Status up Protocol up but can't ping!!!

What would be the cause of seeing status up/protocol up and not able to ping itself.

I'm at a loss, the telcom says they have checked and double-check the circuit and it looks good. The router on the other end the router is up and can ping itself. Heres the config of the router in question:

Building configuration...

Current configuration : 868 bytes ! version 12.1 no service single-slot-reload-enable service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname router !

! memory-size iomem 15 ip subnet-zero ! interface Serial0 ip address 192.168.253.250 255.255.255.0 encapsulation frame-relay IETF service-module t1 timeslots 1-4 frame-relay interface-dlci 16 frame-relay lmi-type ansi ! interface FastEthernet0 ip address 10.1.10.249 255.255.255.0 speed auto full-duplex no cdp enable ! router rip version 2 network 10.0.0.0 network 192.168.253.0 neighbor 192.168.1.0 ! ip classless no ip http server ! no cdp run ! line con 0 line aux 0 password xxxxx login modem InOut transport input all speed 28800 flowcontrol hardware line vty 0 4 password xxxxx login ! end

Do 'show frame-relay map', If there isn't a map for 192.168.253.250, then you can't ping yourself. This is somewhat analogous to arp cache, where you can't ping an address that you have no arp entry for.

If you configure a map for your own address you should have better luck. Downside here is that configuring static maps may disable frame-realy inverse arp and you might be unknowingly using that the get the map for the other ends ip address.

! interface Serial0 frame-relay map ip 192.168.253.250 16 !

Alternativley, you could change to using a point-to-point subinterface, assuming this is really a point-to-point connection, e.g.

! interface Serial0 no ip address encapsulation frame-relay IETF service-module t1 timeslots 1-4 frame-relay lmi-type ansi ! interface Serial0.16 point-to-point ip address 192.168.253.250 255.255.255.0 frame-relay interface-dlci 16 !