RPD (Routing Protocols Daemon) crash happen with core file on back RE (Routing Engine) on PTX-EVO after configuring NSR (nonstop-routing) and ISIS purge-originator on the same commit. problem is related to replicated ISIS database that has some purged LSPs from master to backup RE .no service impact as the crash is only on backup RE

RPD core will be triggered by the below actions on orders

1- Master RE without NSR has some purged ISIS LSPs

LSP ID           Sequence Checksum Lifetime Attributes

LSP-ID_1       0x2    0     0 L1 L2 Attached >>>>>>>>some purged ISIS LSPs

LSP-ID_2       0x1    0     0 L1 L2 Attached

LSP-ID_3        0x1    0    0 L1 L2 Attached

LSP-ID_4        0x1    0    0 L1 L2 Attached

LSP-ID_5        0x1  0x8308   828 L1 L2 Attached

2- configuring NSR and isis purge-originator on one commit

set protocols isis level <*> purge-originator empty

set routing-options nonstop-routing 

commit

3- RPD crash and core will be generated on backup RE

User@PTX-EVO-re0# run show system core-dumps   

re0:

--------------------------------------------------------------------------

re1:

--------------------------------------------------------------------------

-rw-r--r-- 1 root root  13864246 Nov 29 14:30 /var/core/re1/rpd.re.re1.20892.2023_11_29.14_29_51.tar.gz >>>>>>>RPD core file generated on RE1 (backup RE)

Get fix of PR1774542 for permanent solution

as a workaround , customer needs to avoid configuring NSR + purge-originator in the same commit