06-11-2007 02:00 PM - edited 03-05-2019 04:38 PM
If I want to connect a Layer 3 switch (Cat4500 w/SupIV, running EIGRP) to a WAN router (7206 w NPE300, running EIGRP), I see that it can be accomplished using two different methods:
1) Create a routed ethernet port on the L3 switch, assign an IP address, and connect it to a routed ethernet port on the router, in the same IP subnet. All non-local packets will be routed between the L3 switch and the WAN router.
or
2) Utilize an existing VLAN and VLAN interface on the L3 switch, and connect a switchport in this VLAN to the routed port on the router, where the router's IP address is in the same IP subnet as the VLAN interface of the switch. In this model, the L3 switch is the default gateway for hosts on the subnet, and it switches non-local packets to the WAN router at Layer 2.
I see both ways done in our network, and I tend to support method 1 as the best method, but both seem to work.
What is the recommended way to connect these two devices?
Thanks,
RonB
06-11-2007 05:32 PM
RonB
As you mention both methods will work and it becomes a choice with few clearly defined parameters. I share your opinion that a layer 3 routed link is attractive, in part because now convergence in the event of a network failure is a function of the routing protocol and not of Spanning Tree. But other people may have different opinions - and they are welcome to share them.
HTH
Rick
06-11-2007 07:46 PM
the 1 method best for your requrierment.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide