> Does anyone know a way to get stats on the packet sizes being sent > through the network. > > We have MX nodes and cflowd with version 5, but doesn't seem to detail > packet size. > > Are there any accounting features that can be turned on to give us some > information?
If you are exporting netflow information from your routers to a netflow collector, you have all you need to extract information about packet sizes. For instance, the following command from the flow-tools package: % flow-stat -f1 -S3 < ft-v1005.2010-08-24.162001+0200 | more # --- ---- ---- Report Information --- --- --- # # Fields: Total # Symbols: Disabled # Sorting: Descending Field 3 # Name: Average packet size distribution # # Args: flow-stat -f1 -S3 # # # Pkt Size flows octets packets # 1464 177467 498440760 340465 40 191448 9816065 245384 52 63649 4117526 79174 48 50190 3156051 65737 1430 21613 77647710 54299 1420 23541 54095080 38095 576 5335 5527304 9596 64 8856 600034 9374 200 4049 1799247 8996 58 7315 480284 8278 51 5745 413090 8098 60 6954 459630 7659 1500 4950 11404500 7603 As you can see we have to very clear peaks in number of packets, at close to max (1464 bytes) and 40 bytes (presumably TCP ACK). Steinar Haug, Nethelp consulting, [email protected] _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
