Cisco ME-C3750-24TE-M Manual de usuario descargar pdf (Pagina 9)

Feature Benefit

Intelligent Ethernet

Demarcation

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Industry standard OAM&P 802.1ag (CFM) feature supports end-to-end network monitoring and

troubleshooting. This greatly reduces OpEx for service providers by reducing the numbers of site visits

needed to troubleshoot network problems.

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E-LMI enables the service provider to automatically configure the customer-edge and CPE devices to match

the subscribed service.

Layer 2 VPN Service

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Standard 802.1Q Tunneling creates a hierarchy of 802.1Q tags. This feature helps service providers 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.

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Selective QinQ gives service providers more flexibility in segregating customer traffic in the network.

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L2PT allows for transport of the customers’ control protocols, thereby allowing for a true virtual-circuit service

across service providers’ shared infrastructure.

Layer 3 VPN Service

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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 3750 Metro Series

Switch. Interfaces in a VRF could be either physical, as in an Ethernet port, or logical, as in a VLAN switch

virtual interface (SVI) – requiring the METROIPACCESS Cisco IOS Software feature image.

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IP Multicast support in Multi-VRF CE allows customers to migrate to Multi-VRF CE without affecting

application and services that depend on IP Multicast.

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VRF-aware services (ARP, Ping, SNMP, HSRP, uRPF, Syslog, Traceroute, FTP, and TFTP).

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Support for multiple IP routing protocols (RIPv1/v2, EIGRP, OSPF, IS-IS, and BGPv4) offers flexible options

for peering between end customers and service providers.

Availability and Scalability

Superior Redundancy for Fault

Backup

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IEEE 802.1w Rapid Spanning Tree Protocol (RSTP) provides rapid spanning-tree convergence independent

of spanning-tree timers and offers the benefit of distributed processing.

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Per-VLAN Rapid Spanning Tree (PVRST+) allows rapid spanning-tree reconvergence on a per-VLAN

spanning-tree basis, without requiring the implementation of spanning-tree instances.

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Cisco Hot Standby Router Protocol (HSRP) is supported to create redundant, fail-safe routing topologies.

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Unidirectional Link Detection Protocol (UDLD) and Aggressive UDLD allow unidirectional links caused by

incorrect fiber-optic connections or port faults to be detected and disabled on fiber-optic interfaces.

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Flex-Link provides fast failover of ports without overhead of control protocols such as the Spanning Tree

Protocol.

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VLAN Flex-Link Load Balancing provides high availability and load balancing based on VLAN.

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Switch-port autorecovery (errdisable) automatically attempts to reactivate a link that is disabled because of a

network error.

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Equal-cost routing provides for load balancing and redundancy.

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Bandwidth aggregation up to 800 Mbps through Cisco Fast EtherChannel

technology enhances fault

tolerance and offers higher-speed aggregated bandwidth between switches and to routers and individual

servers.

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Accelerate Layer 3 reconvergence through the use of Link-State Tracking by taking down associated

downstream ports when all the corresponding upstream ports are down. Customer switches that are

connected to the downstream ports can then take the appropriate failover action.

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Resilient Ethernet Protocol (REP) provides fast Layer 2 reconvergence in a ring network and offers an

alternative to Spanning Tree Protocol.

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Pseudowire redundancy enables service providers to configure their Multiprotocol Label Switching) MPLS

network to detect a failure in the network and reroute Layer 2 service to another endpoint that can continue to

provide service.

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