7.1 A Ping Operation Fails
This section provides a troubleshooting flowchart and describes step-by-step troubleshooting
procedures for a ping failure.
7.1.1 The Ping Operation Fails
Common Causes
If the source end does not receive any response to its Request packet from the destination end
within a specified period, the ping operation fails.
This fault is commonly caused by one of the following:
l The link transmission delay is too long. Therefore, if the source end does not receive any
Response packet from the destination end within the waiting time, the ping operation fails.
l There are improper configurations. For example, packet fragmentation is not enabled when
a large Ping packet is sent but the outbound interface of the packet has a smaller MTU.
l Routing entries or ARP entries (for Ethernet links) are incorrect.
l The hardware is faulty.
Troubleshooting Flowchart
Figure 7-1 shows the troubleshooting flowchart.
Huawei AR2200-S Series Enterprise Routers
Troubleshooting 7 IP Forwarding and Routing
Issue 01 (2012-01-06) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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