You can also check the driver stats to find out if the ATM connection is receiving any cells. In the /proc/net/atm directory of your Linux host, use 'cat' to display your driver statistics. The name of the driver will vary depending on the ATM card you are using.
Example
[root@server lab]# cd /proc/net/atm/
[root@server atm]# ls
arp devices lec pca200e:0 pvc svc vc
[root@server atm]# cat pca200e\:0
device:
internal name: PCA-200E-0
PCI bus/slot/function: 2/7/0
interrupt line: 11
physical base address: 0xfe000000
virtual base address: 0xe0955000
factory address (ESI): 00:20:48:40:2c:e0
board serial number: 11488
supplied small bufs (1): 32
supplied large bufs (1): 32
supplied small bufs (2): 50
supplied large bufs (2): 61
cell processor:
heartbeat state: 0x7312fc0c
firmware release: 4.1.12
monitor release: 12.0
media type: multimode optical fiber SC
OC-3 revision: 0x30
OC-3 mode: normal operation
monitor:
version number: 12
boot status word: 0xce11feed
device statistics:
4b5b:
crc_header_errors: 0
framing_errors: 0
OC-3:
section_bip8_errors: 0
path_bip8_errors: 0
line_bip24_errors: 0
line_febe_errors: 0
path_febe_errors: 0
corr_hcs_errors: 0
ucorr_hcs_errors: 0
ATM: cells
TX: 0
RX: 0
vpi out of range: 0
vpi no conn: 0
vci out of range: 4
vci no conn: 5472
AAL0: cells
TX: 0
RX: 0
dropped: 0
AAL3/4:
SAR sublayer: cells
TX: 0
RX: 0
dropped: 0
CRC errors: 0
protocol errors: 0
CS sublayer: PDUs
TX: 0
RX: 0
dropped: 0
protocol errors: 0
AAL5:
SAR sublayer: cells
TX: 1423
RX: 2146
dropped: 0
congestions: 0
CS sublayer: PDUs
TX: 799
RX: 910
dropped: 0
CRC errors: 0
protocol errors: 0
AUX: allocation failures
small b1: 0
large b1: 0
small b2: 0
large b2: 0
RX PDUs: 0
receive carrier: ON
VCCs:
address VPI.VCI:AAL (min/max tx PDU size) (min/max rx PDU size)
dfa81800 0.32:5 (30/67) (70/108)