Ping results in cisco routers

[jade]

I have just enrolled for the CCNA class to prepare for the well known CCNA certification. I tried the ping command and it works, But Ping results in cisco routers and a normal computer differes, also the parameters are different.. Can anyone help me understand the difference and the usage of ping on cisco routers? Thanks in advance...

[Big Fish]

Ping is a computer network tool used to test whether a particular host is reachable across an IP network; it is also used to self test the network interface card of the computer, or as a latency test. It works by sending ICMP “echo request” packets to the target host and listening for ICMP “echo response” replies. Ping measures the round-trip time and records any packet loss, and prints when finished a statistical summary of the echo response packets received, the minimum, mean, max and in some versions the standard deviation of the round trip time.

[Shen]

The ping command is a very common method for troubleshooting the accessibility of devices. It uses a series of Internet Control Message Protocol (ICMP) Echo messages to determine:

• Whether a remote host is active or inactive.
  
• The round-trip delay in communicating with the host.
  
• Packet loss.

The ping command first sends an echo request packet to an address, then waits for a reply. The ping is successful only if:

• the echo request gets to the destination, and
• the destination is able to get an echo reply back to the source within a predetermined time called a timeout. The default value of this timeout is two seconds on Cisco routers.

The TTL value of a ping packet cannot be changed.

[Milton.J]

ping (user)

To diagnose basic network connectivity on AppleTalk, CLNS, IP, Novell, Apollo, VINES, DECnet, or XNS networks, use the ping (packet internet groper) user EXEC command.

syntax :

ping [protocol] {host | address}

Syntax Description :

protocol - (Optional) Protocol keyword, one of apollo, appletalk, clns, decnet, ip, ipx, vines, or xns.

host - Host name of system to ping.

address - Address of system to ping.


ping (privileged)

To diagnose basic network connectivity on Apollo, AppleTalk, Connectionless Network Service (CLNS), DECnet, IP, Novell IPX, VINES, or XNS networks, use the ping privileged EXEC command.

syntax :

ping [protocol | tag] {host-name | system-address} [data [hex-data-pattern] | df-bit | repeat [repeat-count] | size [datagram-size] | source [source-address | async | bvi | ctunnel | dialer | ethernet | fastEthernet | lex | loopback | multilink | null | port-channel | tunnel | vif | virtual-template | virtual-tokenring | xtagatm] | timeout [seconds] | validate]

See this for more help : http://www.cisco.com/en/US/docs/ios/...html#wp1018913