Two sites are involved - one is a cable ISP, the other is T1's
normally packet loss is less than 1% and time of pings is around 130ms between sites
today all of the sudden the packet loss jumped to 15% and pings over 200ms between sites
i've checked from two neutral (outside) locations and the pings/packet loss is normal with both sites (less than 1%).
so the only loss is between these two sites specifically - outbound pings to google, etc. also show less than 1% loss from both sites.
internal communication at each site is fine. I have a secondary router in place in one of the sites and the loss is the same between sites about 15% and over 200ms