Network Interfaces Problem - Monitoring equipment


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Network Interfaces Problem - Monitoring equipment

Dear gurus of Linux / Unix.
I have a server, which I use to monitoring traffic, the problem that I find is when I run the following command:


probe:~ # sar -n DEV 1


I see that I one second appear info in some interface and in the other second no appear, I don't know what will be the problem?


probe:~ # sar -n DEV 1
Linux 2.6.32.12-0.7-default (lav1) 01/16/2013 _x86_64_

03:13:14 AM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
03:13:15 AM lo 237.11 237.11 133.59 133.59 0.00 0.00 0.00
03:13:15 AM eth4 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth7 85488.66 0.00 54044.70 0.00 0.00 0.00 0.00
03:13:15 AM eth5 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth6 1.03 0.00 0.08 0.00 0.00 0.00 1.03
03:13:15 AM eth0 2.06 0.00 0.13 0.00 0.00 0.00 0.00
03:13:15 AM eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth2 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth3 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth0.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth0.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth1.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth1.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth2.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth2.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth3.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth3.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth4.2517 21923.71 0.00 3820.11 0.00 0.00 0.00 1.03
03:13:15 AM eth4.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth5.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth5.2518 3235.05 0.00 526.90 0.00 0.00 0.00 0.00
03:13:15 AM eth6.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:15 AM eth6.2518 1.03 0.00 0.07 0.00 0.00 0.00 1.03
03:13:15 AM eth7.2517 42420.62 0.00 26596.42 0.00 0.00 0.00 0.00
03:13:15 AM eth7.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00

03:13:15 AM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
03:13:16 AM lo 129.41 129.41 70.50 70.50 0.00 0.00 0.00
03:13:16 AM eth4 40502.94 0.00 7743.55 0.00 0.00 0.00 0.98
03:13:16 AM eth7 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth5 6229.41 0.00 1096.53 0.00 0.00 0.00 0.00
03:13:16 AM eth6 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth0 1.96 1.96 0.13 2.49 0.00 0.00 0.00
03:13:16 AM eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth2 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth3 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth0.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth0.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth1.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth1.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth2.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth2.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth3.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth3.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth4.2517 19767.65 0.00 3568.61 0.00 0.00 0.00 0.00
03:13:16 AM eth4.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth5.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth5.2518 3170.59 0.00 526.46 0.00 0.00 0.00 0.00
03:13:16 AM eth6.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth6.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:16 AM eth7.2517 39611.76 0.00 24385.15 0.00 0.00 0.00 0.00
03:13:16 AM eth7.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00

03:13:16 AM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
03:13:17 AM lo 6.00 6.00 0.82 0.82 0.00 0.00 0.00
03:13:17 AM eth4 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth7 81707.00 0.00 51731.79 0.00 0.00 0.00 0.00
03:13:17 AM eth5 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth6 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth0 2.00 2.00 0.13 2.54 0.00 0.00 0.00
03:13:17 AM eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth2 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth3 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth0.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth0.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth1.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth1.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth2.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth2.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth3.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth3.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth4.2517 20838.00 0.00 3690.83 0.00 0.00 0.00 0.00
03:13:17 AM eth4.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth5.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth5.2518 3331.00 0.00 549.41 0.00 0.00 0.00 0.00
03:13:17 AM eth6.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth6.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:17 AM eth7.2517 43083.00 0.00 27102.19 0.00 0.00 0.00 0.00
03:13:17 AM eth7.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00

03:13:17 AM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
03:13:18 AM lo 12.63 12.63 1.97 1.97 0.00 0.00 0.00
03:13:18 AM eth4 43789.47 0.00 8420.30 0.00 0.00 0.00 0.00
03:13:18 AM eth7 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth5 6922.11 0.00 1251.02 0.00 0.00 0.00 0.00
03:13:18 AM eth6 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth0 11.58 13.68 0.77 18.97 0.00 0.00 0.00
03:13:18 AM eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth2 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth3 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth0.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth0.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth1.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth1.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth2.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth2.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth3.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth3.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth4.2517 21937.89 0.00 3962.40 0.00 0.00 0.00 0.00
03:13:18 AM eth4.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth5.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth5.2518 3447.37 0.00 590.10 0.00 0.00 0.00 0.00
03:13:18 AM eth6.2517 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth6.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:13:18 AM eth7.2517 45248.42 0.00 28402.57 0.00 0.00 0.00 1.05
03:13:18 AM eth7.2518 0.00 0.00 0.00 0.00 0.00 0.00 0.00
^C
probe:~ #


As you can see the problem appear in the interface eth4, eth5 and eth7, in one second appear info and the other not

A Guru that can help please to identify what will be the problem?

I hope your suggestion/comments

Best Regards
Andres
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