Clarification on ring topology with LAG setup

[Virin_Mangat]

We have 3 sites that deploy 2 x460 at each site in a stack. The sites are connected to each other via a shared interface of two ports on each site

Site A Port 25, Port 26 --> Site B Port 27, Port 28
Site B Port 25, Port 26 --> Site C Port 27, Port 28
Site C Port 25, Port 26 --> Site A Port 27, Port 28

For all three sites, Port 25 and Port 27 have been configured as the master logical port

Everything is working as per order. However on checking, I can see that only Port 25 on Switch C and Port 27 on Switch A are on Ready state (blocking). Port 26 on Switch C and Port 28 on Switch A are both Active. 

Just wanted to confirm if this is an expected behavior as I would expect all four ports between switch C and Switch A would be in a blocking state.

[Gabriel_G · Accepted solution]

Ready does not mean blocking, ready means that the link is down.

It is impossible to say what is expected without more information on your design, if the links are actually up, and what protocol you're using to block the potential loop around the ring.

[FredrikB-NN2]

So, these are LAGs between the sites, right? What ring protocol do you use, EAPS, ERPS, STP or something else? Routed with IS-IS, OSPF or BGP perhaps?

If this is EAPS (which it seems to be), there is no reason for the protocol to take down the ports. You probably have a link problem. It could be an SFP, fiber or something else that is broken. Have you checked the optical values?

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