This article explains how to check the reachability of a remote ATM node or virtual connection.
Customer was not able to reach ATM point-to-point virtual circuit identifier and all cells were getting lost.
DEVICE-A> ping atm interface at-2/0/3.2042 vci 18.2042
^C
--- atmping statistics ---
92 cells transmitted, 0 cells received, 100% cell loss
Start with the physical and logical status of port and vpi.vci. Check the VPIs and VCIs configurations on both local and remote ATM node. These are local to the router, means that only the two devices connected by the VCI or VPI need know the details of the connection.
In this customer case, issue was resolved after reloading the remote ATM node which suggest some transient issue at remote side.
53 byte oam cell received on (vpi=18 vci=2042): seq=1
53 byte oam cell received on (vpi=18 vci=2042): seq=2
53 byte oam cell received on (vpi=18 vci=2042): seq=3
53 byte oam cell received on (vpi=18 vci=2042): seq=4
53 byte oam cell received on (vpi=18 vci=2042): seq=5
53 byte oam cell received on (vpi=18 vci=2042): seq=6
6 cells transmitted, 6 cells received, 0% cell loss