VPN - tunnel comes up ( request timed out)

VPN tunnel comes up but get ping : request timed out from access switch.

Site A, B

Site A ( ASA, core switch, access switch)

• Core switch - can bring up tunnel to site B ✔️ Can get ping replies when pinging host on site B) ✔️

-Access switch - Can bring up tunnel by pinging host machine of site B, but does not get ping replies ✖️ - host machine on site A, gets request timed out when pinging host machine on site B ✖️

Site B

Can ping/replies core switch of site A, and can bring tunnel up ✔️

However can’t ping host machine of site A, and gets request timed out ✖️

Not sure who’s fault it is, as it stands we can’t ping each other’s host machine, from the PC.