Monitoring J-Flow Statistics
This section shows how to clear J-Flow statistics and use the show commands to view J-Flow settings and statistical results.
Clearing J-Flow Statistics
Use the clear ip flow stats command to clear all entries from all flow caches on the virtual router.
clear ip flow stats
host1(config)#clear ip flow stats
J-Flow show Commands
You can monitor the following aspects of J-Flow statistics by using the following commands:
You can use the output filtering feature of the show command to include or exclude lines of output based on a text string that you specify. See JUNOSe System Basics Configuration Guide, Chapter 2, Command-Line Interface, for details.
show ip cache flow
- Max Entries—Maximum number of entries allowed in main cache
- Activity Timeout—Activity timer value
- Inactivity Timeout—Inactivity timer value
- Size—Distribution of IP packets by size
- Percent—Percent distribution of different-sized IP packets
- Protocol - Port—Protocol of the sample and port destination for that sample
- Total Flows—Total number of flows
- Flows/Sec—Number of flows per second
- Packets/Flow—Number of packets per flow
- Bytes/Pkt—Number of bytes per packet
- Packets/Sec—Number of packets per second
- Src. Addr—Source address of sampled packets
- Src. Intf—Source interface of sampled packets
- Dst. Addr—Destination address of sampled packets
- Dst. Intf—Destination interface of sampled packets
- Summary
- Total Flows Processed—Total number of flows processed
- Total Packets—Total number of packets sampled
- Total Bytes—Total number of bytes received
host1#show ip cache flow active brief
29140 packets sampled.
Distribution of IP packets by size.
Size Percent
---------- -------
1 - 32 0.000
64 0.000
96 0.000
128 0.000
160 0.000
192 0.000
224 0.000
256 0.000
288 0.000
320 0.000
352 0.000
384 0.000
416 0.000
448 0.000
480 0.000
512 0.000
544 0.000
576 0.000
1024 96.791
1536 3.209
2048 0.000
2560 0.000
3072 0.000
3584 0.000
4096 0.000
4608 0.000
Total Flows Packets Bytes Packets
Protocol-Port Flows /Sec /Flow /Pkt /Sec
------------------- ---------- --------- ------------ --------- -----------
TCP-telnet 1 0.000 118.000 1014.000 0.000
UDP-whois++ 1 0.008 935.000 1026.000 7.664
------------------ Summary ---------------------
Total Flows Processed: 2
Total Packets 1053
Total Bytes 1078962
------------------------------------------------
- Example 2—Detailed output
NOTE: The output format for this command was modified slightly to fit within the confines of this document.
host1#show ip cache flow active detail
Main Cache
Max Entries: 65536
Activity Timeout: 60 mins.
Inactivity Timeout: 600 secs.
Cache Enabled
32012 packets sampled.
Distribution of IP packets by size.
Size Percent
---------- -------
1 - 32 0.000
64 0.000
96 0.000
128 0.000
160 0.000
192 0.000
224 0.000
256 0.000
288 0.000
320 0.000
352 0.000
384 0.000
416 0.000
448 0.000
480 0.000
512 0.000
544 0.000
576 0.000
1024 96.789
1536 3.211
2048 0.000
2560 0.000
3072 0.000
3584 0.000
4096 0.000
4608 0.000
Packets Bytes Packets
Src.Addr Src.Intf Dst.Addr Dst.Intf Protocol Port /Flow /Packet /Sec
------------- --------- --------- ---------- --------------- --------- --------- ---------
10.20.30.41 258 GigE4/0 12.0.0.2 GigE2/0 TCP-telnet 58.000 1014.000 0.000
10.20.30.41 63 GE4/0 50.60.70.88 UDP-whois++ 1028.000 1026.000 7.672
------------------ Summary ---------------------
Total Flows Processed: 2
Total Packets 1086
Total Bytes 1113540
------------------------------------------------
host1#show ip cache flow history
35604 packets sampled.
Distribution of IP packets by size.
Size Percent
---------- -------
1 - 32 0.000
64 0.000
96 0.000
128 0.000
160 0.000
192 0.000
224 0.000
256 0.000
288 0.000
320 0.000
352 0.000
384 0.000
416 0.000
448 0.000
480 0.000
512 0.000
544 0.000
576 0.000
1024 96.784
1536 3.216
2048 0.000
2560 0.000
3072 0.000
3584 0.000
4096 0.000
4608 0.000
Total Flows Packets Bytes Packets
Protocol Port Flows /Sec /Flow /Pkt /Sec
------------------- ---------- --------- ------------ --------- -----------
TCP-telnet 216 1.450 159.264 1014.000 230.879
------------------ Summary ---------------------
Total Flows Processed: 216
Total Packets 34401
Total Bytes 34882614
------------------------------------------------
show ip flow sampling
host1#show ip flow sampling
Flow sampling is enabled
'Packet Interval' sampling mode is configured.
1 out of every 1000 packets is being sampled.
show ip flow export
host1#show ip flow export
Flow export is enabled
Exporting flows to 40.0.0.2 (9991)
Exporting using source IP address 40.0.0.1
Version 5 flow records
2 flows exported in 1 udp datagrams
0 flows failed due to lack of export packet
0 export packets were sent up to process level
0 export packets were dropped due to no fib
0 export packets were dropped due to adjacency issues
0 export packets were dropped due to fragmentation failures
0 export packets were dropped due to encapsulation fixup failures