In a collapsed Core/DL U-shaped design with 2x10G port-channeled links to each access switch what would be recommended for the L3 link between the Core from a Sizing perspective. I would assume that ideally all things being equal this link should be used to a minimum (routing updates) and will mostly be used to pass traffic in case of a failure. However if all is not equal than this might be an issue. Could someone please advise on what would determine the capacity of this link keeping in mind that this is the link between the Core as opposed to a distribution. It would be great to know in general what the recommended best practice would be for sizing these links regardless if it was between the Core or the Distribution. Thx for your help.