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Performance and Fault Management by James M. Thompson, Kent J. Phelps, Robert L. Pavone, Christopher E. Elliott, Paul L. Della Maggiora

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Ping

Ping is commonly used to check connectivity between devices. It's the most common protocol used for availability polling. It can also used for troubleshooting more complex problems in the network.

Ping uses Internet Control Message Protocol (ICMP) Echo and Echo Reply packets to determine whether one IP device can talk to another. Most implementations of ping allow you to vary the size of the packet. Table 8-1 shows packet size statistics for Cisco IOS and Catalyst devices.

Table 8-1. Ping Packet Sizes for Cisco Devices
Device Minimum Packet Size Maximum Packet Size Default Packet Size
Cisco IOS 36 bytes 18024 bytes 100 bytes
Cisco Catalyst 56 bytes 472 bytes 64 bytes

Most host-based implementations of ping send one packet per second. Cisco ...

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