Andy Furniss wrote:
Jonathan Morton wrote:
On 26 Feb, 2017, at 15:41, Andy Furniss <adf.li...@gmail.com> wrote:
This works in the sense that I can now get tcpdump on a PC on the
lan to show incoming icmp with tos 0xb8.
So I try to add cake under dsmark ini the hope that it sees icmp as ef
but it doesn't, icmp goes to best effort.
I suspect packets are queuing in cake first and only then going
through dsmark. What happens if you reverse the nesting?
tc qdisc add dev ifb0 handle 1:0 root cake bandwidth 60mbit raw overhead
34 diffserv4
tc qdisc add dev ifb0 handle 2:0 parent 1:0 dsmark indices 64
RTNETLINK answers: Operation not supported
Going to be AFK till this evening - will try more random stuff later.
I couldn't get anything to work with dsmark so went for plan B =
Use tc pedit which has a selector for dscp. Turned out to be useless
though, it looked like it overwrote the whole tos byte, but worse I
ended up with packets that failed csum so got dropped.
Plan C worked :-) = use action ipt, which is now action xt (ugh).
tc filter add dev ppp0 parent ffff: prio 1 protocol ip u32 match ip
protocol 1 0xff action xt -j DSCP --set-dscp-class ef action mirred
egress redirect dev ifb0
...other filters ...
TODO see if it's possible with actions to set dscp when using connmark to
choose the flow.
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