Hierarchy

Tests for HTB class hierarchy: verifies parent-child structure, rate shaping through multiple nesting levels, and dynamic reconfiguration of parent relationships.

Test HTB Hierarchy

Description

Configures a three-level HTB hierarchy and verifies that all classes are present and the parent chain is correct: classes 3,4 under class 2; class 2 under class 1; class 1 at root level.

Scenario

Step 1: Set the following configuration in DUT0 :

set interfaces ethernet eth0 address 10.0.0.2/24
set interfaces ethernet eth0 traffic control out QDISC
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
set traffic control QDISC type htb bandwidth 100
set traffic control QDISC type htb class 1 bandwidth percentage 80
set traffic control QDISC type htb class 1 ceiling percentage 100
set traffic control QDISC type htb class 2 bandwidth rate 60
set traffic control QDISC type htb class 2 ceiling percentage 80
set traffic control QDISC type htb class 2 parent 1
set traffic control QDISC type htb class 3 bandwidth rate 30
set traffic control QDISC type htb class 3 parent 2
set traffic control QDISC type htb class 4 bandwidth rate 30
set traffic control QDISC type htb class 4 parent 2
set traffic control QDISC type htb class 5 bandwidth percentage 20
set traffic control QDISC type htb default-class 5
set traffic control QDISC type htb match 1 class 3
set traffic control QDISC type htb match 1 ip destination port 8080
set traffic control QDISC type htb match 1 ip protocol tcp
set traffic control QDISC type htb match 2 class 4
set traffic control QDISC type htb match 2 ip protocol tcp

Step 2: Set the following configuration in DUT1 :

set interfaces ethernet eth0 address 10.0.0.1/24
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 3: Ping the IP address 10.0.0.1 from DUT0:

admin@DUT0$ ping 10.0.0.1 count 1 size 56 timeout 1

Step 4: Run the command traffic control show on DUT0 and check whether the output contains the following tokens:

class 1
class 2
class 3
class 4
class 5 (default)

Step 5: Run the command traffic control show on DUT0 and check whether the output matches the following regular expressions:

class [34]\s+1:2
class 2\s+1:1
class 1\s+1:0

Test HTB Rate Shaping

Description

Configures a three-level HTB hierarchy (root -> class 1 -> class 2 -> classes 3,4) and verifies that TCP traffic on port 8080 is shaped to ~30 Mbps by class 3 and TCP traffic on any other port is shaped to ~30 Mbps by class 4. Counters are cleared between flows to confirm each class receives the expected traffic.

Scenario

Step 1: Set the following configuration in DUT0 :

set interfaces ethernet eth0 address 10.0.0.2/24
set interfaces ethernet eth0 traffic control out QDISC
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
set traffic control QDISC type htb bandwidth 100
set traffic control QDISC type htb class 1 bandwidth percentage 80
set traffic control QDISC type htb class 1 ceiling percentage 100
set traffic control QDISC type htb class 2 bandwidth rate 60
set traffic control QDISC type htb class 2 ceiling percentage 80
set traffic control QDISC type htb class 2 parent 1
set traffic control QDISC type htb class 3 bandwidth rate 30
set traffic control QDISC type htb class 3 parent 2
set traffic control QDISC type htb class 4 bandwidth rate 30
set traffic control QDISC type htb class 4 parent 2
set traffic control QDISC type htb class 5 bandwidth percentage 20
set traffic control QDISC type htb default-class 5
set traffic control QDISC type htb match 1 class 3
set traffic control QDISC type htb match 1 ip destination port 8080
set traffic control QDISC type htb match 1 ip protocol tcp
set traffic control QDISC type htb match 2 class 4
set traffic control QDISC type htb match 2 ip protocol tcp

Step 2: Set the following configuration in DUT1 :

set interfaces ethernet eth0 address 10.0.0.1/24
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 3: Ping the IP address 10.0.0.1 from DUT0:

admin@DUT0$ ping 10.0.0.1 count 1 size 56 timeout 1

Step 4: Initiate a bandwidth test from DUT0 to DUT1

admin@DUT1$ monitor test performance server port 8080
admin@DUT0$ monitor test performance client 10.0.0.1 duration 5 port 8080 parallel 1

Step 5: Run the command traffic control show on DUT0 and check whether the output matches the following regular expressions:

class 3\s+1:2\s+[1-9]

Note

Run traffic control clear at DUT0 to reset counters before the next flow.

Step 6: Initiate a bandwidth test from DUT0 to DUT1

admin@DUT1$ monitor test performance server port 1234
admin@DUT0$ monitor test performance client 10.0.0.1 duration 5 port 1234 parallel 1

Step 7: Run the command traffic control show on DUT0 and check whether the output matches the following regular expressions:

class 4\s+1:2\s+[1-9]

Test HTB Dynamic Reconfiguration

Description

Verifies that the parent of an existing class can be changed dynamically. Starting from the two-level hierarchy, class 5 is moved from parent 4 to parent 1. After the change, class 5 must appear under parent 1:1 instead of 1:4.

Scenario

Step 1: Set the following configuration in DUT0 :

set interfaces ethernet eth0 address 10.0.0.2/24
set interfaces ethernet eth0 traffic control out QDISC
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
set traffic control QDISC type htb bandwidth 100
set traffic control QDISC type htb class 1 bandwidth percentage 40
set traffic control QDISC type htb class 4 bandwidth percentage 30
set traffic control QDISC type htb class 5 bandwidth rate 20
set traffic control QDISC type htb class 5 parent 4
set traffic control QDISC type htb class 6 bandwidth percentage 10
set traffic control QDISC type htb default-class 6

Step 2: Set the following configuration in DUT1 :

set interfaces ethernet eth0 address 10.0.0.1/24
set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'

Step 3: Ping the IP address 10.0.0.1 from DUT0:

admin@DUT0$ ping 10.0.0.1 count 1 size 56 timeout 1

Step 4: Run the command traffic control show on DUT0 and check whether the output matches the following regular expressions:

class 5\s+1:4

Step 5: Modify the following configuration lines in DUT0 :

set traffic control QDISC type htb class 5 parent 1

Step 6: Run the command traffic control show on DUT0 and check whether the output matches the following regular expressions:

class 5\s+1:1