Hi, I am looking through the various algorithms that are there for Etherchannel Load Balancing and am trying to understand why would anyone ever configure the load balancing method to be based on the Mac Address. This is specifically targeted at 6500 Switches and considering that the topology is an Access Layer Switch dual homed to distribution layer switches in a V Topology. Now if the Access to Distribution links are L2 links carrying multiple VLANs than in most cases the traffic from servers connected on that Access Switch to remote devices will have the Mac-Address of the Default Gateway which is on the distribution. This would mean that 1 host will always communicate out to any remote host via that same link in the bundle. I would think that Src-Dst-Port would give a more distributed load on the links in that bundle. Can someone please correct me if I am missing something.
2. I have read through some documents that suggest that mls ip cef load-sharing full should be configured only at the distribution layer and at the core it should be left to the default of mls ip cef load-sharing simple. Just to confirm my understanding of this mls ip cef load-sharing full takes into account L4 port numbers in addition to src and dst ip addresses wheras the simple only takes into account the src and dst ip addresss. I would think again that it would be better to have mls ip cef load-sharing full configured everywhere to achieve a more distributed load in traffic. I believe the guide I was reading mentioned something about polarization and hence leaving it at the default on the Core and I cannot understand why this would happen?
3. I have always assumed that the mls ip cef load-sharing command is not needed on L2 access switches since it is used only when you have ECMP or multiple equal cost routes to the same destination. Just want to confirm that this is true.
4. Per documentation there is another keyword added to the mls ip cef load-sharing Full command which is simple. It says that the 'Full' uses unequal weight wheras with 'Full simple' equal weights are given to each link. I am not sure what weight refers to in this context. Could someone please explain.
Thx for your help.