Posted on March 30, 2018 2:00 pm
 |  Asked by Rune Kausland
Print Friendly, PDF & Email

Does anyone know if BGP ttl security hops is supported in EOS?

router bgp 1234

  neighbor ttl-security hops 1

Answered on March 30, 2018 2:36 pm

Hi Rune.


I believe you might be looking for the feature below:

Posted by manuel
Answered on March 30, 2018 4:51 pm

Hi Rune,

GTSM was introduced in 4.17.1F:


Posted by Tamas Plugor
Answered on March 30, 2018 5:21 pm

Hey Rune,

It is, please see below:

ats324…17:18:42(config-router-bgp)#neighbor ttl ?

  maximum-hops  maximum IP hops

ats324…17:18:42(config-router-bgp)#neighbor ttl maximum-hops ?

  <0-254>  maximum number of hops

ats324…17:18:42(config-router-bgp)#neighbor ttl maximum-hops 1 ?


ats324…17:18:42(config-router-bgp)#neighbor ttl maximum-hops 1


Hope this helps,


Answered on May 20, 2018 2:49 pm

BTW, “ttl” seems to be a hidden command (I am on 4.19.x)

(config-router-bgp)#neighbor ?

soft-reconfiguration Configure how to handle routes that fail import
timers Timers
transport Configure transport options for TCP session
update-source Specify the local source interface for peer BGP sessions

Also, is this RFC5082 compliant?

It might be related to your EOS version. The feature might be available in a later version than the one you are running.
Yes it follows the RFC 5082.

(Alexis Dacquay at November 16, 2018 12:14 pm)

Post your Answer

You must be logged in to post an answer.