03-18-2011 01:45 PM - edited 03-04-2019 11:48 AM
Is there a good step-by-step process for me to check/monitor the bandwidth utilization of a particular serial interface (i.e., WAN link) on our router or firewall? I would like check without using any third-party tool - just the command line.
Thank you,
Thomas
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03-18-2011 02:42 PM
Hi Thomas,
You can simply use the show interface <interface_type> command line , and reference the reliability output of the given interface, you will see it as a fraction of 255/255 which means %100 realiable .
For example a txload/rxload 100/255 off a T1 you can say the link is %50 utlilized , same principle for a 100 MB ethernet link , same applies for the firewall interfaces or any other Cisco devices with interfaces etc..
There are few free third party software out there you could use to collect this information in a more grafical way as suppose constantly checking all devices by command line ..
Regards
03-18-2011 02:42 PM
Hi Thomas,
You can simply use the show interface <interface_type> command line , and reference the reliability output of the given interface, you will see it as a fraction of 255/255 which means %100 realiable .
For example a txload/rxload 100/255 off a T1 you can say the link is %50 utlilized , same principle for a 100 MB ethernet link , same applies for the firewall interfaces or any other Cisco devices with interfaces etc..
There are few free third party software out there you could use to collect this information in a more grafical way as suppose constantly checking all devices by command line ..
Regards
03-19-2011 07:14 AM
As Jorge stated, the show interface serial x will provide the info you are after but make sure to change the load interval to 30 seconds from the default 5 minutes. The command is load-interval 30 under the serial interface.
03-19-2011 08:18 AM
Thank you Jorge and Edison!
Thomas
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