nanog mailing list archives
RE: Network SLA
From: "Andreas, Rich" <Rich_Andreas () Cable Comcast com>
Date: Wed, 11 Mar 2009 16:20:49 -0400
I have found that Cisco IPSLA is heavily used in the MSO/Service Provider Space. Juniper has equivalent functionality via RPM. Rich -----Original Message----- From: Saqib Ilyas [mailto:msaqib () gmail com] Sent: Saturday, March 07, 2009 6:12 AM To: nanog () nanog org Subject: Re: Network SLA I must thank everyone who has answered my queries. Just a couple more short questions. For instance, if one is using MRTG, and wants to check if we can meet a 1 Mbps end-to-end throughput between a couple of customer sites, I believe you would need to use some traffic generator tools, because MRTG merely imports counters from routers and plots them. Is that correct? We've heard of the BRIX active measurement tool in replies to my earlier email. Also, I've found Cisco IP SLA that also sends traffic into the service provider network and measures performance. How many people really use IP SLA feature? Thanks and best regards On Mon, Feb 23, 2009 at 1:19 PM, Zartash Uzmi <zartash () gmail com> wrote:
As I gather, there is a mix of answers, ranging from "building the
resources
according to requirements and HOPE for the best" to "use of arguably sophisticated tools and perhaps sharing the results with the legal department". I would be particularly interested in hearing the service providers' viewpoint on the following situation. Consider a service provider with MPLS deployed within its own network. (A) When the SP enters into a relation with the customer, does the SP establish new MPLS paths based on customer demands (this is perhaps
similar
to "building" based on requirements as pointed out by David)? If yes, between what sites/POPs? I assume the answer may be different
depending upon
a single-site customer or a customer with multiple sites. (B) For entering into the relationship for providing X units of
bandwidth
(to another site of same customer or to the Tier-1 backbone), does the
SP
use any wisdom (in addition to MRTG and the likes)? If so, what
scientific
parameters are kept in mind? (C) How does the customer figure out that a promise for X units of
bandwidth
is maintained by the SP? I believe customers may install some
measuring
tools but is that really the case in practice? Thanks, Zartash On Fri, Feb 20, 2009 at 1:16 AM, Stefan <netfortius () gmail com> wrote:Saqib Ilyas wrote:Greetings I am curious to know about any tools/techniques that a service
provider
uses to assess an SLA before signing it. That is to say, how does an administrator know if he/she can meet what he is promising. Is it
based on
experience? Are there commonly used tools for this? Thanks and best regardsNot necessarily as a direct answer (I am pretty sure there'll be
others on
this list giving details in the area of specific tools and
standards), but I
think this may be a question (especially considering your end result concern: *signing the SLA!) equally applicable to your legal
department. In
the environment we live, nowadays, the SLA could (should?!? ... unfortunately) be "refined" and (at the other end - i.e. receiving) "interpreted" by the lawyers, with possibly equal effects (mostly
financial
and as overall impact on the business) as the tools we (the technical people) would be using to measure latency, uptime, bandwidth, jitter,
etc...
Stefan
-- Muhammad Saqib Ilyas PhD Student, Computer Science and Engineering Lahore University of Management Sciences
Current thread:
- Re: Network SLA Saqib Ilyas (Mar 07)
- Re: Network SLA Chris Meidinger (Mar 07)
- Re: Network SLA Joe Provo (Mar 07)
- RE: Network SLA Holmes,David A (Mar 09)
- Re: Network SLA Charles Wyble (Mar 09)
- RE: Network SLA Andreas, Rich (Mar 11)
- Re: Network SLA Athanasios Douitsis (Mar 13)
- Re: Network SLA Saqib Ilyas (Mar 18)
- Re: Network SLA Chris Meidinger (Mar 18)
- Re: Network SLA Athanasios Douitsis (Mar 13)
- Re: Network SLA Chris Meidinger (Mar 07)