Default Settings for CoPP

Owned by Tracy Yang
Nov 18, 2024
23 min read

 

NOTE:

  • Default settings for CoPP in this page applies for all the PicOS supported switches except N2224PX-ON/N2248X-ON/N3208PX-ON.

  • CoPP configures control policy of the traffic from the ASIC to CPU. It is a very sensitive process of the whole switch OS. Any incorrect setting could impact the stability or could even paralyze the normal network operation. It is therefore highly recommended to KEEP the default configurations of CoPP to ensure the system and network stability.

 

Default Queue Mapping Policy

By default, CoPP provides 27 CPU queues for data forwarding that would have a default scheduling weight. The system pre-defines 16 types of control plane protocols mapping from queue 8 to 26. The default queue mapping policy is as follows.

Table 1. Default Queue Mapping Policy

Protocols

CPU Queue

Default Scheduling Weight

MPLS LDP

29

16

IS-IS

28

16

Loopback Detection

27

32

RIPng

26

16

ERPS

25

32

MVRP

24

32

SSH/SNMP/NTP/TACACS/RADIUS

23

12

BPDU

22

32

LACP

21

32

LLDP

20

32

ARP

19

32

NDP

18

32

BFD

17

16

MLAG

16

16

MLAG-MAC-SYNC

15

16

BGP

14

16

OSPF

13

16

RIP

12

16

DHCP/DHCPv6

11

16

VRRP

10

16

IGMP

9

16

PIM

8

16

Reserved

7

-

Reserved

6

-

Reserved

5

-

Reserved

4

-

Reserved

3

-

Reserved

2

-

Reserved

1

-

Default*

0

0

Reserved: Reserved CPU queues indicate the CPU queues that have not been used by the system pre-defined queue mapping settings. For user-defined CoPP policy, it is recommended to use the reserved queues for queue mapping settings. 

Default*: The flow of traffic directed to switch CPU will be sent to CPU queue 0 when the traffic matches no firewall filter rule.

But for the packet with an Inet Precedence or DSCP value, it will not always be sent to CPU queue 0 when the traffic matches no firewall filter rule. When you configure the classifier to classify services on different inbound interfaces by using set class-of-service classifier trust-mode dscp and set class-of-service interface classifier commands. The packets will be sent to the CPU queue according to the Inet Precedence or DSCP value. Mappings from Inet Precedence/DSCP value to CPU Queue are shown in the following tables.

Table 2. Mapping from Inet Precedence value to CPU Queue

Inet-precedence

CPU Queue

0

0

1

1

2

2

3

3

4

4

5

5

6

6

7

7

 

Table 3. Mapping from DSCP value to CPU Queue

DSCP

CPU Queue

0,1,2,3,4,5,6,7

0

8,9,10,11,12,13,14,15

1

16,17,18,19,20,21,22,23

2

24,25,26,27,28,29,30,31

3

32,33,34,35,36,37,38,39

4

40,41,42,43,44,45,46,47

5

48,49,50,51,52,53,54,55

6

56,57,58,59,60,61,62,63

7


Default CLI Settings

PicOS will startup with the following CLI commands by default. Users can change the pre-defined CoPP policies but are NOT allowed to delete them.

NOTE: The values of min-bandwidth-pps and max-bandwidth-pps are different on different platforms.

# Default configurations of forwarding class for CoPP.

set class-of-service forwarding-class ldp-class local-priority 29 set class-of-service forwarding-class isis-class local-priority 28 set class-of-service forwarding-class loopback-detection-class local-priority 27 set class-of-service forwarding-class ripng-class local-priority 26 set class-of-service forwarding-class erps-class local-priority 25 set class-of-service forwarding-class mvrp-class local-priority 24 set class-of-service forwarding-class management-class local-priority 23 set class-of-service forwarding-class bpdu-class local-priority 22 set class-of-service forwarding-class lacp-class local-priority 21 set class-of-service forwarding-class lldp-class local-priority 20 set class-of-service forwarding-class arp-class local-priority 19 set class-of-service forwarding-class ndp-class local-priority 18 set class-of-service forwarding-class bfd-class local-priority 17 set class-of-service forwarding-class mlag-class local-priority 16 set class-of-service forwarding-class mlag-mac-sync-class local-priority 15 set class-of-service forwarding-class bgp-class local-priority 14 set class-of-service forwarding-class ospf-class local-priority 13 set class-of-service forwarding-class rip-class local-priority 12 set class-of-service forwarding-class dhcp-class local-priority 11 set class-of-service forwarding-class vrrp-class local-priority 10 set class-of-service forwarding-class igmp-class local-priority 9 set class-of-service forwarding-class pim-class local-priority 8 set class-of-service forwarding-class default-class local-priority 0

 

# Default configurations of schedulers for CoPP.

set class-of-service scheduler ldp-scheduler mode WRR set class-of-service scheduler ldp-scheduler weight 16 set class-of-service scheduler ldp-scheduler max-bandwidth-pps 80 set class-of-service scheduler ldp-scheduler min-bandwidth-pps 20 set class-of-service scheduler isis-scheduler mode WRR set class-of-service scheduler isis-scheduler weight 16 set class-of-service scheduler isis-scheduler max-bandwidth-pps 80 set class-of-service scheduler isis-scheduler min-bandwidth-pps 20 set class-of-service scheduler loopback-detection-scheduler mode WRR set class-of-service scheduler loopback-detection-scheduler weight 32 set class-of-service scheduler loopback-detection-scheduler max-bandwidth-pps 80 set class-of-service scheduler loopback-detection-scheduler min-bandwidth-pps 20 set class-of-service scheduler ripng-scheduler mode WRR set class-of-service scheduler ripng-scheduler weight 16 set class-of-service scheduler ripng-scheduler max-bandwidth-pps 80 set class-of-service scheduler ripng-scheduler min-bandwidth-pps 0 set class-of-service scheduler erps-scheduler mode WRR set class-of-service scheduler erps-scheduler weight 32 set class-of-service scheduler erps-scheduler max-bandwidth-pps 80 set class-of-service scheduler erps-scheduler min-bandwidth-pps 20 set class-of-service scheduler mvrp-scheduler mode WRR set class-of-service scheduler mvrp-scheduler weight 32 set class-of-service scheduler mvrp-scheduler max-bandwidth-pps 80 set class-of-service scheduler mvrp-scheduler min-bandwidth-pps 20 set class-of-service scheduler management-scheduler mode WRR set class-of-service scheduler management-scheduler weight 12 set class-of-service scheduler management-scheduler max-bandwidth-pps 80 set class-of-service scheduler management-scheduler min-bandwidth-pps 0 set class-of-service scheduler arp-scheduler mode WRR set class-of-service scheduler arp-scheduler weight 32 set class-of-service scheduler arp-scheduler max-bandwidth-pps 80 set class-of-service scheduler arp-scheduler min-bandwidth-pps 0 set class-of-service scheduler ndp-scheduler mode WRR set class-of-service scheduler ndp-scheduler weight 32 set class-of-service scheduler ndp-scheduler max-bandwidth-pps 80 set class-of-service scheduler ndp-scheduler min-bandwidth-pps 0 set class-of-service scheduler bfd-scheduler mode WRR set class-of-service scheduler bfd-scheduler weight 16 set class-of-service scheduler bfd-scheduler max-bandwidth-pps 80 set class-of-service scheduler bfd-scheduler min-bandwidth-pps 20 set class-of-service scheduler mlag-scheduler mode WRR set class-of-service scheduler mlag-scheduler weight 16 set class-of-service scheduler mlag-scheduler max-bandwidth-pps 80 set class-of-service scheduler mlag-scheduler min-bandwidth-pps 20   set class-of-service scheduler mlag-mac-sync-scheduler mode WRR set class-of-service scheduler mlag-mac-sync-scheduler weight 16 set class-of-service scheduler mlag-mac-sync-scheduler max-bandwidth-pps 80 set class-of-service scheduler mlag-mac-sync-scheduler min-bandwidth-pps 20 set class-of-service scheduler bgp-scheduler mode WRR set class-of-service scheduler bgp-scheduler weight 16 set class-of-service scheduler bgp-scheduler max-bandwidth-pps 80 set class-of-service scheduler bgp-scheduler min-bandwidth-pps 20 set class-of-service scheduler ospf-scheduler mode WRR set class-of-service scheduler ospf-scheduler weight 16 set class-of-service scheduler ospf-scheduler max-bandwidth-pps 80 set class-of-service scheduler ospf-scheduler min-bandwidth-pps 20 set class-of-service scheduler rip-scheduler mode WRR set class-of-service scheduler rip-scheduler weight 16 set class-of-service scheduler rip-scheduler max-bandwidth-pps 80 set class-of-service scheduler rip-scheduler min-bandwidth-pps 20 set class-of-service scheduler dhcp-scheduler mode WRR set class-of-service scheduler dhcp-scheduler weight 16 set class-of-service scheduler dhcp-scheduler max-bandwidth-pps 80 set class-of-service scheduler dhcp-scheduler min-bandwidth-pps 20 set class-of-service scheduler vrrp-scheduler mode WRR set class-of-service scheduler vrrp-scheduler weight 16 set class-of-service scheduler vrrp-scheduler max-bandwidth-pps 80 set class-of-service scheduler vrrp-scheduler min-bandwidth-pps 20 set class-of-service scheduler igmp-scheduler mode WRR set class-of-service scheduler igmp-scheduler weight 16 set class-of-service scheduler igmp-scheduler max-bandwidth-pps 80 set class-of-service scheduler igmp-scheduler min-bandwidth-pps 20 set class-of-service scheduler pim-scheduler mode WRR set class-of-service scheduler pim-scheduler weight 16 set class-of-service scheduler pim-scheduler max-bandwidth-pps 80 set class-of-service scheduler pim-scheduler min-bandwidth-pps 20 set class-of-service scheduler bpdu-scheduler mode WRR set class-of-service scheduler bpdu-scheduler weight 32 set class-of-service scheduler bpdu-scheduler max-bandwidth-pps 80 set class-of-service scheduler bpdu-scheduler min-bandwidth-pps 20 set class-of-service scheduler lacp-scheduler mode WRR set class-of-service scheduler lacp-scheduler weight 32 set class-of-service scheduler lacp-scheduler max-bandwidth-pps 80 set class-of-service scheduler lacp-scheduler min-bandwidth-pps 20 set class-of-service scheduler lldp-scheduler mode WRR set class-of-service scheduler lldp-scheduler weight 32 set class-of-service scheduler lldp-scheduler max-bandwidth-pps 80 set class-of-service scheduler lldp-scheduler min-bandwidth-pps 20  set class-of-service scheduler default-scheduler mode WRR set class-of-service scheduler default-scheduler weight 8 set class-of-service scheduler default-scheduler max-bandwidth-pps 80 set class-of-service scheduler default-scheduler min-bandwidth-pps 0 set class-of-service scheduler-profile copp-profile forwarding-class ldp-class scheduler ldp-scheduler set class-of-service scheduler-profile copp-profile forwarding-class isis-class scheduler isis-scheduler set class-of-service scheduler-profile copp-profile forwarding-class loopback-detection-class scheduler loopback-detection-scheduler set class-of-service scheduler-profile copp-profile forwarding-class ripng-class scheduler ripng-scheduler set class-of-service scheduler-profile copp-profile forwarding-class erps-class scheduler erps-scheduler set class-of-service scheduler-profile copp-profile forwarding-class mvrp-class scheduler mvrp-scheduler set class-of-service scheduler-profile copp-profile forwarding-class management-class scheduler management-scheduler set class-of-service scheduler-profile copp-profile forwarding-class bpdu-class scheduler bpdu-scheduler set class-of-service scheduler-profile copp-profile forwarding-class lacp-class scheduler lacp-scheduler set class-of-service scheduler-profile copp-profile forwarding-class lldp-class scheduler lldp-scheduler set class-of-service scheduler-profile copp-profile forwarding-class bfd-class scheduler bfd-scheduler set class-of-service scheduler-profile copp-profile forwarding-class mlag-class scheduler mlag-scheduler set class-of-service scheduler-profile copp-profile forwarding-class mlag-mac-sync-class scheduler mlag-mac-sync-scheduler set class-of-service scheduler-profile copp-profile forwarding-class bgp-class scheduler bgp-scheduler set class-of-service scheduler-profile copp-profile forwarding-class ospf-class scheduler ospf-scheduler set class-of-service scheduler-profile copp-profile forwarding-class rip-class scheduler rip-scheduler set class-of-service scheduler-profile copp-profile forwarding-class dhcp-class scheduler dhcp-scheduler set class-of-service scheduler-profile copp-profile forwarding-class vrrp-class scheduler vrrp-scheduler set class-of-service scheduler-profile copp-profile forwarding-class igmp-class scheduler igmp-scheduler set class-of-service scheduler-profile copp-profile forwarding-class pim-class scheduler pim-scheduler set class-of-service scheduler-profile copp-profile forwarding-class arp-class scheduler arp-scheduler set class-of-service scheduler-profile copp-profile forwarding-class ndp-class scheduler ndp-scheduler set class-of-service scheduler-profile copp-profile forwarding-class default-class scheduler default-scheduler

 

# Apply schedulers of CoPP to inbound interface.

set class-of-service interface inbound-control-plane scheduler-profile copp-profile

 

# Default configurations of protocol sequences and forwarding class.

 

#Apply firewall filter of CoPP to inbound interface.

 

Show Default Settings of CoPP

  • You can use run show copp bandwidth, run show class-of-service interface inbound-control-plane and run show filter copp commands to view the default settings. (Besides default settings, the commands will also show the COPP configurations made by the user.) 

 

 

 

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