matthew/sonic-buildimage
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

DNX(J2/J2c/J2c+): Reserve Non-ECMP Fec Resource for Non-ECMP Route Nexthops/NBR Entries (#13076)

Browse Source 
Why I did it
On DNX (J2/J2c/J2c+) platforms, Single Path Nexthops and ECMp Nexthop resources(FECs) are shared. BRCM SAI do not have partition of this resource, and hence more single path Nexthop entries, causes ECMP programming to fail in scaled setup.

How I did it
Broadcom provided SAI changes to reserve resources for single path nexthop entries(More details in CSP: https://brcmsemiconductor-csm.wolkenservicedesk.com/wolken-support/allcases/request-details?requestId=CS00012251649).
Along with SAI changes, they provided configurable Macro/flag to reserve NON_ECMP entries.
This PR is to add that flag in various sai.profile files wherever applicable.

PS: We are reserving 3072 single path Nexthop entries on each Linecard. Calculation is as follows.
Max Slots per chassis: 8
Max No of Ports(each LC): 64
MyIP/Subnet Entries per port: 4(v4/v6)
Nbr Entries Per port: 2(v4/v6)

Total Non_ECMP Count: 8x64x(4+2) = 3072

How to verify it
Without this change, the ECMP group count will be shown as Max_count in 'crm show resources all' command, and with this change the ECMP group count will be decreased by 24(3072/128).
This commit is contained in:
Deepak Singhal 2022-12-16 16:43:43 -08:00 committed by GitHub
parent 1fd2395f29
commit bf428fd9a7
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 8 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
device/arista/x86_64-arista_7800r3_48cq2_lc/Arista-7800R3-48CQ2-C48/sai.profile
View File

@ -1 +1,2 @@
SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/jr2-a7280cr3-32d4-40x100G.config.bcm
SAI_SWITCH_NON_ECMP_MAX_SIZE=3072

2
device/arista/x86_64-arista_7800r3a_36d2_lc/Arista-7800R3A-36D2-C36/0/sai.profile
View File

@ -1,2 +1,2 @@
SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/j2p-a7800r3a-36d-36x400G.config.bcm
SAI_SWITCH_NON_ECMP_MAX_SIZE=3072

2
device/arista/x86_64-arista_7800r3a_36d2_lc/Arista-7800R3A-36D2-C72/0/sai.profile
View File

@ -1,2 +1,2 @@
SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/j2p-a7800r3a-36d-36x400G.config.bcm
SAI_SWITCH_NON_ECMP_MAX_SIZE=3072

2
device/arista/x86_64-arista_7800r3a_36d2_lc/Arista-7800R3A-36D2-D36/0/sai.profile
View File

@ -1,2 +1,2 @@
SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/j2p-a7800r3a-36d-36x400G.config.bcm
SAI_SWITCH_NON_ECMP_MAX_SIZE=3072

1
device/nokia/x86_64-nokia_ixr7250e_36x400g-r0/Nokia-IXR7250E-36x100G/0/sai.profile
View File

@ -1 +1,2 @@
SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/jr2cp-nokia-18x100g-4x25g-config.bcm
SAI_SWITCH_NON_ECMP_MAX_SIZE=3072

1
device/nokia/x86_64-nokia_ixr7250e_36x400g-r0/Nokia-IXR7250E-36x100G/1/sai.profile
View File

@ -1 +1,2 @@
SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/jr2cp-nokia-18x100g-4x25g-config.bcm
SAI_SWITCH_NON_ECMP_MAX_SIZE=3072

1
device/nokia/x86_64-nokia_ixr7250e_36x400g-r0/Nokia-IXR7250E-36x400G/0/sai.profile
View File

@ -1 +1,2 @@
SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/jr2cp-nokia-18x400g-config.bcm
SAI_SWITCH_NON_ECMP_MAX_SIZE=3072

1
device/nokia/x86_64-nokia_ixr7250e_36x400g-r0/Nokia-IXR7250E-36x400G/1/sai.profile
View File

@ -1 +1,2 @@
SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/jr2cp-nokia-18x400g-config.bcm
SAI_SWITCH_NON_ECMP_MAX_SIZE=3072