Cisco Systems BC-23 manual BC-79, Bridged Subnetworks with Domains

Page 57

Configuring Transparent Bridging

Transparent and SRT Bridging Configuration Examples

Figure 21 Bridged Subnetworks with Domains

Bridged Subnetwork

 

 

 

Domain 1

 

 

 

Domain 2

Bridged Subnetwork

 

 

 

 

 

 

 

To other

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

parts of BSN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E0

E1

 

E2

 

E3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

3

3

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F0

 

 

 

 

 

 

 

 

 

 

E1

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

Router A

 

 

 

 

FDDI

 

 

 

 

Router B

1

 

 

 

To other

 

 

 

 

 

 

 

 

 

 

 

F0

 

 

 

 

E2

 

 

 

 

1

1

 

 

 

 

 

 

 

 

 

 

 

1

 

parts of BSN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T1

 

T2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To other

 

 

 

 

 

 

Domain 3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

parts of BSN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F0

 

2

 

 

 

 

 

 

 

 

 

 

 

Bridged Subnetwork

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Router C

2 2 2

S0 S1 S2

Circuit group 7

Bridged Subnetwork

Circuit group 4

S2

S0 S1

5

5

5

 

Router D

 

 

5

5

 

E4

 

E5

 

 

 

 

 

 

 

 

To other

parts of BSN

S2322

For proper bridging operation, the bridged subnetworks cannot have connections between them, but they can be connected to the same backbone. In this example, three of the four bridged subnetworks are connected to the FDDI backbone and each belongs to a separate domain.

Domains used in this topology allow the bridged subnetworks to be independent of one another while still bridging traffic onto the backbone destined for other connected bridged subnetworks. Domains can be used in this manner only if the bridged subnetworks have a single point of attachment to one another. In this case, the connection to the FDDI backbone is that single point of attachment.

Each router on which a domain is configured and that has a single point of attachment to the other bridged subnetworks, checks whether a BPDU on the backbone is its own. If the BPDU does not belong to the bridged subnetwork, the Cisco IOS software ignores the BPDU.

Separate bridged subnetworks, as in this example, allow spanning-tree reconfiguration of individual bridged subnetworks without disrupting bridging among the other bridged subnetworks.

Cisco IOS Bridging and IBM Networking Configuration Guide

BC-79

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Page 56 Page 58
Contents BC-23 Transparent and SRT BridgingTransparent Bridging Features Integrated Routing and BridgingBC-24 BC-25 Bridge-Group Virtual InterfaceBridge-Group Virtual Interface in the Router BC-26SRT Bridging Features Other ConsiderationsBC-27 BC-28 Transparent and SRT Bridging Configuration Task ListAssigning Each Network Interface to a Bridge Group Configuring Transparent Bridging and SRT BridgingAs Ieee 802.1D standard, DEC or Vlan bridge BC-29Transparently Bridged VLANs for ISL Command PurposeChoosing the OUI for Ethernet Type II Frames BC-30Transparently Bridged VLANs on an Fddi Backbone BC-31BC-32 Routing between ISL VLANsSubinterface with the Vlan Specifies a subinterfaceSame bridge group BC-33Configuring Transparent Bridging over WANs Configuring a Subscriber Bridge GroupConfiguring Fast-Switched Transparent Bridging over ATM BC-34Command Configuring Transparent Bridging over DDRDefining the Protocols to Bridge Specifying the Bridging ProtocolDetermining Access for Bridging Configuring Transparent Bridging over Frame RelayConfiguring an Interface for Bridging Fast-Switched Transparent BridgingBridging in a Frame Relay Network with No Multicasts Configuring Transparent Bridging over Multiprotocol LapbBridging in a Frame Relay Network with Multicasts BC-37Configuring Transparent Bridging over Configuring Transparent Bridging over SmdsSpecifies IP-to-X.121 mapping BC-38Configuring Integrated Routing and Bridging Configuring Concurrent Routing and BridgingSpecifies a protocol to be routed on a bridge group BC-39Configuring the Bridge-Group Virtual Interface Configuring InterfacesEnabling Integrated Routing and Bridging BC-40BC-41 Configuring Protocols for Routing or BridgingConfiguring Transparent Bridging Options Disabling IP RoutingBC-42 Configuring LAT Compression Enabling Autonomous BridgingBC-43 Establishing Multiple Spanning-Tree Domains Establishes a multiple spanning-tree domainBC-44 Filtering Transparently Bridged Packets Configuring Bridge Table Aging TimeForwarding Multicast Addresses BC-45BC-46 Setting Filters at the MAC LayerFiltering by Vendor Code Filters particular MAC-layer station addressesEthernet-ordered MAC address BC-47Filtering by Protocol Type TypeBC-48 Configuration mode Defining and Applying Extended Access ListsInterface BC-49BC-50 Filtering LAT Service Announcements Enabling LAT Group Code Service FilteringBC-51 BC-52 Adjusting Spanning-Tree ParametersSetting an Interface Priority Setting the Bridge PriorityAdjusting Bpdu Intervals Assigning Path CostsDefining the Forward Delay Interval Adjusting the Interval between Hello BPDUsDisabling the Spanning Tree on an Interface Defining the Maximum Idle IntervalBC-55 BC-56 Configuring the PA-12E/2FE Port AdapterBC-57 Monitoring and Maintaining the PA-12E/2FE Port AdapterBC-58 BC-59 BC-60 Configuring Circuit GroupsConfigures a transmission pause interval Configuring Constrained Multicast FloodingDistributes base load on the source MAC address only BC-61BC-62 BC-63 Basic Bridging ExampleBC-64 Concurrent Routing and Bridging ExampleBC-65 Basic Integrated Routing and Bridging ExampleBC-66 Complex Integrated Routing and Bridging ExampleBC-67 Transparently Bridged VLANs Configuration ExampleRouter One Router TwoBC-68 BC-69 Router ThreeRouting between VLANs Configuration Example Ethernet-to-FDDI Transparent Bridging ExampleBC-70 Ethernet Bridging Example Router/Bridge in BuildingBC-71 BC-72 SRT Bridging ExampleConfiguration for the Thule, Greenland Router Configuration for the New York City RouterMulticast or Broadcast Packets Bridging Example BC-73Configuration for Bridge Transparent Bridging ExampleBC-74 Frame Relay Transparent Bridging Examples Bridging in a Frame Relay Network with No MulticastsBC-75 Transparent Bridging over Multiprotocol Lapb Example Bridging in a Frame Relay Network with MulticastsBC-76 BC-77 Transparent Bridging over DDR ExamplesFast-Switched Transparent Bridging over Smds Example Complex Transparent Bridging Network Topology ExampleBC-78 Bridged Subnetworks with Domains BC-79BC-80 Configuration for Router aConfiguration for Router C Configuration for Router BConfiguration for Router D BC-81Fast Ethernet Subscriber Port, Frame Relay Trunk Example ATM Subscriber Ports, ATM Trunk ExampleBC-82 BC-83 BC-84 Configuration of IRB for PA-12E/2FE Port Adapter Example

BC-23 specifications

Cisco Systems has long been a leader in the networking industry, and its BC-23 model exemplifies the company's commitment to innovation and performance. Aimed at enhancing business operations, the BC-23 is tailored for organizations looking for robust solutions that support their digital transformation efforts.

One of the standout features of the Cisco BC-23 is its advanced networking capabilities. It supports high-speed data transmission, enabling seamless communication across networks. With multi-gigabit Ethernet ports, the BC-23 facilitates faster data rates, accommodating the increasing bandwidth demands of modern applications. This feature is particularly beneficial for businesses that rely heavily on cloud services, video conferencing, and data-heavy applications.

Security is a top priority, and the Cisco BC-23 incorporates cutting-edge security measures. Integrated threat detection and prevention systems help safeguard sensitive data from cyber threats. Additionally, the device supports secure access protocols, ensuring that only authorized users can connect to the network. This multi-layered security approach not only protects the network infrastructure but also secures the integrity of the data being transmitted.

Another significant characteristic of the BC-23 is its support for software-defined networking (SDN). This technology allows businesses to manage their networks through centralized software applications, facilitating real-time adjustments and optimizations. The flexibility afforded by SDN is especially advantageous in dynamic environments where network demands can shift rapidly.

The Cisco BC-23 also offers enhanced management features, allowing IT teams to monitor network performance and analytics effectively. This visibility into network operations enables organizations to identify potential issues before they escalate, minimizing downtime and keeping business processes smooth.

Furthermore, the BC-23 is designed for scalability. As organizations grow, their networking needs evolve, and the BC-23 can easily adapt to these changes. Businesses can add additional devices and capabilities without the need for a complete overhaul of their existing infrastructure.

With its combination of speed, security, and scalability, the Cisco Systems BC-23 is an invaluable asset for modern businesses. It stands out not just as a networking device but as a comprehensive solution that meets the demands of today's fast-paced, technology-driven environment. As companies continue to leverage digital tools for growth and efficiency, the BC-23 will undoubtedly play a significant role in their success.
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