Happy Friday everyone!
The other day I was working with a new customer getting NetFlow export enabled on his Cisco 3800 routers. When I was explaining the concept of using the ip flow ingress command in enabling NetFlow per interface, he said:
“I have to do that on all my interfaces?!? I have like ten sub-interfaces to do.”
In reality, ten interfaces isn’t really hard to configure, but it can be… cumbersome.
So if you are enabling NetFlow on a device with LOTS of vlans, a nice quick way to get things up and running is to use the int range command.
You can do this by typing the following:
#: int range
For example, yesterday he was trying to enable ip flow ingress on a range of subinterfaces. So we used the following:
#: int range eth0/1.160 – eth0/1.300
Once you specify your interface range, you’ll get the following prompt:
#int range eth0/1.160-eth0/1.300>
From there, just enter the command you want to apply across all interfaces. In our case: ip flow ingress
There. You just saved about one minute of your life that you can devote to something else.