Netem failure on router

[ThatOneGuy]

Hey! Complete openWRT newbie here and I am struggling to get netem to function the way I need it to. I’m trying to adjust the entire router’s internet connection to make every device on the network experience a delay of 100ms.

So I ssh into the router and do:
tc qdisc add dev eth0 root netem delay 100ms

And it fails with ‘Error: specified qdisc kind is unknown’

Which is very strange because when I do:
tc qdisc show dev eth0

It shows me:
qdisc fq_codel 0: root refcnt 2 limit 10240p flows 1024 quantum 1518 target 5ms interval 100ms memory_limit 4Mb ecn drop_batch 64

Which looks like it should take the add command from tc qdisc, right?

Btw I flashed the router with the base image. Did not flash to the upgrade build.

Any ideas on what could be wrong here???

[dave14305]

You need to specify the netem qdisc and related parameters in the add command.

Have you already installed the kmod-netem package?

[ThatOneGuy]

Oh. Isn't that what the add command I have in the exmaple doing? Am I misunderstanding something?

tc qdisc add dev eth0 root
then
netem (the tool I want to use)
delay 100ms (the option from the help menu along with a value in ms)

AND WOW!
After I downloaded the package you mentioned... the command I have for hitting eth0 and adding that delay with netem worked! Now it's showing my changes! Strange that I can only have one rule at a time.. but I can work with that.

root@OpenWrt:~# tc qdisc add dev eth0 root netem delay 345ms
root@OpenWrt:~# tc qdisc show
qdisc noqueue 0: dev lo root refcnt 2
qdisc netem 8002: dev eth0 root refcnt 2 limit 1000 delay 345ms

THANK YOU SO MUCH!