Cisco Cisco ATM Port Adapter Technical Manual
IP Phone Replies to One Ping Out of Two
Document ID: 25200
Contents
Introduction
Prerequisites
Requirements
Components Used
Conventions
Replying to a Ping
Known Issues
Related Information
Prerequisites
Requirements
Components Used
Conventions
Replying to a Ping
Known Issues
Related Information
Introduction
This document describes why the IP phone only replies to one ping when it is pinged twice.
Prerequisites
Requirements
Readers of this document should be knowledgeable of the following:
Cisco IP Phone
•
Cisco Unified Communications Manager (Unified CM)
•
Components Used
The information in this document is based on the software and hardware versions:
Cisco CallManager version 3.x
•
Cisco Unified CM 5.x/6.x/7.x/8.x
•
Cisco IP Phone version 79xx
•
The information in this document was created from the devices in a specific lab environment. All of the
devices used in this document started with a cleared (default) configuration. If your network is live, make sure
that you understand the potential impact of any command.
devices used in this document started with a cleared (default) configuration. If your network is live, make sure
that you understand the potential impact of any command.
Conventions
For more information on document conventions, see the Cisco Technical Tips Conventions.
Replying to a Ping
When trying to ping an Cisco IP Phone 79xx from a router, the phone will only reply to one ping out of two
and intermittent ping drop happens.
and intermittent ping drop happens.
router > ping ipphoneA
Type escape sequence to abort.
Sending 5, 100−byte ICMP Echos to ipphoneA, timeout is 2 seconds: