Imran, If the interface is only used for the ISP then you want to look at the interface bandwidth. You can also look at the subinterface bandwidth as well as the GRE tunnel interface. The GRE tunnel interface is most likely what the ISP is applying policing against.
If you are applying QoS policy for either marking, policing or shaping that is good but the stats from interface snmp monitoring will be more accurate. I do not necessarily disagree with your analysis of the performance but most of the ISP that I have completed performance testing on do not overprovision a circuit so Layer 3 data throughput achieved is greater than equal to the circuit ordered. Most ISPs apply policing after the L2,L3 encapsulation such as GRE or more popular now MPLS. So if you performance test the circuit using a bandwidth tool like iperf or a true speed meter like JSDU TBerd then your L1 bandwidth will get reduced once the L2 and L3 headers are added. Message: 1 Date: Mon, 15 Jul 2013 00:06:38 +0300 From: Imran Ali <[email protected]> To: [email protected] Subject: [OSL | CCIE_RS] qos question Message-ID: <CAH7EgzcQOoYyPGArP2wFKh40f8AjGaRBVJZs=ji0a_pcxls...@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Hi all, we have an isp connection with a dot1q connection on our 3845 series router. But internet is provided via a gre tunnel . so main interface is a " sub interface " and internet traffic is defaulting to GRE what i need is to measure the rate of incomming traffic from internet ... where should i apply my METERING qos polciy ? on dot1q subinterface or on GRE ? 2) do i need to do "pre calssify " on gre ? the reason i need to know this because we assume that isp is not servcicing the contract properly and has configured polcing below CIR . HOW do you catch isp's in such cases ? thing of very small isp _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
