Allied Telesis x908, X900-12XT/S manual Are there enough bytes for your set of filters?

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How many filters can you create?

Are there enough bytes for your set of filters?

Of course, the mask cannot increase without limit—it has a maximum size of 16 bytes.

When it reaches the 16-byte limit, no more ACLs or QoS match commands can be created which would cause the mask to increase in size. The switch can still accept ACLs or QoS match commands that use fields that have already been included in the mask.

There is no particular number of ACLs or QoS match commands that will cause the mask to reach its 16-byte limit—it could happen after a few ACLs, or you might be able to create hundreds of ACLs and QoS match commands without the mask reaching its limit.

So to determine whether you will have enough filter length, look at the fields you want to filter, determine the number of bytes for each field, and sum up the total number of bytes. If that number is less than 16, there is enough filter length. Don’t forget to count TCP and UDP source port as a single field, and likewise to count TCP and UDP destination port as a single field.

Okay length For example, this set of ACLs would work:

source MAC address source UDP port

destination IP address + destination TCP port

The total number of bytes for the switch to check in a packet would be:

source MAC address + IP protocol type + source TCP/UDP port + destination IP address + destination TCP/UDP port =

6 + 1 + 2 + 4 + 2 = 15 bytes

Too long But this set of ACLs would not work:

source MAC address destination MAC address

destination IP address + destination TCP port

The total number of bytes for the switch to check in a packet would be:

source MAC address + destination MAC address + IP protocol type + destination IP address + destination TCP/UDP port =

6 + 6 + 1 + 4 + 2 = 19 bytes

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Contents AlliedWare PlusTM OS Which products and software version does this Note apply to? Creating hardware ACLs Creating IP hardware ACLsDestination-ip-address TCP and UDP You can filter TCP and UDP packets on the basis Effects of the action keywords in ACLs Creating MAC address hardware ACLsMaking filters by applying hardware ACLs to ports ACLsMaking filters by using QoS class-maps Creating a class-map Specifying what the class-map will match onMatching on inner keywords for nested VLANs So will the following single match command Matching on TCP flagMatching on eth-format and protocol Applying the class-maps to a policy-mapApplying the policy-map to ports Logic of the operation of the hardware filters Combining interface ACLs and QoS class-mapsExamples Blocking all multicast trafficBlocking all multicast traffic except one address Mirroring Http and Smtp trafficMirroring ARP packets Blocking TCP sessions in one direction This example uses two QoS class-mapsHow many filters can you create? Filter rules tableProfile mask Are there enough bytes for your set of filters? Some protocols also use filters, so use some of the length
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X900-12XT/S, 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.
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