Update PPPOE_shaper.md

PPPOE_shaper.md

@@ -196,6 +196,24 @@ traffic is being "buffered", so user use all speed for this class.<br>
 If counter in dropped is not zero, it means that user is sending more traffic than allowed by class and packets are dropped.<br>
 And sure you can match rate and ceil, which match cir and burst values.<br>
 
+# burst2d /etc/burst2d.cfg 
+
+This is burst daemon system settings file.
+Available options:
+```
+[global]
+static_config=/etc/config.json
+#tc=/usr/local/sbin/tc
+htb_extra=burst 4000000 cburst 4000000
+upload_shaper=0
+filter_swap=0
+```
+- static_config - path to config.json, where shaper definitions are done.
+- tc - optional, used in case we need to use different version of tc
+- htb_extra - extra options for HTB, for example to set microburst values to reduce CPU load
+- upload_shaper if set to 0 - upload shaper is disabled, 1 - enabled
+- filter_swap - swap how Radius speed attributes identified. Values 0 or 1. If you see download speed incorrectly set as upload (and upload as download), change variable to opposite
+
 # burst2d config.json options
 
 ## Example config.json