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Port Utilization -- Cat OS

Unanswered Question
Aug 7th, 2006
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Hi,


I would like to know the command for checking the BW utilization of a DS3 link which is terminating on a Catalyst switch port. For this link we have configured the IP and others in MSFC through a VLAN inteface. But sh int vlan "#" is not giving the accurate utilization. I tried sh port , sh counters, sh mac etc.. all these commands in Cat. But still i am not getting the accurate utilization output like " last 5 min input rate #### " on a native OS.


Jaison

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jackyoung Tue, 08/08/2006 - 00:54
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Yes, you cannot get the real utilization via the router/switch interface. You can deploy an external monitoring system, e.g. MRTG/PRTG to monitor the utilization. However, we normally monitor the port at interval and according to the history to determine the rate.


Or you may connect to a Sniffer to monitor the utilization. But it is costly.

antonyjaison Wed, 08/09/2006 - 00:15
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Hi Jack,


Thanks for ur reply. I may get the utilization graph if i connect the monitoring system. But i wanted to know only that time utilization only. ie.. if i give "sh int f0/0" on Cisco IOS i can see the utilization at below portion..


"5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec"


The same way i wants to see the utization on CatOS. I tried with "sh top " command and its giving a combined output of tx and rx . I wants to monitor individualy(tx or rx) . Any idea how it can be possible in CatOS.


Jaison

jackyoung Wed, 08/09/2006 - 00:49
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You're welcome. I believe there is no way to monitor the snapshot throughput of the switch port unless you an external device to monitor it (e.g. Sniffer).


Or cannot check the throughput from remote end ?





antonyjaison Wed, 08/09/2006 - 01:32
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Hi Jack,

I cannot check from remote end also since my both (A & B)ends are terminating on ethernet(running CatOS on both side).


Jaison

antonyjaison Wed, 08/09/2006 - 03:33
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hi Jack,


Finally we enabled the ports in NMS tool and monitoring through that.


Thanks,

Jaison

jackyoung Wed, 08/09/2006 - 16:32
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Thanks for your update. DO you mean your NMS tool can monitor the link at real time ? Or poll it regulatorly ?

jackyoung Wed, 08/09/2006 - 19:54
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So it is not real-time. However, it tells you the trend and history of the usage.

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