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New Member

L2 or L3 link between distros

I understand that when you are going to summarize from your two distro switches against the core network, you are requered a layer 3 linke between the distro switches. But if you dont have this posibility and have to use L2 can I just skip using summarization?..

I understand that when you have a L3 between distros that if you have a loss off connectivity down to one of your L2 vlans in access-layer and when using summarization that the distro dont advertises this loss to core. It is just rerouting this over to the other distro over that L3..

What about if this is a L2 trunk, then this distro would drop this traffic until the convergen has happen. But then I cant use summarization, right?.... How would you solve this best?


New Member

Re: L2 or L3 link between distros

anybody that knows about if it is posible to summarize up to core in this scenario if I dont have a L3 between distribution switches. If one of the uplinks from access-switch are down how would then core know this if the route are summarized and since it is a L2 trunk the distribution switch will not be able to route that to the other...