I have 2 metro ethernet Layer 2 circuits by 2 different carriers. They fully pass all vlan traffic. When I do a show cdp neighbor command I see the switch on the other side. My question is, is it possible to etherchannel 2 ports over different carries. physically the 2 ports are not connected to each other just logically.
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They are not physically connected , each switch is connect physically to the carriers switch and then who knows how many other switches in between. But the carriers switches pass all traffic, so it is logically like they are directly connected, if that makes sense. so the problem I believe I would have is the switches would never be able to dell when one of the ports goes down because the actually physical port of the carrier switch most likely would be up, but one of the many other switches that could be in-between could be down.
Currently, I use one of them as a backup circuit. But it's manual, when one of the carriers goes down I have to plug in the other carrier on both ends of the circuit. Do you know if spanning tree would work in this case? I am trying to find an auto solution were I don't have to manually bring up the backup circuit.
right now one carrier is used as a backup, but when the other circuit goes down, I have to manually plug the backup circuit in, at both locations. So I am trying to get it automated some way. I thought etherchannel would be the only way.
No I have not tried that any variations, I am not all that familiar with the different stp variants. One side I have a cisco 3850 stacked and the other side I have a 3750X stacked. They are obviously layer 2 trunk ports. What would you suggest to try?
Joseph thanks for reply. Is there any way to know with out actually doing it if my vendors allow stp? I know cdp traffic is allowed because when I do Show CDP neighbors it shows my switch on the other end of the circuit.
Just thought of something. I think the problem I would have is if the circuit goes down not because of the directly connected switch, the line-protocol will not show down. thus will not trigger the event message. Can I use an IP SLA to ping an address on the other side and then generate a syslog message off that?
I found out how to use the ip sla to generate the syslog and there for I am working on EEM script do what you suggested. I will update when done, but I think it will work.