topic Re: LACP load balancing algorithm in Next-Generation Firewall Discussions

LACP load balancing algorithm

VPenkivskyi — Tue, 21 Jun 2022 13:56:45 GMT

Hello Team,

Where I can find information about how traffic balance between physical interfaces in case when LACP used?

Can I choose balancing method in configuration (source/destination, MAC/IP Addr, L4 Ports)?

I found information about traffic distribution mechanism in LAG for early versions of software (prior 6.1😞
https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClV5CAK
But there is no info in case when LACP using.

Thanks

aleksandar.astardzhiev — Thu, 07 Jul 2022 12:53:06 GMT

LACP support was introduced in verion 6.1 and haven't change since (at least from what I know). So this document is still valid.

Which means if all interfaces in the group have equal priority firewall will use the last three bits from the session ID and use it as hash value. I think this comment gives more details - https://live.paloaltonetworks.com/t5/general-topics/can-someone-describe-the-load-balancing-algorithm-used-for/m-p/36571/highlight/true#M26892