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Cisco Bug: CSCvu01211 - Doc: Multi-instance max connection inconsistency between FXOS config guide and whitepaper

Last Modified

May 12, 2020

Products (1)

  • Cisco Firepower 9300 Series

Known Affected Releases

2.8(1)

Description (partial)

Symptom:
Need to fix the inconsistency between following 2 documents regarding concurrent maximum connection on multi-instance.

Cisco Firepower Threat Defense Multi-Instance Capability on Cisco Firepower 4100 and 9300 Series Appliances White Paper
https://www.cisco.com/c/en/us/products/collateral/security/firepower-ngfw/white-paper-c11-742018.html#_Toc4117121

Cisco Firepower 4100/9300 FXOS CLI Configuration Guide,
https://www.cisco.com/c/en/us/td/docs/security/firepower/fxos/fxos281/cli-guide/b_CLI_ConfigGuide_FXOS_281/logical_devices.html#id_117677

Assume customer want to use Firepower 9300 SM-24 (same as described on FXOS config guide).
Maximum concurrent sessions should be
44(RE_PROFILE) * 30,000,000 / 46 = 28,750,000 according to "Estimating the maximum concurrent connections supported by a container instance" on whitepaper.
44 means that 2 cores are needed for FXOS and customer can use others for 1 big instance.

But FXOS configuration guide says
Multi-instance max concurrent connections, if using a single instance: approximately 21,000,000 to 24,000,000 in case of Firepower 9300 SM-24.

There are big difference regarding concurrent maximum connection value.

Conditions:
NA this is a request to fix the document
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