Setting the Time-To-Live (TTL)


Before you use the CLI to set the TTL, you must be at the global configuration level.

The Time-To-Live (TTL) is the maximum number of routers (hops) through which a packet can pass before being discarded. Each router decreases a packet’s TTL by 1 before forwarding the packet. If a router decreases the TTL to 0, the router drops the packet instead of forwarding it.

Setting the TTL

Use the ip ttl <number-of-hops> command to set the TTL. The default value for the TTL is 64 and the range is 2 - 255.


The following example sets the TTL to 60.

switch(config)# ip ttl 60