Hi,
May be the router using different interface IP as source when initiating the ping. Try to ping using extended ping option.
R1#ping
Protocol [ip]:
Target IP address: Your PC IP
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface: Interface IP (behind which PC connected)
Also make sure no access lists (on router) blocking the ICMP messages.
Thx
MS
