L2 or L3 Load Sharing


Hi!

Is there anyone who can explain a bit about the differences between layer 2 and layer 3 load sharing?

Why would I choose layer 2 before layer 3 for example?

If there's only multicast on the ports, would it be better to use layer 3?

Any information is greatly appreciated.

Thanks!

6 replies

Userlevel 4
Layer 2 will consider only Mac address for hashing
L3 considers Ip .... If it is multicast with different IP subnets l3 should be good
Userlevel 3
PARTHIBAN CHINNAYA wrote:

Layer 2 will consider only Mac address for hashing
L3 considers Ip .... If it is multicast with different IP subnets l3 should be good

Hi PARTHIBAN,

Is it Multicast traffic will load shared in a lag???
Userlevel 2
Additionally, when using L3 routing algorithms you can benefit of "equal cost load balancing", which actually distributes traffic based on link load.
Userlevel 3
rbrt_weiler wrote:

Additionally, when using L3 routing algorithms you can benefit of "equal cost load balancing", which actually distributes traffic based on link load.

Hi Robert,

Could you explain more about L3 routing protocol to "equal path load balancing" for traffic to distributes the load on links. Thanks.
Userlevel 2
rbrt_weiler wrote:

Additionally, when using L3 routing algorithms you can benefit of "equal cost load balancing", which actually distributes traffic based on link load.

Hi Paul,
Just ask Google about it. For example, it leads to this Wikipedia article: http://en.wikipedia.org/wiki/Equal-cost_multi-path_routing
The common routing protocol to use in a LAN is OSPF by the way. Again, Google knows a lot about it.
Userlevel 3
rbrt_weiler wrote:

Additionally, when using L3 routing algorithms you can benefit of "equal cost load balancing", which actually distributes traffic based on link load.

Thanks anyway Robert, Here i am in the HUB.

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