Cisco AS5400HPX Manual de usuario descargar pdf (Pagina 2)

Redundant AC or DC powersupplies are provided with

a mean time between failure (MTBF) of over 1,000,000

hours. Each power supply has redundant fans as well as

internal protection features. Operational parameters are all

monitored via internal sensors to the power supplies, and

alarm status is provided to the system. Power-supply

configuration adjusts automatically to system changes,

allowing systems operations to continue without

interruption.

Threeredundant methodsare includedby default onthe

Cisco AS5400 that can be used to backhaul trafﬁc from the

server to the network. The ﬁrst method uses the two Fast

Ethernetports.These can beconﬁguredtorun differenttypes

of trafﬁc on each link or use the Hot Standby Router

Protocol (HSRP) in a redundant mode for increased

reliability. The second method utilizes the two 8-MB serial

ports. These ports support all of the Cisco serial routing

protocols for ﬂexibility in connecting to remote networks.

The third method is achieved by usingone ormore of the T1/

E1 trunks for backhaul instead of inbound calls. This can be

done on either the T1/E1 cards or the CT3 card with part of

the T3 provisioned for inbound and part for backhaul.

The Cisco AS5400 chassis provides four high-capacity

fans with front-to-back airﬂow that cool the chassis when

fully loaded. Thermal sensors monitor the inlet and outlet

temperatures and temperature rise across each card. If the

operating temperature of the system exceeds its maximum,

the thermal sensors initiate a shutdown of the dial feature

cards (DFCs), starting with the modem cards and finishing

with the trunk cards. The trunk cards are shut down last, so

the system has a chance to recover before putting the trunks

into alarm status at the central office. If the system continues

to exceed its maximum operating temperature, the thermal

sensors initiate a shutdown, preventing damage to the unit

andprotecting itssurrounding environmentfrom excessheat.

NEBS/ETSI Regulatory Compliance

The Cisco AS5400 complies with Network Equipment

Building System (NEBS) Level 3 requirements, as deﬁned

by Telcordia SR-3580 and European requirements by the

European Telecommunication Standards Institute (ETSI).

Rich Protocol Support

The Cisco AS5400 takes advantage of the full-feature

richness and strong routing capabilities of Cisco IOS

software. The Cisco AS5400 can be deployed in a variety

of architectures, from multiprotocol corporate networks to

service-provider IP networks. In addition, the Cisco AS5400

fully supports the specializedneeds of AOL, MSN, andother

content-oriented dialup services through Point-to-Point

Protocol (PPP), Layer 2 Tunneling Protocol (L2TP) or

“TCP-Clear” connections.

Manageability

The Cisco AS5400 has a wide range of console and Simple

Network Management Protocol (SNMP) management

tools designed to reduce operations costs. The console

management features include a comprehensive set of

debugging commands that can be enabled on a speciﬁc

calling line identiﬁcation (CLID) or automatic number

identiﬁcation (ANI), called number dialed-number

identiﬁcation string (DNIS), per user or per interface to

immediately isolate only the relevant debugging output.

The SNMP management capability includes a rich

call-tracking SNMP Management Information Base (MIB)

that provideshighly detailed records for active and historical

calls, with a conﬁgurable call historybuffer. Call records can

also be obtained via syslog or Remote Access Dial-In User

Service(RADIUS) asan alternative topolling viaSNMP. Call

records include modem connect rate, connect duration,

disconnect codes, end-to-end delay, and line statistics. This

informationallows serviceproviders(SPs)todebugproblems

for individual users. Wholesale dial SPs can use this

performance management data to establish service-level

agreements (SLAs) with their retail ISP customers.

Security Management

Cisco IOS software security features allow authorized users

dial access while preventing access to intruders. These features

include: multilevel password protection, user authentication

suchasPasswordAuthenticationProtocol(PAP)andChallenge

Handshake Authentication Protocol (CHAP), access control

lists (ACLs), IP address spoofing prevention and logging, and

support ofthe industry-standard authentication,authorization

and accounting (AAA) protocols, RADIUS, and Terminal

Access Controller Access Control System (TACACS+).

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