We have 2 buildings which are interconnected by 2 wireless P2P links. One is used as main connection, the second one is for redundancy and backup. So far, we have these 2 buildings in flat L2 network and each building A and B has 1 "core" switch where wireless APs are connected. These 2 APs are different vendor and different speed ( Mikrotik and Alcoma ). Simple diagram should explain it a bit better:
We bundled those 2 links in PAgP because those wireless links are transparent for the switches and link between Catalyst 3560 and Catalyst 2960S is shown as 1000Mbit full duplex. Mikrotik is using 802.11ac, finding more info for Alcoma is somehow difficult, because it's old model and I couldn't find any info from manufacturer. All I know is that it works in 24GHz band.
The question here is, should this even work? From what I know, PAgP and Etherchannel works over Ethernet links and those links must have the same speed and duplex settings. What are the outcomes of this little "cheat" using transparent bridges? We noticed, that from time to time bundle is broken on Mikrotik port ( Gi0/39 ) but after issuing shutdown/no shutdown, bundle is successfully created again. I am suspecting that some timers in PAgP are not met or the link is not as stable?
Could this work without PAgP and manually setting up Etherchannel?
Thanks for insight!