INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

CUCM Maximum Node Separation Distance

CUCM Maximum Node Separation Distance

(OP)
We know that the servers in a CUCM cluster must not have more than a 40msec communication delay between them (80msec round trip). With only transmission delay present, the Cisco SRND puts an upper limit separation distance of 3,720 miles, but warns that in practice this will be much less due to equipment introduced delays (buffers, etc.).

What sort of equipment introduced delays should be expected on MPLS links?

If maximum equipment delay is unpredictable and varies considerably, are there any conservative approaches (e.g. keep distance less than 2,000 miles, etc.)?

RE: CUCM Maximum Node Separation Distance

I think you will find it is usable if your round trip is in spec. Distance has little to do with it. A short distance can give you issues if the route is not fast enough, or there are enough interruptions to the flow to slow it down, ie routers switches etc at both ends of your route, plus the telco eqipment and even the bandwidth available. The bottom line is to ping it if you can and see what your time is for the round trip.

RE: CUCM Maximum Node Separation Distance

(OP)
Delay through fiber is approx. 8 millisconds per thousand miles. At, for example, 3,000 miles separation, there is a built-in 24ms delay. That leaves 16ms for equipment. Also, delay guarantees in service provider SLA's don't seem to encourage node separation either.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!

Resources

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close