Hey guys, here's the scenario:
I'm using my laptop as a NTP server IP 10.10.10.25. Everything connects to a L2\\L3 3550 trunked IP 10.10.10.35 VLAN1. without sacrificing a dedicated interface on each router for time management how do I get the routers to sync-up with the laptop using just a loopback int.
Objective: to automatically sync up the routers with the NTP server every time I start my lab. Without dedicating an eth port for NTP.
Thanks
you could see if one of the routers or switches will behave as NTP master in a backup role.
Determine the NTP of the pc and then configure the stratunm on the router to be 1 less
ntp server ! assuming stratumn of 4 on PC ntp master 6 ! this oruter will become NTP master if there is no connectivity to PC
also see if router or switch in question supports command
ntp update calendar
Still I would have to dedicate a port on each router for connectivity to the master. And this is what I don't want to do. I would like to sync up the routers to a time source {PC or router master} with a logical loopback interface. That way I don't lose a physical port to maintain it.
Are the devices in your lab not interconnected ? will they not have IP connectivity ?
NTP does not require dedicated interfaces - it simply transmits UDP traffic using UDP port 123
Back to the basics ....... Thank you Merv.
If you enable ntp on your router, it automatically becomes a ntp time-server.
Regards
snipped-for-privacy@yahoo.com wrote:
Have something to add? Share your thoughts — no account required.
Ask the community — no account required