[j-nsp] [c-nsp] NTP Sources placement in MPLS network

[Saku Ytti]

On (2013-11-19 18:01 -0500), Yham wrote:

> Do you really think enabling NTP service on routers can burdening them. I
> mean in hierarchical way where RR and directly connected with ntp sources
> and then all PEs use RR as ntp master and CEs further down use PEs as NTP
> master?

It'll probably work just fine for good number of clients, but if you care
about accuracy, it's not going to be good choice.
You can easily test this, add one router as your NTP peer to your linux box,
and check in 'ntpq -p' what your 'jitter' is, it's likely order of magnitude
more than from dedicated server. WE're seeing jitter of 0.0Nms from our
dedicated NTP servers (They don't do HW timestamping, which would further
reduce the jitter)

-- 
  ++ytti