We have a problem with one of our DSL sites that do a site to site VPN to our ASA so we can monitor the site and have access to it remotely. Their internet does a breakout for their www and mail, so not to pass over the VPN. On our side we have a new subnet we want to have access to the remote site, but we can only get to the remote DSL site once we ping from one of the remote site servers/PC's to the new subnet, or when we use an IP SLA.
Why would we have access to the remote DSL site only once we've pinged from it to the new subnet or use an IP SLA to monitor? With no IP SLA on the DSL router, when it boots, we cannot get to the remote site from the new subnet.
Please let me know if I need to elaborate, send a network diagram or configurations for the ASA or DSL router.