![]() The SIP card supports the ingress packet classification and buffering in order to allow for oversubscription. Traffic received on a 10 Gig and transmitted out on a Gig interface.Traffic received on two Gig interfaces and transmitted out on one Gig interface.High Bandwidth Ingress Interface(s) and Low Bandwidth Egress Interface(s) The next section provides the Command Line Interface (CLI) that detect if the router is hit by one of these scenarios. Three scenarios which can cause packet loss on an ASR1000 series router are explained in this section. Miscalculation of the Router capacity for the hardware configuration in use (ESP and SIP combination) can lead to network designs where the ASR1000 series router fails to forward packets at line rate. The aggregate bandwidth capacity of the SIP determines how much traffic is sent to and from the ESP. The Shared Port Adaptors (SPA) which receives packets from the line or send packets out on to the line is connected to ESP card though a carrier card called SPA Interface Processors (SIP). The ESP module in the chassis determines the forwarding capacity of the router. ![]() The centralized forwarding card is called the Embedded Service Processor (ESP). ProblemĪSR1000 series router platform is a centralized router platform which means all the packets received by the router have to reach a centralized forwarding engine before it can be sent out. Refer to Cisco Technical Tips Conventions for more information on document conventions. If your network is live, make sure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. ![]()
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