I have an ISP modem running in bridge mode. I am using OpenWrt on Linksys ea7500 v2 connected to the isp modem via ethernet. Two VLANs are entering, one for the internet and the other for IPTV. I have filtered them and PPPOE is connected to the internet, while one port of the router is in bridge with wan to get untagged traffic of IPTV VLAN, because the IPTV box doesn't understand VLANs. What is the best MTU size for the internet interface? what should i put in the SQM link layer adaptation tab?
