How many Virtual Circuits (VCS) can support a service policy simultaneously?
A. The following document provides useful guidelines on the number of Asynchronous Transfer Mode (ATM) VCS that can support. About 200 to 300 VBR-nrt Permanent Virtual Circuits (PVCs) have been safely deployed: • IP to ATM Class of Service Design Guide Also consider the following: • Use a powerful processor capable. For example, a VIP4-80 provides significantly higher performance than a VIP2-50. • Amount of available packe memory. On the NPE-400, up to 32 MB (in a system with 256 MB) is set aside for packet buffer. For an NPE-200, up to 16 MB is set aside for packet buffers on a system with 128 MB. • Configurations with per-VC Weighted Random Early Detection (WRED) operating simultaneously on up to 200 ATM PVCs have been extensively tested. The amount of packet memory on the VIP2-50 that can be used for the per-VC queues is finite. For instance, a VIP2-50 with 8-MB SRAM provides 1085 packet buffers available for IP to ATM COs per-VC queueing on which WRED operates. If 100 ATM PVCs were
