[c-nsp] 12k Full BGP Feed Memory Requirements

[Antonio Soares]

Hello group,

I need help in order to calculate the memory needed to accomodate 2 or more Full BGP Feeds. This is for a 12400 running IOS. Today i
saw this problem with some linecards:

++++++++++++++++++++++++++++++
%FIB-2-FIBDISABLE: Fatal error, slot X: no memory
++++++++++++++++++++++++++++++
%HW_RES_FAIL-4-LOW_CEF_MEM: SLOT Y is running low on E4_Lookup External SRAM resources.  CEF will begin resource constrained
forwarding operation if problem persists.  For additional details please see show ip cef resource and show ip cef summary
%LC-3-HWRESFAIL: OUT OF HW RESOURCES - FORWARDING MAY NOT BE ACCURATE.PLEASE CORRECT THE SITUATION AND TRY CLEAR CEF LINECARD TO
RECOVER
++++++++++++++++++++++++++++++

Slot X is a GE-GBIC-SC-B with 256 Mb of RAM and Slot Y is a 1X10GE-LR-SC with 512 Mb of RAM. The errors above occurred after the 2nd
Full BGP Feed was received. Linecards 4GE-SFP-LC with 512 Mb of RAM did not complain. Neither the SIP-600 with 1 Gb or the SIP-601
with 2Gb.

I have a PRP-2 with 1 Gb of RAM.

I understand that 256 Mb is definitely not enough. But i don't understand why the problem only affected the 1X10GE-LR-SC and not the
4GE-SFP-LC. Both have 512 Mb of RAM.



Thanks.

Regards,

Antonio Soares, CCIE #18473 (R&S)
amsoares at netcabo.pt