14

I noticed in the running config I don't see the no synchronization command under the BGP section. Is this a default command so I won't see it unless I change it?

Hardware / software

  • Cisco 1921

  • c1900-universalk9-mz.SPA.151-4.M5

18

In most modern versions of IOS (since 12.2(8)T - thanks @ytti) BGP synchronization is disabled by default (and shown in the running config as such, ie no synchronization shows up in show run when you turn on BGP). As to which IOS version they decided to make it a "hidden default", I'm not entirely too sure, but you should be able to do:

show running-config all

or

show running-config full

To get the router to show the entirety of the running config, including the defaults which are normally hidden. Look for no synchronization in there.

  • 5
    It's been disabled since 12.2(8)T so many years now, ref: cisco.com/en/US/tech/tk365/… – ytti Jun 3 '13 at 19:45
  • Yeah, I figured it had been a long time, I just didn't remember which release they decided to make "no synchronization" the default, which would make sense. As to what version they decided to make the default "hidden" in, I'm not sure. – John Jensen Jun 3 '13 at 19:47

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.