Guidelines For Evaluating A Client Network Ping - Avaya DEFINITY Manual

Setting up the MAPD Configuration

Guidelines for Evaluating a Client Network Ping

The results displayed in the packet loss field (z) will range from 0 percent to 100
percent. The number of packets that are "lost" (need to be retransmitted), will vary
from LAN to LAN. For some LANs, 0 percent packet loss is normal, while for
others, 10 percent or 20 percent loss is normal. The degree of packet
transmission over a LAN depends upon the distance between machines, the
number of users on the LAN, and the number of machines on the LAN.
If You Observe 0 to 49 Percent Loss
Consider this test successful if the MAPD system reports a packet loss
percentage in the range from 0 to 49 percent. Contact the customer LAN or
system administrator, however, if the packet loss is from 10 to 49 percent. The
customer administrator should be advised that the send and receive packets test
(PING test) showed the loss. A loss in this range may cause the MAPD system to
experience slow response time. Possible causes for this type of loss include
network congestion, or a faulty device on the network.
If You Observe Packets out-of-sequence
For a successful test (0 to 49 percent), also examine the icmp_seq = field. If
one or two of the packets appear out of sequence, then the condition is
acceptable. If, however, more than two packets are out of sequence (for example,
0, 2, 5, 3, 1...), then inform the customer administrator. Out-of-sequence packets
may indicate network congestion or misrouting.
If You Observe 50 to 99 Percent Loss
Consider this test a failure if the packet loss value is in the range of 50 to 99
percent. In this range, the MAPD will be extremely slow, or will completely fail to
communicate even though it has made a connection to the LAN. If you have a
system that is reporting a 50 percent to 99 percent packet loss, cancel and refer to
the troubleshooting procedure for a TCP/IP connection in Appendix D,
''Troubleshooting
If this test has completely failed and the system reports a 100 percent packet loss,
verify that you used the correct address. The test does not report if the test failure
is due to sending the packets to an incorrect or nonexistent machine. A 100
percent packet loss indicates that the MAPD system has not established
communication over the LAN to the test machine address.
If you entered the right address, cancel and refer to the troubleshooting procedure
for a TCP/IP connection in Appendix D,
3-18 Issue 3 May 2002
Procedure.''
''Troubleshooting Procedure.''