Default Settings for CoPP

Owned by Tracy Yang (Unlicensed)
Apr 26, 2023
13 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 24 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 23. The default queue mapping policy is as follows.

Table 1. Default Queue Mapping Policy

Protocols

CPU Queue

Default Scheduling Weight

SSH/TELNET/SNMP

23

32

BPDU

22

32

LACP

21

32

LLDP

20

32

ARP

19

32

NDP1832

BFD

17

16

MLAG

16

16

MLAG-MAC-SYNC

15

16

BGP

14

16

OSPF

13

16

RIP

12

16

DHCP

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 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 management-scheduler mode WRR
set class-of-service scheduler management-scheduler weight 32
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 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.

set firewall filter copp sequence 10 from protocol bpdu
set firewall filter copp sequence 10 then forwarding-class bpdu-class
set firewall filter copp sequence 20 from protocol lacp
set firewall filter copp sequence 20 then forwarding-class lacp-class
set firewall filter copp sequence 30 from protocol lldp
set firewall filter copp sequence 30 then forwarding-class lldp-class
set firewall filter copp sequence 40 from protocol arp
set firewall filter copp sequence 40 then forwarding-class arp-class
set firewall filter copp sequence 50 from protocol ndp
set firewall filter copp sequence 50 then forwarding-class ndp-class
set firewall filter copp sequence 60 from protocol bfd
set firewall filter copp sequence 60 then forwarding-class bfd-class
set firewall filter copp sequence 70 from protocol mlag  
set firewall filter copp sequence 70 then forwarding-class mlag-class
set firewall filter copp sequence 80 from protocol mlag-mac-sync 
set firewall filter copp sequence 80 then forwarding-class mlag-mac-sync-class
set firewall filter copp sequence 90 from protocol bgp
set firewall filter copp sequence 90 then forwarding-class bgp-class
set firewall filter copp sequence 100 from protocol ospf
set firewall filter copp sequence 100 then forwarding-class ospf-class
set firewall filter copp sequence 110 from protocol rip
set firewall filter copp sequence 110 then forwarding-class rip-class
set firewall filter copp sequence 120 from protocol dhcp
set firewall filter copp sequence 120 then forwarding-class dhcp-class
set firewall filter copp sequence 130 from protocol vrrp
set firewall filter copp sequence 130 then forwarding-class vrrp-class
set firewall filter copp sequence 140 from protocol igmp
set firewall filter copp sequence 140 then forwarding-class igmp-class
set firewall filter copp sequence 150 from protocol pim
set firewall filter copp sequence 150 then forwarding-class pim-class
set firewall filter copp sequence 160 from protocol ssh
set firewall filter copp sequence 160 then forwarding-class management-class
set firewall filter copp sequence 170 from protocol telnet
set firewall filter copp sequence 170 then forwarding-class management-class
set firewall filter copp sequence 180 from protocol snmp
set firewall filter copp sequence 180 then forwarding-class management-class


#Apply firewall filter of CoPP to inbound interface.

set firewall filter copp input interface inbound-control-plane


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.) 
admin@Xorplus# run show copp bandwidth
Forwarding Class  Min-Bandwidth Max-Bandwidth Weight Local-Priority Schedule-Mode
default-class        0            80           8      0              WRR               
pim-class            0            80           16     8              WRR         
igmp-class           0            80           16     9              WRR         
vrrp-class           0            80           16     10             WRR         
dhcp-class           0            80           16     11             WRR         
rip-class            0            80           16     12             WRR         
ospf-class           0            80           16     13             WRR         
bgp-class            0            80           16     14             WRR         
mlag-mac-sync-class  0            80           16     15             WRR 
mlag-class           0            80           16     16             WRR         
bfd-class            0            80           16     17             WRR         
arp-class            20           80           32     18             WRR   
arp-class            20           80           32     19             WRR   
lldp-class           20           80           32     20             WRR         
lacp-class           20           80           32     21             WRR         
bpdu-class           20           80           32     22             WRR
management-class     20           80           32     23             WRR      


admin@XorPlus#  run show filter copp
Filter: copp
    Description:
    Sequence: 10
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 bpdu
        action: forward
        forwarding_class: bpdu-class
    Sequence: 20
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 lacp
        action: forward
        forwarding_class: lacp-class
    Sequence: 30
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 lldp
        action: forward
        forwarding_class: lldp-class
    Sequence: 40
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 arp
        action: forward
        forwarding_class: arp-class
    Sequence: 50
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 ndp
        action: forward
        forwarding_class: ndp-class
    Sequence: 60
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 bfd
        action: forward
        forwarding_class: bfd-class
    Sequence: 70
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 mlag
        action: forward
        forwarding_class: mlag-class
    Sequence: 80
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 mlag-mac-sync
        action: forward
        forwarding_class: mlag-mac-sync-class
    Sequence: 90
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 bgp
        action: forward
        forwarding_class: bgp-class
    Sequence: 100
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 ospf
        action: forward
        forwarding_class: ospf-class
    Sequence: 110
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 rip
        action: forward
        forwarding_class: rip-class
    Sequence: 120
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 dhcp
        action: forward
        forwarding_class: dhcp-class
    Sequence: 130
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 vrrp
        action: forward
        forwarding_class: vrrp-class
    Sequence: 140
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 igmp
        action: forward
        forwarding_class: igmp-class
    Sequence: 150
        Description:
        match counter:  0 packets
        match-condition:
            protocol:                 pim
        action: forward
        forwarding_class: pim-class
    Sequence: 160
        Description: 
        match counter:  0 packets
        match-condition:
            protocol:                 ssh
        action: forward
        forwarding_class: management-class
    Sequence: 170
        Description: 
        match counter:  0 packets
        match-condition:
            protocol:                 telnet
        action: forward
        forwarding_class: management-class
    Sequence: 180
        Description: 
        match counter:  0 packets
        match-condition:
            protocol:                 snmp
        action: forward
        forwarding_class: management-class
    Input interface: inbound-control-plane
admin@Xorplus# run show class-of-service interface inbound-control-plane 
Interface : inbound-control-plane
Scheduler-profile : copp-profile
Forwarding-class     Local-priority   Scheduler               Min-Bandwidth   Max-Bandwidth   Weight   Schedule-Mode
------------------   --------------   ---------------------   -------------   -------------   ------   -------------
default-class        0                default-scheduler       0               80              8        WRR          
pim-class            8                pim-scheduler           0               80              16       WRR          
igmp-class           9                igmp-scheduler          0               80              16       WRR          
vrrp-class           10               vrrp-scheduler          0               80              16       WRR          
dhcp-class           11               dhcp-scheduler          0               80              16       WRR          
rip-class            12               rip-scheduler           0               80              16       WRR          
ospf-class           13               ospf-scheduler          0               80              16       WRR          
bgp-class            14               bgp-scheduler           0               80              16       WRR          
mlag-mac-sync-class  15               mlag-mac-sync-scheduler 0               80              16       WRR          
mlag-class           16               mlag-scheduler          0               80              16       WRR          
bfd-class            17               bfd-scheduler           0               80              16       WRR 
ndp-class            18               arp-scheduler           20              80              32       WRR                   
arp-class            19               arp-scheduler           20              80              32       WRR          
lldp-class           20               lldp-scheduler          20              80              32       WRR          
lacp-class           21               lacp-scheduler          20              80              32       WRR          
bpdu-class           22               bpdu-scheduler          20              80              32       WRR
management-class     23               management-scheduler    20              80              32       WRR

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