Will the APS work for the following setup ?
SiteA is connected to siteB via STM-1 link.
At site A; There are 2 POS links connected to router1 and router2. Router1 configured with APS working and router2 configured with APS protected.
At siteB, there is only 1 POS link to router1. There is no APS configuration configured at SiteB.
Is the APS redundancy switchover only involve the local "last mile" or does it send end to end keepalive ?