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ttl value on outgoing int

sarahr202
Level 5
Level 5

Hi everybody.

How is every one doing?

1) How do we configure TTL value on a router's interface?

2) Does  router consider this value when routing any packet out of the interface or it only considers that value when forwarding multicast packets out of the interface?

thanks and have a great day.

1 Accepted Solution

Accepted Solutions

Julio Carvajal
VIP Alumni
VIP Alumni

Hello Sara,

I would say we cannot, I mean on a tunnel interface we can set a tunnel ttl command, but I mean as far as I can tell I only have seen it taken into consideration for multicast traffic as you already said.

Ofcourse the regular usage of the TTL to avoid packets traveling across your network forever

I would like to hear if someone has any other idea

Hope that I could help

By the way, what is the idea of this, what are you looking for?>

Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC

View solution in original post

3 Replies 3

Julio Carvajal
VIP Alumni
VIP Alumni

Hello Sara,

I would say we cannot, I mean on a tunnel interface we can set a tunnel ttl command, but I mean as far as I can tell I only have seen it taken into consideration for multicast traffic as you already said.

Ofcourse the regular usage of the TTL to avoid packets traveling across your network forever

I would like to hear if someone has any other idea

Hope that I could help

By the way, what is the idea of this, what are you looking for?>

Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC

Hi Julio

Thanks for your reply.

I was reading how TTL value is used to scope  multicast traffic.  I was just curious If this value only influences multicast traffic or all traffic going out of a particular interface.   I also noticed that the only command  available to configure ttl on a int is:

R3(config-if)#ip multicast ttl-threshold

Have a great day.

Hello Sarah,

Exactly, that is where I have seen it so far

Have a great study time

Regards,

Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC