Difference and Relationship in BGP

BGP: Overview of the Available Filter Types

Difference and Relationship in BGP

 

KEY WORD IN COMMAND

DEFINABLE FILTER

WAY TO APPLY FILTERING

 

 

 

 

ACL

access-list

Yes

 

 

 

 

 

Distribute list

distribute-list

 

Yes

 

 

 

 

Prefix list

prefix-list

Yes

Yes

 

 

 

 

AS path list

as-path

Yes

 

 

 

 

 

Filter list

filter-list

 

Yes

 

 

 

 

Route map

route-map

Yes

Yes

 

 

 

 

DEFINABLE

 

WAY TO APPLY FILTERING

 

FILTER

 

 

 

 

DISTRIBUTE LIST

PREFIX LIST

FILTER LIST

ROUTE MAP

 

 

 

 

 

 

ACL

YES

 

 

YES

 

 

 

 

 

Prefix list

 

YES

 

YES

 

 

 

 

 

AS path list

 

 

YES

YES

 

 

 

 

 

Route map

 

 

 

YES

 

 

 

 

 

Examples for filtering BGP Update messages

All above filters can be used in incoming or outgoing directions of the update messages. For ACL, distribute list, AS path list, and prefix list, the order of application is not important. If an update is denied by any given filter, it is discarded immediately, and is not run through any of the other filters. If an update is permitted by one filter, it is passed through to the next filter to be considered. At the end, you end up with the set of updates that all the filters agree should not be discarded. However, route maps are applied last, after the other types of filter. This is because route maps can modify updates, not just accept or discard them.

Use Route Maps and Other Filters to Filter and Alter BGP and OSPF Routes Page 7

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Allied Telesis X8100, x908 manual Difference and Relationship in BGP, Examples for filtering BGP Update messages

X8100, x908 specifications

The Allied Telesis x908 and the SwitchBlade x900 series of network switches are cutting-edge solutions designed to address the demands of modern networking environments. These switches are known for their high performance, reliability, and robust feature sets, making them ideal for enterprise and service provider networks.

The Allied Telesis x908 series consists of modular and chassis-based systems that can accommodate a variety of network configurations. One of the main features of the x908 series is its ability to offer high scalability with support for a large number of ports. This makes it suitable for data centers and large enterprise networks where space and bandwidth optimization are critical.

In addition to scalability, the x908 series supports advanced Layer 2 and Layer 3 switching capabilities. This allows for efficient traffic management and routing, ensuring that data is delivered swiftly and reliably. The x908 also incorporates intelligent features such as Quality of Service (QoS), which prioritizes critical network traffic, ensuring that time-sensitive data—like voice and video—maintains its quality during transmission.

The SwitchBlade x900 series takes this functionality further with its innovative modular architecture. This allows organizations to configure their networks to meet specific needs by choosing from a variety of interface cards and service modules. The SwitchBlade x900 also supports advanced security features such as Access Control Lists (ACLs) and VLAN segmentation, which provide enhanced protection against unauthorized access and network threats.

Another hallmark of the x908 and SwitchBlade series is their support for high-speed Ethernet technologies, including 10G and 40G Ethernet. This enables organizations to keep pace with the increasing bandwidth demands of applications and services, particularly in cloud computing and data-intensive workloads.

Both the x908 and the SwitchBlade x900 series are designed with energy efficiency in mind, featuring power-saving technologies that reduce overall operational costs. Coupled with Allied Telesis' management tools, which provide detailed analytics and monitoring, network administrators can optimize performance and energy consumption simultaneously.

In summary, the Allied Telesis x908 and SwitchBlade x900 series offer a comprehensive suite of features, high performance, scalability, and advanced networking technologies. They represent a strategic investment for organizations looking to build resilient, efficient, and future-proof network infrastructures.