Quidway AR 28 Series Routers Installation Manual Chapter 1 Overview
Huawei Technologies Proprietary
1-3
medium-to-small-sized enterprises to access the Internet over DSLAM equipment via
PSTN.
MPLS, a combination of IP and ATM technologies, replaces the traffic identified by IP
header with a short and length-fixed label, based on which a router makes the
forwarding decision. It can provide faster forwarding speed, get support from IP routed
protocols, and control protocols, thus satisfying the requirements that various new
applications put on the network. MPLS VPN is a VPN technology that implements the
interconnection of private networks via Label Switched Paths (LSPs). As LSP is a
tunnel across the public network on its own, MPLS has an inherent advantage in terms
of VPN implementation. AR 28 Series Routers usually act as Label Edge Routers
(LERs) to implement service classification, label distribution, encapsulation, and
multi-label peel-off by connecting an MPLS domain to a non-MPLS domain or
connecting MPLS domains of different service providers.
VII. Data security
z Supports ID authentication protocols, including PAP (Password Authentication
Protocol), CHAP (Challenge Handshake Authentication Protocol), RADIUS
(Remote Authentication Dial in User Service), TACACS+.
z Implements firewall to prevent invasions from external networks.
z Supports VPN (Virtual Private Network, including GRE, L2TP) and provides IPSec
(IP Security) and IKE (Internet Key Exchange) technologies. Hence, the security
of the user private network in the Internet environment can be guaranteed.
z Provides backup solutions based on the backup center technology.
VIII. Online software upgrade
512 KB Boot ROM and 32 MB Flash memory provide the user with adequate physical
carrier to upgrade the software online, add new features, and extend new functions
according to market demands.
IX. Chassis
Quidway AR 28 Series Routers adopt integrated structure design. They perform
excellently on heat dissipation, EMC (Electromagnetic Compatibility) and safety.
1.2 Slots
The following table shows the numbers of interfaces and slots on Quidway AR 28
Series Routers:
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