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A comprehensive set of Management Information Bases (MIBs) is provided for the service provider to collect traffic
information on the Cisco Catalyst 3550 Series for various billing methods.
Product Features and Benefits
Feature Benefit
Service Breadth
Layer 2 and Layer 3 VPN services • 802.1Q tunneling expands VLAN space by using a VLAN-in-VLAN hierarchy,
and tagging the tagged packets. The 802.1Q tunneling feature enables
service providers to use a single VLAN to support customers who have
multiple VLANs, while preserving customer VLAN IDs and segregating
traffic from different customers within the service provider infrastructure
even when they appear to be on the same VLAN.
• Multi-VRF CE (VRF-lite) forms virtual packet-forwarding tables by
associating one or more Layer 3 interfaces with each VRF, allowing the
creation of multiple Layer 3 VPNs on a single Cisco Catalyst 3550 Series.
Interfaces in a VRF could be either physical, as inan Ethernet port, or logical,
as in a VLAN switch virtual interface (SVI)—requires Enhanced Multilayer
Software Image (EMI).
Voice and video services • Protocol-Independent Multicast (PIM) for IP multicast routing within a
network enables the network to receive the multicast feed requested and
allows switches not participating in the multicast to be pruned—support for
PIM sparse mode (PIM-SM), PIM dense mode (PIM-DM), and PIM
sparse-dense mode—requires Enhanced Multilayer Software Image (EMI).
• Distance Vector Multicast Routing Protocol (DVMRP) tunneling for
interconnecting two multicast-enabled networks across
non-multicast networks—requires Enhanced Multilayer Software
Image (EMI).
• IGMP filtering provides control of the set of multicast groups to which a user
on a switch port can belong.
• Voice VLAN (auxiliary VLAN) support for VoIP application allows the
creation of data and voice VLANs on the same physical port.
• Cisco Group Management Protocol (CGMP) server functionality enables a
switch to serve as the CGMP router for CGMP client switches—requires
Enhanced Multilayer Software Image (EMI).
• IGMP snooping allows fast client “joins” and “leaves” of multicast streams
and limits bandwidth-intensive video traffic to the requestors.
• Web Cache Communication Protocol (WCCP) enables integration of cache
engines into the network infrastructure. The cache engines transparently
store frequently accessedcontent and then locallyfulfill successive requests
for the same content, eliminating repetitive transmissions of identical
content to web servers. Cache engines accelerate content delivery and
ensure maximum scalabilityand availability ofcontent. In aservice-provider
network, WCCP and cache engine solution can be deployed at the points of
presence (POPs)—requires Enhanced Multilayer Software Image (EMI).
(28 pages)
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