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The Marlin Network Access Servers’

IPX implementation provides increased

network security and reduced overhead

trafﬁc through its IPX RIP and SAP

Direction Control feature.

Frame Relay Bay Networks NauticaRS

Frame Relay support allows remote access

to corporate networks or the Internet over

public or private Frame Relay networks.

Marlin Network Access Servers can sup-

port up to 64 PVCs over a Frame Relay

network. This Frame Relay implementa-

tion supports RFC1490 encapsulation,

ensuring multivendor interoperability

over Frame Relay for IP/IPX routing and

transparent bridging.

PPP and Multilink PPP Industry-standard

Point-to-Point Protocol (PPP) and RFC

1990 — Multilink PPP (MP) — are sup-

ported for multivendor interoperability

over ISDN and leased lines. PPP and MP

are enhanced by the Marlin Network

Access Servers’support of Point-to-Point

Tunneling Protocol (PPTP),Bridge

Control Protocol (BCP),and Bandwidth

Allocation Control Protocol (BACP),

which extend connectivity, ensure ade-

quate bandwidth,and provide security.

PPTP allows PC users to extend the PPP

connection over a composite path of LAN

and ISDN links. An extension of PPP,

PPTP supports virtual private networks

(VPNs) and provides branch ofﬁce and

remote/mobile users low-cost access to

corporate network resources via a secure

Internet connection. This eliminates long

distance charges as well as management

and security issues associated with main-

taining private networks. BCP allows

non-routed protocols such as AppleTalk

to be bridged over a PPP link to any

other router or bridge supporting the

PPP/BCP standard.

Bandwidth Allocation Control Protocol

(BACP) manages the bandwidth available

during Multilink calls. Via BACP, a plat-

form not initiating the call has the ability

to negotiate bandwidth with the platform

initiating the call. The negotiation can be

based on available resources or through

the dynamic monitoring of the actual traf-

ﬁc across the link. This solves the problem

of insufﬁcient bandwidth, which often

occurs when ISDN links are repeatedly

initialized and brought down (thrashing),

by ensuring that both ends have adequate

bandwidth for operation.

Data Compression

NauticaRS software enables the Marlin

Network Access Servers to increase the

amount of data that can be carried across

an ISDN or leased line. Bay Networks

routers provide the most comprehensive

data compression support in the industry.

This support ensures compression inter-

operability with a wide array of remote

environments,ranging from third-party

routers to Microsoft Windows worksta-

tions. Marlins use Lempel-Ziv-based

STAC data compression techniques and

support RFC 1962 — Compression

Control Protocol (CCP) — along with

Bay Networks WAN Compression

Protocol (WCP). Microsoft Point-to-

Point Compression (MPPC) is supported

to optimize throughput in customer-

speciﬁc applications. Bay Networks

data compression support improves

performance and throughput without

compromising compatibility by using

standards-based techniques.

Dial Services

Remote ofﬁce connectivity and availability

is ensured via NauticaRS dial-up services

support, which includes Dial-on-Demand,

Bandwidth-on-Demand,and Dial Backup

for the Marlin Network Access Servers.

Data Sheet Marlin Network Access Servers 5

NauticaRS Protocol Implementation

NauticaRS provides a comprehensive set

of standards-based IP,IPX,Frame Relay,

and PPP features and services.

IP NauticaRS provides all standard IP

functions and supports major Internet

Engineering Task Force (IETF) Request for

Comments (RFCs) for protocols including

IP, TCP,RIP,ARP, ICMP, UDP, DHCP,

BootP Relay, Dynamic RIP routing, and

static routes. This range of support

ensures users highly reliable,standards-

based connectivity and interoperability.

Marlin Network Access Servers’IP imple-

mentation provides increased network

security and reduced overhead trafﬁc

through its IP RIP Direction Control

feature. This feature controls the ﬂow

of broadcast trafﬁc over the network.

Broadcast trafﬁc generated by IP RIP can

be conﬁgured as send only,receive only,

both,or neither on a per-path basis.

NauticaRS also allows static routes to be

“blacklisted”to allow DADS to be sup-

ported for dynamic and static routing

table entries. This provides greater

resilience in a meshed ISDN environment.

IPX The Marlin Network Access Servers’

IPX implementation supports LSAP/LLC2,

SNAP,and Novell Proprietary protocol.

RIP routing is also supported to ensure

that the best path to a destination is used.

Additionally, the Marlin’s IPX Default

Route feature enables packets to be sent to

an address that is not known in the Marlin

Network Access Servers’routing table.

Bay Networks also reduces trafﬁc on

the network through its SAP and SPX

spooﬁng support.

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