Dell Networking S6000 Uživatelský manuál stáhnout pdf (Strana 93)

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closer to 0) before rules with higher-order numbers so that packets are matched as you intended. By

default, all ACL rules have an order of 255.

Example of the order Keyword to Determine ACL Sequence

Dell(conf)#ip access-list standard acl1

Dell(config-std-nacl)#permit 20.0.0.0/8

Dell(config-std-nacl)#exit

Dell(conf)#ip access-list standard acl2

Dell(config-std-nacl)#permit 20.1.1.0/24 order 0

Dell(config-std-nacl)#exit

Dell(conf)#class-map match-all cmap1

Dell(conf-class-map)#match ip access-group acl1

Dell(conf-class-map)#exit

Dell(conf)#class-map match-all cmap2

Dell(conf-class-map)#match ip access-group acl2

Dell(conf-class-map)#exit

Dell(conf)#policy-map-input pmap

Dell(conf-policy-map-in)#service-queue 7 class-map cmap1

Dell(conf-policy-map-in)#service-queue 4 class-map cmap2

Dell(conf-policy-map-in)#exit

Dell(conf)#interface te 10/0

Dell(conf-if-te-10/0)#service-policy input pmap

Important Points to Remember

• For route-maps with more than one match clause:

– Two or more match clauses within the same route-map sequence have the same match

commands (though the values are different), matching a packet against these clauses is a logical

OR operation.

– Two or more match clauses within the same route-map sequence have different match

commands, matching a packet against these clauses is a logical AND operation.

• If no match is found in a route-map sequence, the process moves to the next route-map sequence

until a match is found, or there are no more sequences.

• When a match is found, the packet is forwarded and no more route-map sequences are processed.

– If a continue clause is included in the route-map sequence, the next or a specified route-map

sequence is processed after a match is found.

Configuration Task List for Route Maps

Configure route maps in ROUTE-MAP mode and apply the maps in various commands in ROUTER RIP

and ROUTER OSPF modes.

The following list includes the configuration tasks for route maps, as described in the following sections.

• Create a route map (mandatory)

• Configure route map filters (optional)

• Configure a route map for route redistribution (optional)

• Configure a route map for route tagging (optional)

Creating a Route Map

Route maps, ACLs, and prefix lists are similar in composition because all three contain filters, but route

map filters do not contain the permit and deny actions found in ACLs and prefix lists.

Route map filters match certain routes and set or specify values.

Access Control Lists (ACLs)

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