Allied Telesis X900-12XT/S Creating a class-map, Specifying what the class-map will match on

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Making filters by using QoS class-maps

3.Specify what the class-map will match on (see page 9). This involves: z attaching the ACL to the class-map

z using other match commands to further limit what the traffic will match the class-map (unless the ACL’s settings were enough)

4.Attach the class-maps to a policy-map (see page 12).

5.Attach the policy-map to the ingress port or ports (see page 12).

The following sections describe how to do each of these steps (except creating ACLs—that’s described from page 3).

Creating a class-map

To create a class-map, enter global configuration mode and use the command:

awplus(config)#class-map <name>

This puts you into class-map configuration mode.

Specifying what the class-map will match on

To do this, first attach the ACL to the class-map (unless you don’t need an ACL). In class-map configuration mode, use the command:

awplus(config-cmap)#match access-group <number>

Next, use other match commands to further limit which traffic will match the class-map (unless the ACL’s settings were enough). This means that you select the matching traffic by using a combination of the ACL’s settings and the QoS match commands. The ACL and match commands are ANDed together to make the class-map’s filtering rule. The available match commands are:

match cos match ip-dscp match ip-precedence

match eth-format protocol (or match protocol eth-format) match tpid

match inner-cos match inner-tpid match inner-vlan match mac-type match tcp-flags match vlan

Most of these options are self-evident, but the following sections give more information about the “inner” options, the TCP flags, and the eth-format and protocol options.

Except for TCP flags, each class-map can only match on one instance of each match type. If you enter multiple matches of the same type, the class-map uses the last match you specify.

If you need more than one filtering rule on the port, create class-maps for each other filter.

Page 9 AlliedWare Plus™ OS How To Note

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Contents AlliedWare PlusTM OS Which products and software version does this Note apply to? Creating IP hardware ACLs Creating hardware ACLsDestination-ip-address TCP and UDP You can filter TCP and UDP packets on the basis Creating MAC address hardware ACLs Effects of the action keywords in ACLsACLs Making filters by applying hardware ACLs to portsMaking filters by using QoS class-maps Specifying what the class-map will match on Creating a class-mapMatching on inner keywords for nested VLANs Matching on TCP flag So will the following single match commandApplying the class-maps to a policy-map Applying the policy-map to portsMatching on eth-format and protocol Combining interface ACLs and QoS class-maps Logic of the operation of the hardware filtersBlocking all multicast traffic ExamplesMirroring Http and Smtp traffic Blocking all multicast traffic except one addressMirroring ARP packets This example uses two QoS class-maps Blocking TCP sessions in one directionFilter rules table How many filters can you create?Profile 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

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