Table 8-2 Logical Port Parameters

Parameter

Valid Values

Default Value

 

 

 

 

 

 

Default Packet Size

16–4096 4

128

Maximum Window Size

2–7

7

 

 

 

Default Window Size

1–7

2

 

 

 

Maximum Throughput Class

see explanation

none

 

 

 

Default Calling Address

0–15 characters

none

 

 

 

T20 Restart Timer (sec)

1–600

60

 

 

 

T21 Incoming Call Timer (sec)

1–600

180

 

 

 

T22 Reset Timer(sec)

1–600

60

 

 

 

T23 Clear Tim er (sec)

1–600

60

 

 

 

DTE Restart Retry Count

0–99

0

 

 

 

DTE Reset Retry Count

0–99

0

 

 

 

DTE Clear Retr y Count

0–99

0

 

 

 

CUG Parameters

 

 

 

 

 

Pr eferential CUG Flag

Y/N

N

 

 

 

Pr eferential CUG

0–99

0

 

 

 

Incoming Access Allowed

Y/N

N

 

 

 

Outgoing Access Allowed

Y/N

N

 

 

 

Add/Change CUG

See explanation

n/a

 

 

 

Display All CUGs

See explanation

n/a

 

 

 

Delete CUG

See explanation

n/a

 

 

 

1Once this parameter has been selected for the first time, 1 becomes the default value.

21–7if modulo 8, 1–127if modulo 128. Changing this parameter will disable the link only if the new value changes the modulus.

30 means the parameter is not used.

4Maximum Packet Size values are 128, 256, 512, 1024, 2048, & 4096. Default Packet Size values are all of the above plus 16, 32, & 64. If X.25 will be run over this port, do not configure a size greater than 2048. If 4096 is specified, additional X.25 and frame headers can make the frame too large.2048 will not cause a problem, since larger frames will simply be split, then re-assembled at the destination.

Mapped DLCI Number

is the Data Link Connection Identifier, which links the logical port to a logical con- nection on the physical frame relay port. It must match the DLCI configured on the device at the other end of the local (rather than end-to-end) connection.

Make sure no more than one of any interface type (logical port, frame relay IP/IPX/LLC2 interface, or frame relay Bridge port) is assigned the same DLCI.

Also make sure this DLCI is not configured as a Frame Relay Backup DLCI or as part of an intra-nodal frame relay PVC.

Blocked Port Flag

causes the logical port to be disabled (Y) or enabled (N) (only if the physical port is also enabled) at node IPL. The port will remain in that state until this parameter is changed or an on-line enable ([B], [B], [C] from the Main Menu) or disable ([B], [B], [A] from the Main Menu) is performed.

8-14

SmartSwitch 1800 4. 0 User Guide, Rev 01

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Cabletron Systems 1800 manual Mapped Dlci Number
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1800 specifications

Cabletron Systems, a leading player in network management and telecommunications solutions during the late 20th century, introduced several innovative products that played a crucial role in shaping enterprise networking. Among these were the Cabletron FRX6000, FRX4000, and the FRX1800, which delivered advanced features aimed at enhancing network performance, security, and scalability.

The Cabletron FRX6000 was designed as a robust multi-layer switch, ideal for large-scale enterprise environments. It supported extensive routing capabilities, allowing organizations to manage traffic efficiently even under heavy loads. The FRX6000 boasted high throughput rates and low latency, making it suitable for demanding applications. With support for various network protocols, including IP, IPX, and AppleTalk, its adaptability made it a versatile choice for diverse networking needs. Moreover, security features like VLAN support and Access Control Lists (ACLs) provided enhanced protection against potential threats.

Moving to the FRX4000, this model offered a balance between performance and cost-effectiveness. The FRX4000 maintained many of the essential features of its larger counterpart while catering to medium-sized enterprises. It provided Layer 3 routing and could handle multiple simultaneous connections, ensuring seamless communication across departments. The modular design allowed for easy upgrades, enabling businesses to expand their network infrastructure without significant overhauls. This made the FRX4000 an attractive option for organizations looking to optimize their network investments.

Lastly, the FRX1800, designed for small to medium businesses, focused on simplicity and ease of use while still incorporating powerful network management capabilities. Its user-friendly interface made it accessible for organizations lacking extensive IT resources. The FRX1800 provided essential functionalities such as Integrated Layer 2 switching and routing, network monitoring, and basic security features, ensuring that even smaller companies could maintain efficient, reliable networking without overwhelming complexity.

All three models utilized advanced technologies, including a high bandwidth backbone and state-of-the-art switching architecture, to enable fast and reliable data transfer. They also supported Quality of Service (QoS) mechanisms, allowing businesses to prioritize critical applications and ensure consistent performance across the network.

In summary, the Cabletron FRX6000, FRX4000, and FRX1800 were pivotal in enhancing network capabilities, providing organizations with scalable, secure, and high-performance options tailored to their specific needs.
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