Cisco C8510-SRP - Switch Route Processor Instrukcja Użytkownika Pobierz pdf (Strona 20)

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Integrated Local Management Interface (ILMI) 4.0 • Across UNI and PNNI or IISP Facilitates network-wide autoconﬁguration; for

example, through address registration and UNI/PNNI

version negotiation; includes address scope indication

and PVC parameter discovery, detects change of

attachment points when there are moves across the

UNI, and facilitates IISP link autoconﬁguration and

topology discovery

Full, ATM Forum-Compliant PNNI Support • Default PNNI image license supports single level of

hierarchy, where multiple peer groups can be

interconnected by IISP or by other switches that

support full PNNI hierarchy; extra PNNI image

license will support multiple levels of routing

hierarchy

Support for ATM Forum speciﬁcation for scalable,

QoS-based ATM routing and switch-to-switch SVC

interoperability

IISP Support • Included in all software images/licenses Allows backward compatibility with switches not yet

implementing ATM Forum-compliant PNNI

VP Tunneling • Maps signaling channels and user connections into

logical VP tunnels

Allows signaling as well as user connections to be

tunneled across public networks that do not support

SVCs

Soft PVCs/PVPs • Automates setup of PVCs or PVPs across network

using signaling protocols

Eases setup of PVCs or PVPs and allows for automatic

rerouting of soft PVCs or PVPs

Soft PVC/PVP Continuous Route Optimization • Used to reroute or redistribute soft PVC/PVP

connections when better routes are available after

failed links have healed

Optimizes network utilization of soft PVC/PVP

connections; how aggressive or nonaggressive the

rerouting or redistribution proceeds is conﬁgurable to

avoid oscillation connection rerouting found in other

implementations

PNNI Closed User Groups (CUGs) • Provides ability to construct ATM-layer virtual

private networks (VPNs)

Supports multiple user networks spread out over the

same infrastructure, when they must be securely

separated, across both UNI and PNNI

ATM Access Lists • Allows ﬁrewalls based on ATM address ﬁelds within

ATM signaling and ILMI registration

Control over access to a network across particular

links or between hosts, for example; also intrusion

protection is provided via ILMI ﬁrewalls; all these can

be set to vary on a time-of-day basis

Conﬁgurable “well-known” VCs for signaling, ILMI, or

PNNI

• Allows for the custom conﬁguration of nondefault

well-known VCs

Useful for service providers who offer SVC service

and need multiple/numerous signaling channels

Anycast Support • Optional feature of UNI Signaling 4.0 Anycasting is based on new ATM services that use

group addresses, where the group address may be

shared among multiple end systems; the group address

may represent a particular service, such as a

conﬁguration or name server

Peak and Minimum Cell Rate (PCR/MCR) Negotiation • Optional feature of UNI Signaling 4.0 Provides quicker connection setup when the original

request for PCR or MCR cannot be met because of the

lack of resources or policy constraints

E.164 <--> ATM NSAP Address Translation • Many public ATM networks and ATM-attached PBX

devices use E.164 addressing

Allows private networks to be attached to public ATM

networks at the CPE demark

Plug-and-Play Operation • Uses preconﬁgured Cisco ATM address preﬁxes Precludes need for users to obtain ATM addresses for

private networks and permits rapid setup

Redundant PNNI Links • Support for parallel links using load-balancing or

best-ﬁt algorithms

Enhances link and network utilization and increases

system uptime

Microsoft Corporation Proprietary Funnel Join (or Flow

Merge) Protocol

• Used to support Microsoft's NetShow Theater

application for high-quality video broadcast; merging

is only over the UNI

Improves scalability of this video-on-demand system

Rich ATM Trafﬁc Management Mechanisms

Multiple Priorities for Queuing and Scheduling • Supports all ATM Forum trafﬁc classes and AAL

types

Supports all trafﬁc types and allows for QoS on

demand

Table 8 Catalyst 8500 ATM Switching-Speciﬁc Features and Beneﬁts

Feature Comment/Description Beneﬁt

1 2 ... 15 16 17 18 19 20 21 22

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