Multi-Protocol Label Switching (MPLS) Conformance and ... - Ixia

IxScriptMate VPLS MAC Address Cache Capacity TestObjective: To determine the maximum capacity of a router’s Layer 2 MAC address cache.Test setup: A minimum of three Ixia test ports connected to the DUT — a Test port, aMonitoring port, and a Learning port.Parameters: Number of PEs per port, number of VPLS instances per CE, number of hostsper VLAN, DUT MAC address table size, DUT MAC address aging time. (See Figure 13.)Methodology:1. OSPF and LDP are run based on user-configured parameters to set up the networktopology and signal the VPLS instances.2. Learning frames, equal in number to the specified DUT MAC address table size, aresent to the Learning port. These frames contain varying source MAC addresses anda fixed destination MAC address corresponding to the address connected to the Testport.3. Validation frames are sent to the Test port back to the addresses learned on theLearning port.4. The Monitoring port listens for flooded or mis-forwarded frames from the DUT.5. A binary search algorithm is used to determine the maximum number of addressesthat can be learned without flooding or dropping frames.Results: Maximum MAC address capacity total and per VPLS instance. (See Figure 14.)Figure 13. IxScriptMate run setup27