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--- mywiki:linux:tc-ca [2025/08/29 11:54] – gshao
+++ mywiki:linux:tc-ca [2025/08/29 16:35] (current) – [Example to create below queue structures] gshao
@@ Line 1: / Line 1: @@
+====== Difference between ingress/egress qdisc ======
 | Feature | Ingress Qdisc | egress Qdisc |
 | Direction | Incoming traffic | Outgoing traffic |
@@ Line 15: / Line 18: @@
   * **htb** is a **hierarchical** token bucket used for shaping.
   * **flowid** assigns traffic to **a specific class**.
+  * **tc class** is only for egress qdisc, not ingress qdisc
+  * **lowid :1** in this ingress command is a label or tag used for accounting and statistics: tc filter add dev <interface> parent ffff: protocol ip prio 1 u32 match ip src 0.0.0.0/0 police rate 1mbit burst 10k drop **flowid :1**
-Example to create below queue structures:
+====== Example to create below queue structures ======
 <code>
 Queue 1 ─┐
@@ Line 25: / Line 32: @@
 Queue 4 ─┘→ Scheduler 3 → Scheduler 4 → Root Egress Qdisc (eth1)
 </code>
+Note:
+  * use **tc class** to create queue/scheduler structure
+  * use **tc filter** to map traffic to queue
 <code bash t.sh>
@@ Line 63: / Line 74: @@
     match ip src 192.168.1.4/32 flowid 1:212
 </code>
+Delete filter example:
+  * filter del dev eth1 protocol ip parent 1: prio 1
+Delete class example:
+  * tc class del dev eth1 classid 1:111  # Queue 1
+  * tc class del dev eth1 classid 1:112  # Queue 2
+  * tc class del dev eth1 classid 1:211  # Queue 3
+  * tc class del dev eth1 classid 1:212  # Queue 4
+  * tc class del dev eth1 classid 1:11   # Scheduler 1
+  * tc class del dev eth1 classid 1:21   # Scheduler 3
+  * tc class del dev eth1 classid 1:10   # Scheduler 2
+  * tc class del dev eth1 classid 1:20   # Scheduler 4
+Delete qdisc example:
+  * tc qdisc del dev eth1 root
+====== example to create multiple chains in the ingress qdisc ======
+====== example to create multiple chains in the egress qdisc ======