Avaya Configuring IP, ARP, RIP, and OSPF Services Manual do Utilizador descarregar pdf (Página 71)

100

101

Configuring and Customizing IP

117356-E Rev 00

3-9

Setting the Time-to-Live Value on a Source Packet

Each IP data packet includes a time-to-live (TTL) value. The TTL value specifies

the maximum number of hops that the packet is allowed to traverse in the network

before an intermediate router discards the packet.

The router that originates the packet sets the TTL to a positive value. Each router

that receives the packet decrements the TTL counter by one. A router that receives

a packet with a TTL of zero discards the packet if the packet is not addressed to

itself. The TTL counter prevents packets from looping endlessly through the

network.

By default, IP sets the TTL field on each source packet (that is, each packet that it

originates and transmits) to 30 hops. You can use the BCC or Site Manager to set

the TTL value as required.

Using the BCC

To set the TTL value, navigate to the global IP prompt (for example,

box; ip

) and

enter:

ttl

<max_hops>

max_hops

is the maximum number of hops that the packet can traverse before an

intermediate router discards it.

For example, the following command sets the TTL value to 25 hops:

ip#

ttl 25

ip#

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