory | |
11 packets with some dup. data (152 bytes duped) | |
17878 out-of-order packets (25533277 bytes) | |
0 packet (0 byte) of data after window | |
0 window probe | |
1425 window update packets | |
1121 packets received after close | |
0 bad reset | |
0 discarded for bad checksum | |
187112 checksummed in software | |
126 segments (0 byte) over IPv4 | |
186986 segments (215350740 bytes) over IPv6 | |
0 discarded for bad header offset field | |
0 discarded because packet too short | |
3711 connection requests | |
1307 connection accepts | |
4 bad connection attempts | |
0 listen queue overflow | |
4910 connections established (including accepts) | |
7458 connections closed (including 209 drops) | |
778 connections updated cached RTT on close | |
778 connections updated cached RTT variance on close | |
263 connections updated cached ssthresh on close | |
4 embryonic connections dropped | |
197233 segments updated rtt (of 50607 attempts) | |
1001 retransmit timeouts | |
62 connections dropped by rexmit timeout | |
0 connection dropped after retransmitting FIN | |
0 persist timeout | |
0 connection dropped by persist timeout | |
210 keepalive timeouts | |
190 keepalive probes sent | |
3 connections dropped by keepalive | |
1382 correct ACK header predictions | |
226080 correct data packet header predictions | |
0 SACK recovery episode | |
0 segment rexmit in SACK recovery episodes | |
130 byte rexmits in SACK recovery episodes | |
41 SACK options (SACK blocks) received | |
48981 SACK options (SACK blocks) sent | |
393 SACK scoreboard overflow | |
0 LRO coalesced packet | |
0 time LRO flow table was full | |
0 collision in LRO flow table | |
0 time LRO coalesced 2 packets | |
0 time LRO coalesced 3 or 4 packets | |
0 time LRO coalesced 5 or more packets | |
0 limited transmit done | |
0 early retransmit done | |
10 times cumulative ack advanced along with SACK | |
4 probe timeouts | |
1829 times retransmit timeout triggered after probe | |
0 time probe packets were sent for an interface | |
3 times couldn't send probe packets for an interface | |
470 times fast recovery after tail loss | |
61 times recovered last packet | |
0 SACK based rescue retransmit | |
0 client connection attempted to negotiate ECN | |
5 client connections successfully negotiated ECN | |
0 time graceful fallback to Non-ECN connection | |
3 times lost ECN negotiating SYN, followed by retransmission | |
0 server connection attempted to negotiate ECN | |
1747 server connections successfully negotiated ECN | |
3 times lost ECN negotiating SYN-ACK, followed by retransmission | |
25 times received congestion experienced (CE) notification | |
37 times CWR was sent in response to ECE | |
619 times sent ECE notification | |
1029 connections received CE atleast once | |
2 connections received ECE atleast once | |
11 connections using ECN have seen packet loss but no CE | |
7 connections using ECN have seen packet loss and CE | |
349 connections using ECN received CE but no packet loss | |
14 connections fell back to non-ECN due to SYN-loss | |
4 connections fell back to non-ECN due to reordering | |
4 connections fell back to non-ECN due to excessive CE-markings | |
0 time packet reordering was detected on a connection | |
0 time transmitted packets were reordered | |
119 times fast recovery was delayed to handle reordering | |
2 times retransmission was avoided by delaying recovery | |
14 retransmissions not needed | |
73 times DSACK option was sent | |
140 times DSACK option was received | |
2 times DSACK was disabled on a connection | |
17 times recovered from bad retransmission using DSACK | |
1 time ignored DSACK due to ack loss | |
492 times ignored old DSACK options | |
0 time PMTU Blackhole detection, size reverted | |
1 connection were dropped after long sleep | |
0 time a TFO-cookie has been announced | |
1 SYN with data and a valid TFO-cookie have been received | |
0 SYN with TFO-cookie-request received | |
0 time an invalid TFO-cookie has been received | |
0 time we requested a TFO-cookie | |
0 time the peer announced a TFO-cookie | |
0 time we combined SYN with data and a TFO-cookie | |
0 time our SYN with data has been acknowledged | |
0 time a connection-attempt with TFO fell back to regular TCP | |
0 time a TFO-connection blackhole'd | |
0 time maximum segment size was changed to default | |
0 time maximum segment size was changed to medium | |
0 time maximum segment size was changed to low | |
0 timer drift less or equal to 1 ms | |
0 timer drift less or equal to 10 ms | |
80216 timer drifts less or equal to 20 ms | |
125 timer drifts less or equal to 50 ms | |
17 timer drifts less or equal to 100 ms | |
21 timer drifts less or equal to 200 ms | |
15 timer drifts less or equal to 500 ms | |
0 timer drift less or equal to 1000 ms | |
0 timer drift greater than to 1000 ms |
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