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Slow portal speeds

N/A

Slow portal speeds

i've noticed tonight that the portal is being a bit sluggish tonight.
The only other things I have running at the moment are MSN & IRC but the portal is responding at dialup speeds.
External (non-plusnet) sites are working just fine.

I did a bit of digging myself before posting and I noticed the traceroute was a bit odd, with the final hop reporting twice.

traceroute to portal.plus.net (212.159.8.137), 64 hops max, 40 byte packets
1 lo0-plusnet.ptn-ag1.plus.net (195.166.128.123) 35.946 ms 35.984 ms 34.796 ms
2 ge0-0-0-103.ptn-gw1.plus.net (84.92.3.17) 35.958 ms 50.996 ms 36.940 ms
3 gi4-0-23.pth-gw2.plus.net (212.159.4.21) 34.939 ms 35.014 ms 34.946 ms
4 atm0-1-0.ptb-gw1.plus.net (195.166.129.246) 41.959 ms 41.047 ms 40.949 ms
5 vl4.sec.ptb-gw3.plus.net (195.166.129.227) 42.909 ms 41.142 ms 40.880 ms
6 if2.ptb-al1.plus.net (195.166.129.39) 40.993 ms 41.031 ms 41.947 ms
7 if2.ptb-al1.plus.net (195.166.129.39) 40.928 ms 41.085 ms 40.985 ms

The pings are fine but is the problem I'm getting replies from the server twice?

I'll post a packet dump below this post for more detail.
3 REPLIES
N/A

Slow portal speeds

and here's the packet dump of viewing the message.

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tun0, link-type NULL (BSD loopback), capture size 96 bytes
01:22:48.045486 IP xxx.xxx.xxx.xxx.4556 > portal.plus.net.http: F 884680787:884680787(0) ack 584770061 win 64841
01:22:48.045516 IP xxx.xxx.xxx.xxx.4555 > portal.plus.net.http: F 3841478072:3841478072(0) ack 2241254184 win 64698
01:22:48.052215 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: S 1829714865:1829714865(0) win 65535 <mss 1418,nop,nop,sackOK>
01:22:48.086454 IP portal.plus.net.http > xxx.xxx.xxx.xxx.4556: R 584770061:584770061(0) win 0
01:22:48.088438 IP portal.plus.net.http > xxx.xxx.xxx.xxx.4555: R 2241254184:2241254184(0) win 0
01:22:48.093452 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: S 578832043:578832043(0) ack 1829714866 win 5840 <mss 1460,nop,nop,sackOK>
01:22:48.093926 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: . ack 1 win 65535
01:22:48.098444 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: P 1:1103(1102) ack 1 win 65535
01:22:48.173462 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . ack 1103 win 7714
01:22:48.622536 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 1:1419(1418) ack 1103 win 7714
01:22:48.622613 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 1419:2837(1418) ack 1103 win 7714
01:22:48.623597 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: . ack 2837 win 65535
01:22:48.671540 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 2837:4255(1418) ack 1103 win 7714
01:22:48.677480 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 4255:5673(1418) ack 1103 win 7714
01:22:48.678830 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: . ack 5673 win 65535
01:22:48.683467 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 5673:7091(1418) ack 1103 win 7714
01:22:48.732541 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 7091:8509(1418) ack 1103 win 7714
01:22:48.732619 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 8509:9927(1418) ack 1103 win 7714
01:22:48.733351 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: . ack 8509 win 65535
01:22:48.738465 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 9927:11345(1418) ack 1103 win 7714
01:22:48.739149 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: . ack 11345 win 65535
01:22:48.770537 IP xxx.xxx.xxx.xxx.4558 > portal.plus.net.http: S 1732953565:1732953565(0) win 65535 <mss 1418,nop,nop,sackOK>
01:22:48.789493 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: P 11345:12763(1418) ack 1103 win 7714
01:22:48.789545 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 12763:14181(1418) ack 1103 win 7714
01:22:48.790363 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: . ack 14181 win 65535
01:22:48.793472 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 14181:15599(1418) ack 1103 win 7714
01:22:48.799466 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 15599:17017(1418) ack 1103 win 7714
01:22:48.800768 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: . ack 17017 win 65535
01:22:48.806467 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: P 17017:18435(1418) ack 1103 win 7714
01:22:48.811463 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 18435:19853(1418) ack 1103 win 7714
01:22:48.812756 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: . ack 19853 win 65535
01:22:48.813453 IP portal.plus.net.http > xxx.xxx.xxx.xxx.4558: S 574399305:574399305(0) ack 1732953566 win 5840 <mss 1460,nop,nop,sackOK>
01:22:48.813834 IP xxx.xxx.xxx.xxx.4558 > portal.plus.net.http: . ack 1 win 65535
01:22:48.831620 IP xxx.xxx.xxx.xxx.4558 > portal.plus.net.http: P 1:1006(1005) ack 1 win 65535
01:22:48.839489 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 19853:21271(1418) ack 1103 win 7714
01:22:48.845467 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 21271:22689(1418) ack 1103 win 7714
01:22:48.846149 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: . ack 22689 win 65535
01:22:48.857487 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 22689:24107(1418) ack 1103 win 7714
01:22:48.857538 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 24107:25525(1418) ack 1103 win 7714
01:22:48.858363 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: . ack 25525 win 65535
01:22:48.862470 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: . 25525:26943(1418) ack 1103 win 7714
01:22:48.867450 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: P 26943:27942(999) ack 1103 win 7714
01:22:48.868690 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: . ack 27942 win 65535
01:22:48.902469 IP portal.plus.net.http > xxx.xxx.xxx.xxx.4558: . ack 1006 win 7035
01:22:48.927516 IP portal.plus.net.http > xxx.xxx.xxx.xxx.4558: . 1:1419(1418) ack 1006 win 7035
01:22:48.927578 IP portal.plus.net.http > xxx.xxx.xxx.xxx.4558: . 1419:2837(1418) ack 1006 win 7035
01:22:48.928387 IP xxx.xxx.xxx.xxx.4558 > portal.plus.net.http: . ack 2837 win 65535
01:22:48.973470 IP portal.plus.net.http > xxx.xxx.xxx.xxx.4558: P 2837:3531(694) ack 1006 win 7035
01:22:49.163258 IP xxx.xxx.xxx.xxx.4558 > portal.plus.net.http: . ack 3531 win 64841
01:22:49.945516 IP 64.233.183.19.http > xxx.xxx.xxx.xxx.4551: R 1476305527:1476305527(0) win 9300
01:22:55.599540 IP portal.plus.net.http > xxx.xxx.xxx.xxx.4558: F 3531:3531(0) ack 1006 win 7035
01:22:55.600092 IP xxx.xxx.xxx.xxx.4558 > portal.plus.net.http: . ack 3532 win 64841
01:22:55.601473 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: F 27942:27942(0) ack 1103 win 7714
01:22:55.601827 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: . ack 27943 win 65535
01:23:05.179380 IP xxx.xxx.xxx.xxx.fax > portal.plus.net.http: F 1103:1103(0) ack 27943 win 65535
01:23:05.179410 IP xxx.xxx.xxx.xxx.4558 > portal.plus.net.http: F 1006:1006(0) ack 3532 win 64841
01:23:05.219563 IP portal.plus.net.http > xxx.xxx.xxx.xxx.fax: R 578859986:578859986(0) win 0
01:23:05.222507 IP portal.plus.net.http > xxx.xxx.xxx.xxx.4558: R 574402837:574402837(0) win 0


To my untrained eye it looks like I'm getting a few packets multipul times, I hope this is useful to someone on the comms team.

Regards,
Andrew D Wiles
Community Veteran
Posts: 14,469
Registered: 30-07-2007

Slow portal speeds

When did you notice the slowdown?

The portal does go slow between 1am and 1.30am and always has done. During this time, additional services are started because it is usually quiet. These include backups and some automated management scripts.
N/A

Slow portal speeds

Peter,
It was between those times so it could very well have been PNet running the backups and what not.

If i notice it outside of those times I'll do the same checks again.

Cheers,
Andrew D Wiles