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Configuring IP Managing IP

OmniSwitch 6800/6850/9000 Network Configuration Guide June 2006 page 12-23

Setting the Minimum Packet Gap

The minimum packet gap is the time required between sending messages of a like type. For instance, if the

minimum packet gap for Address Mask request messages is 40 microseconds, and an Address Mask

message is sent, at least 40 microseconds must pass before another one could be sent.

To set the minimum packet gap, use the min-pkt-gap keyword with any of the ICMP control commands.

For example, to set the Source Quench minimum packet gap to 100 microseconds, enter the following:

-> icmp type 4 code 0 min-pkt-gap 100

Likewise, to set the Timestamp Reply minimum packet gap to 100 microseconds, enter the following:

-> icmp timestamp reply min-pkt-gap 100

The default minimum packet gap for ICMP messages is 0.

ICMP Control Table

The ICMP Control Table displays the ICMP control messages, whether they are enabled or disabled, and

the minimum packet gap times. Use the show icmp control command to display the table.

ICMP Statistics Table

The ICMP Statistics Table displays the ICMP statistics and errors. This data can be used to monitor and

troubleshoot IP on the switch. Use the show icmp statistics command to display the table.

Using the Ping Command

The ping command is used to test whether an IP destination can be reached from the local switch. This

command sends an ICMP echo request to a destination and then waits for a reply. To ping a destination,

enter the ping command and enter either the destination’s IP address or host name. The switch will ping

the destination by using the default frame count, packet size, interval, and time-out parameters (6 frames,

64 bytes, 1 second, and 5 seconds, respectively). For example:

-> ping 172.22.2.115

When you ping a device, the device IP address or host name is required. Optionally, you may also specify:

• Count. Use the count keyword to set the number of frames to be transmitted.

• Size. Use the size keyword to set the size, in bytes, of the data portion of the packet sent for this ping.

You can specify a size or a range of sizes up to 60000.

• Interval. Use the interval keyword to set the frequency, in seconds, that the switch will poll the host.

• Time-out. Use the time-out keyword to set the number of seconds the program will wait for a response

before timing out.

For example, to send a ping with a count of 2, a size of 32 bytes, an interval of 2 seconds, and a time-out

of 10 seconds you would enter:

-> ping 172.22.2.115 count 2 size 32 interval 2 timeout 10

Note. If you change the default values, they will only apply to the current ping. The next time you use the

ping command, the default values will be used unless you enter different values again.

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