[Solved] Cake diffserv3 call tins

warchief · September 1, 2019, 11:19pm

Okay hello I am attempting to move from diffserv8 to diffserv3 to simplify my ruleset. I do not know how to call the class using iptables. The only examples I have found are tctables and I am not using tcables i'm using iptables. I want to set all eth traffic in Default(CS0) and all traffic on a given IP Latency Sensitive(CS6).

iptables -t mangle -A FORWARD -I eth+ -j DSCP --set-dscp-class CS0
iptables -t mangle -A FORWARD -src 192.1.1.1 -j DSCP --set-dscp-class CS6

Am I calling these correctly - also, what are the classes?

Low Priority = CS1?
Best Effort= CS0?
Latency Sensitive = CS6?

yousong · September 2, 2019, 6:21am

From the code,

github.com

torvalds/linux/blob/9f159ae07f07fc540290f21937231034f554bdd7/net/sched/sch_cake.c#L2431-L2437


static int cake_config_diffserv3(struct Qdisc *sch)
{
/*  Simplified Diffserv structure with 3 tins.
 *		Low Priority		(CS1)
 *		Best Effort
 *		Latency Sensitive	(TOS4, VA, EF, CS6, CS7)
 */

github.com

torvalds/linux/blob/9f159ae07f07fc540290f21937231034f554bdd7/net/sched/sch_cake.c#L337-L346


static const u8 diffserv3[] = {
	0, 0, 0, 0, 2, 0, 0, 0,
	1, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 2, 0, 2, 0,
	2, 0, 0, 0, 0, 0, 0, 0,
	2, 0, 0, 0, 0, 0, 0, 0,
};

system · November 28, 2019, 11:28pm

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