Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

How to discover the MTU?

The extended ping command with sweep range of sizes option allows you to vary the sizes of the echo packets being sent. This capability is useful for determining the minimum sizes of the MTUs configured on the nodes along the path to the destination address.How can this command discover the MTU along a path to a destination?

1 REPLY

Re: How to discover the MTU?

If you send a ping packet with a size = 500 bytes, and along the way to destination, any router has an MTU size say 400 bytes....and if you set the Dont Fragement bit of the packet, the router cannot send the packet, without fragmenting it. So it will drop the packet and sent an ICMP message to the host. This way you can find out the MTU along the path.

312
Views
0
Helpful
1
Replies
CreatePlease to create content