[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: throughput improvements
I work for a satellite based ISP...
Here is a snapshot of some data that may get you started. It's the CEF flow
statistics of the traffic coming from three Cisco routers connecting to my
upstream ISPs. This is for the traffic going toward the satellite links; I
don't have data for the traffic coming back. These three represent about
150Megabits/second daily peak on a five minute average (MRTG).
Hopefully you will find the packet size distribution data useful.
**************************************************
**************************************************
ash-ccr-02#show ip cac flow
IP packet size distribution (2709M total packets):
1-32 64 96 128 160 192 224 256 288 320 352 384 416 448
480
.001 .304 .053 .023 .068 .015 .013 .010 .007 .006 .004 .006 .006 .005
.004
512 544 576 1024 1536 2048 2560 3072 3584 4096 4608
.004 .004 .260 .014 .185 .000 .000 .000 .000 .000 .000
IP Flow Switching Cache, 4456704 bytes
9561 active, 55975 inactive, 222864669 added
418369334 ager polls, 0 flow alloc failures
Active flows timeout in 30 minutes
Inactive flows timeout in 15 seconds
last clearing of statistics never
Protocol Total Flows Packets Bytes Packets Active(Sec)
Idle(Sec)
-------- Flows /Sec /Flow /Pkt /Sec /Flow /Flow
TCP-Telnet 923629 2.2 10 166 22.8 33.5 22.2
TCP-FTP 712871 1.7 2 72 4.3 4.7 20.5
TCP-FTPD 268984 0.6 22 690 14.7 37.8 22.0
TCP-WWW 137001562 332.8 11 581 3932.0 8.2 16.5
TCP-SMTP 7367835 17.9 16 410 295.3 17.8 15.3
TCP-X 3082 0.0 9 150 0.0 16.4 15.8
TCP-BGP 2304 0.0 101 119 0.5 165.4 20.8
TCP-NNTP 441047 1.0 11 220 11.9 35.1 22.4
TCP-Frag 1286 0.0 10 57 0.0 10.5 22.4
TCP-other 43566106 105.8 12 529 1302.6 18.1 19.7
UDP-DNS 3933340 9.5 2 95 25.5 4.5 22.3
UDP-NTP 53894 0.1 1 76 0.1 0.0 22.7
UDP-TFTP 271 0.0 2 83 0.0 1.9 20.7
UDP-Frag 3782 0.0 154 702 1.4 50.2 23.0
UDP-other 21151471 51.3 17 121 904.1 4.3 22.6
ICMP 7411758 18.0 3 69 61.8 4.3 22.9
IPINIP 1 0.0 4 104 0.0 3.0 18.3
GRE 284 0.0 538 133 0.3 141.5 22.8
IP-other 11601 0.0 78 409 2.1 168.1 21.8
Total: 222855108 541.4 12 491 6580.2 10.1 18.1
**************************************************
**************************************************
sjc-ccr-01#show ip cac flow
IP packet size distribution (51329M total packets):
1-32 64 96 128 160 192 224 256 288 320 352 384 416 448
480
.002 .447 .126 .027 .020 .009 .008 .005 .005 .004 .003 .005 .004 .002
.002
512 544 576 1024 1536 2048 2560 3072 3584 4096 4608
.002 .002 .122 .014 .181 .000 .000 .000 .000 .000 .000
IP Flow Switching Cache, 4456704 bytes
0 active, 65536 inactive, 65853 added
1282799 ager polls, 0 flow alloc failures
Active flows timeout in 30 minutes
Inactive flows timeout in 15 seconds
last clearing of statistics never
Protocol Total Flows Packets Bytes Packets Active(Sec)
Idle(Sec)
-------- Flows /Sec /Flow /Pkt /Sec /Flow /Flow
TCP-Telnet 1818080 0.4 5 181 2.3 10.7 46.5
TCP-FTP 32756564 8.0 3 62 29.0 7.2 47.1
TCP-FTPD 1471307 0.3 158 924 57.5 81.5 36.8
TCP-WWW 1439655398 355.8 12 692 4613.1 11.4 44.6
TCP-SMTP 83482005 20.6 15 404 313.5 18.6 36.0
TCP-X 25771 0.0 15 397 0.0 25.9 49.3
TCP-BGP 662979 0.1 2 52 0.3 14.1 28.9
TCP-NNTP 222896 0.0 121 1185 6.6 38.5 43.2
TCP-Frag 51394 0.0 13 122 0.1 16.1 48.5
TCP-other 549602723 135.8 15 601 2085.6 22.3 44.7
UDP-DNS 143969611 35.5 3 87 112.5 5.6 46.3
UDP-NTP 2182971 0.5 1 76 0.6 11.2 35.4
UDP-TFTP 14978 0.0 2 80 0.0 3.2 57.2
UDP-Frag 106557 0.0 215 1112 5.6 38.7 46.7
UDP-other 622427117 153.8 33 74 5164.9 5.1 52.2
ICMP 185057663 45.7 3 132 180.8 9.8 47.8
IGMP 1356 0.0 4 649 0.0 1.4 30.5
IPINIP 4548 0.0 36 98 0.0 73.0 34.0
GRE 145331 0.0 1148 166 41.2 196.9 26.2
IP-other 1497987 0.3 191 306 70.8 88.6 29.3
Total: 3065157236 757.6 16 401 12685.4 11.9 46.2
**************************************************
**************************************************
sjc-ccr-02#show ip cac flow
IP packet size distribution (36018M total packets):
1-32 64 96 128 160 192 224 256 288 320 352 384 416 448
480
.019 .285 .227 .029 .013 .007 .009 .005 .004 .004 .003 .004 .004 .002
.002
512 544 576 1024 1536 2048 2560 3072 3584 4096 4608
.002 .003 .155 .014 .202 .000 .000 .000 .000 .000 .000
IP Flow Switching Cache, 4456704 bytes
5705 active, 59831 inactive, 1248335821 added
82873875 ager polls, 0 flow alloc failures
Active flows timeout in 30 minutes
Inactive flows timeout in 15 seconds
last clearing of statistics never
Protocol Total Flows Packets Bytes Packets Active(Sec)
Idle(Sec)
-------- Flows /Sec /Flow /Pkt /Sec /Flow /Flow
TCP-Telnet 2207642 0.5 8 188 4.6 21.4 21.7
TCP-FTP 20858733 5.1 2 64 13.6 4.5 21.3
TCP-FTPD 1192435 0.2 83 982 24.5 46.9 16.7
TCP-WWW 1351276996 333.9 11 677 3905.8 8.7 15.7
TCP-SMTP 51001900 12.6 16 355 201.7 13.6 14.9
TCP-X 103459 0.0 16 632 0.4 16.8 19.2
TCP-BGP 355932 0.0 3 220 0.3 7.2 12.0
TCP-NNTP 932796 0.2 245 1451 56.6 29.5 22.3
TCP-Frag 45896 0.0 7 92 0.0 4.1 20.0
TCP-other 476041394 117.6 12 601 1490.6 16.6 19.4
UDP-DNS 73598583 18.1 6 80 112.8 3.6 22.5
UDP-NTP 1337752 0.3 1 76 0.3 1.3 22.2
UDP-TFTP 16659 0.0 2 54 0.0 3.1 18.9
UDP-Frag 73596 0.0 208 1188 3.7 33.7 21.5
UDP-other 574563013 141.9 19 69 2826.8 3.0 18.2
ICMP 94787331 23.4 9 113 222.2 4.8 22.6
IGMP 22 0.0 334 1388 0.0 54.7 23.8
IPINIP 23 0.0 707 104 0.0 736.1 13.9
GRE 68013 0.0 378 202 6.3 101.8 21.4
IP-other 659217 0.1 181 542 29.5 92.3 21.1
Total: 2649121392 654.6 13 446 8900.3 8.7 17.4
**************************************************
**************************************************
-----Original Message-----
From: Karsten Siebert [mailto:Karsten.Siebert@sv-gmbh.de]
Sent: Monday, March 24, 2003 4:59 AM
To: ip-dvb@ERG.ABDN.AC.UK
Subject: throughput improvements
Are there any ISP reps in this list ? We would be interested in getting some
information about IP packet length distribution in a standard Sat-ISP
environment. We are currently investigating, where we can save some overhead
bytes in the stream and encountered that it really makes sense only, if
there are a lot of small packets (in terms of IP payload) in the
distribution. (What for instance is the percentage of TCP acks in the
Sat-link ?, large packets ?, medium size ?)
Thanks,
Karsten