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Forum Discussion
GS516T problem 802.3ad LAG/LACP - only one direction full bandwidth
Hi all In reference to this post: https://community.netgear.com/t5/Managed-Switches/XS728T-problem-802-3ad-LAG-LACP-only-one-direction-full/m-p/1079353/highlight/true#M1786 I have the same probl...
Hi community,
After having a longer talk with the Netgear support;
It's obvious that the switch only supports IEEE 802.3ad with destination MAC address hashing; so therefoe you/me/all only have unidirectional load balancing.Unforantetly there is no information about this limitation (or even possibilities) in the datasheet. Unfortunately there is no effort to fix/change this hardcoded behaviour within the firmware (they redirect me to the more expensive product lines of Netgear - so that is maybe a marketing descision not to support bi-directional load balancing). There is no possiblity that Netgear takes the switch back; so there is no money-back-guarantee.
Have a great day
Tom
Retired_Member wrote:
Cisco supports those hashing configurations:Cisco does offer Mac and MAC/IP up to the Cisco 550X Series Stackable Managed Switches class - that's the counterpart to Netgear's top-of-the-line stackable switches - and does leave any further details open, too:
Retired_Member wrote:
I have the same problem with the GS516T that i‘ve buyed today.That would be an almost 20 year old switch - so a GS516TP probably.
What is the exact use and test case in your deployment?Can't speak for the GS516TP (no such device here) - when pushing data from multiple systems [so different source MAC] to an IP address (QTS NAS here) served by a teo or more LACP LAGs operated on various similar switches like the mentioned XS728T/XS748T (v6.5.1.36) or an MS510TX (v6.7.0.37) we find the upload traffic flowing over multiple members of the port channel - so the impression is there is (at least) a src-dst-mac hash used.
As far as i understand; in case you want to be able to configure the hashing algorythms for LACP (regardless if L2 or L3) you have to go by the M-Series. Check: Usermanual Page 200 - there is a screenshot of the configuration options available.
The GS Series seems to be for amateurs only when it comes to LACP - senselessly castrated from software perspective, because the hardware is fast as hell.
This are L2 options:
- src-mac — Source MAC addresses
- dst-mac — Destination MAC addresses
- src-dst-mac — Source and destination MAC addresses
This are L3 options:
- src-ip — Source IP addresses
- dst-ip — Destination IP addresses
- src-dst-ip — Source and destination IP addresses (Default)
This are L4 options:
- src-port — Source Layer 4 port
- dst-port — Destination Layer 4 port
- src-dst-port — Source and destination Layer 4 port
On the Cisco boxes you can connect to it by using SSH and then you can configure the exact settings by using the CLI.
Conclusion: What a brain releases a switch that is doing dst-mac only; that just angers the customers. Support it properly or leave it is my suggestion.
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