I am connecting 2 buildings together over a Laser line of site link.On both sides of the Link are 2 3550 Layer 3 switches.I just need someone to check if what I am trying to do is correct.
I am setting up a routed hop between the 2 switches by setting up the ports on both sides in the same vlan and IP subnet.
this link is actually connecting 2 different companies together because of an aquisition.
The one side has 11 vlans and the other side has everything in 1 Vlan which is the default.
Do i need to setup the ports that the laser device is connecting to as a 802.1q trunk or ISL trunk in order for All the Vlans to communicate between each other.I will also configure EIGRP on both layer 3 switches in order to advertise the networks to us and vice versa.
The laser link has got a wireless backup link which I would like to let eigrp pickup the primary route and if that fails the wireless will become the prefered route to the destination networks on the other side.
I was going to use rapid spanning tree , but I decided not to in order to avoid one huge spanning tree.Much safer going for the Layer 3 routing or routed hop option with the switches.
Can someone point me in the right direction and just confirm that I am on the right track of getting this Laser link working with 3550 Layer 3 switches on both sides of the link.
If you are running the link as a routed link, then don't set it up as a trunk of any type. The 3550's should learn about the networks (vlans) on the other side, and route to them through the laser link.
Obviously use your own IP addressing scheme and make sure you are either running a routing protocol or have static routes covering the networks available either side of the link (run a routing protocol...)
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