Bridge Node Default Parameters

Table 16-1 Bridge Node Default Parameters

Parameter	Valid Values		Default Value


Virtual LAN ID	n/a – accept the default

Bridge Enabled	Y/N		Y

Bridge Hello Time	1–10	(seconds) 1	2
Bridge Max Age	6–40	(seconds) 1	20
Bridge Forward Delay	4–30	(seconds) 1	15
Bridge Aging Timer	10–10000000 (seconds)		300

Bridge Priority	0–65535		32768

Max Size Bridge For warding Table	128–65535		32768

IP Bridging Enabled	Y/N		N

IPX Bridging Enabled	Y/N		N

SRB ID	0–f(hex)		0

Default Ethernet Frame Type 2	Type II, 802.3		Type II

1To assure correct operation of the spanning tree algorithm, follow these rules:

a.Bridge Max Age must be less than or equal to twice the value of {Bridge Forward Delay minus 1 second}.

b.Bridge Max Age must be greater than or equal to twice the value of {Bridge Hello Time plus 1 second}.

2This parameter is irrelevant on a a Token Ring SmartSwitch 1800.

Bridge Enabled

enables bridging in the node, implementing the spanning tree algorithm.

If Bridging is disabled, all Bridge ports on the node will go into Forwarding state (described under "Bridge Port Status" on page 20-22). No BPDUs (see Bridge Hello Time below) will flow. No data will be bridged except termi- nated LLC2 traffic.

Bridge Hello Time

is the frequency with which all bridges on the network will send "Hello" messages (also called BPDUs, or Bridge Protocol Data Units) to adjacent bridges (the next ones in all bridge paths) when the local bridge is "Root ." Note that a root bridge is the one with the lowest ID (which contains its Bridge Priority and MAC address) on the network.

Bridge Max Age

determines how long Hello messages will remain valid when the local bridge is root (described under "Bridge Hello Time").

Bridge Forward Delay

is the time the bridge will wait after entering Listening state before entering Learning state, or after entering Learning state before entering Forwarding state This delay is intended to assure that the tree topology is stable before it is put into use.

The states are described under "Bridge Port Status" on page 20-22.

16-4	SmartSwitch 1800 4. 0 User Guide, Rev 01

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.

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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.

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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.