Cisco security access control lists (ACLs), multicast management, and high-performance IP routing梬hile maintaining the simplicity of traditional LAN switching. Embedded in the Catalyst 3550 Series is the Cisco Cluster Management Suite (CMS) Software, which allows users to simultaneously configure and troubleshoot multiple Catalyst desktop switches using a standard Web browser. Cisco CMS Software provides new configuration wizards that greatly simplify the implementation of converged applications and network-wide services.
Basic 3524XL Stats:
10Gbps Switching Fabric, 5Gbps Forwarding Rate, 6.5 million packets-per-second 4mb Shared Memory for Layer 2 switching, Storage of 8,192 MAC addresses
Basic 3550-24-EMI Stats:
8.8Gbps Switching Fabric, 4.4Gbps Forwarding Rate, 6.6 million packets-per-second 2mb Shared Memory shared by all ports, 64mb RAM / 16mb Flash, Storage of 8,000 MACs, 16,000 Unicast Routes, 2,000 Multicast Routes, Max MTU 1546 for MPLS bridging.
What is the difference between the SMI and EMI 3550 Switches?
The Cisco Catalyst 3550-24, 3550-48, and 3550-24 PWR switches can be ordered with the SMI or the EMI. The Catalyst 3550-24-DC and 3550-24-FX can only be ordered with the SMI pre-installed, but as with all switches running the SMI, they can be upgraded to the EMI version using an EMI upgrade kit. The Cisco Catalyst 3550-12T and 3550-12G switches come installed with EMI. The EMI enables a richer set of enterprise-class features including, advanced hardware-based IP unicast and multicast routing, and the Web Cache Communication Protocol (WCCP).
You can also configure the SMI image to perform Layer 3 Routing. There is support for basic IP unicast routing via Static and RIPv1/v2 using the SMI image. The EMI image provides advanced IP unicast and multicast routing. These advanced routing protocols are Open Shortest Path First (OSPF), Interior Gateway Routing Protocol (IGRP), Enhanced Interior Gateway Routing Protocol (EIGRP), Border Gateway Protocol version 4 (BGPv4), and Protocol Independent Multicast (PIM).
Both the SMI and the EMI allow for Layer 3 and Layer 4 lookups for QoS and Security.
The following features and functionality are only supported with the EMI:
- Advanced IP routing protocols for load balancing and constructing scalable LANs (OSPF, IGRP, EIGRP, BGPv4)
- WCCP to allow switch interaction with a cache for the purpose of redirecting content requests to a cache and performing basic load balancing across multiple caches
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