Route Maps; Implementation Information; Important Points To Remember - Dell Z9500 Configuration Manual

remark 4 this remark corresponds to permit any host 1.1.1.1
seq 4 permit ip any host 1.1.1.1
remark 6 this remark has no corresponding rule
remark 8 this remark corresponds to permit ip any host 1.1.1.2
seq 8 permit ip any host 1.1.1.2
seq 10 permit ip any host 1.1.1.3
seq 12 permit ip any host 1.1.1.4
Remarks that do not have a corresponding rule are incremented as a rule. These two mechanisms allow remarks to retain their
original position in the list. The following example shows remark 10 corresponding to rule 10 and as such, they have the same
number before and after the command is entered. Remark 4 is incremented as a rule, and all rules have retained their original
positions.
Dell(config-ext-nacl)# show config
!
ip access-list extended test
remark 4 XYZ
remark 5 this remark corresponds to permit any host 1.1.1.1
seq 5 permit ip any host 1.1.1.1
remark 9 ABC
remark 10 this remark corresponds to permit ip any host 1.1.1.2
seq 10 permit ip any host 1.1.1.2
seq 15 permit ip any host 1.1.1.3
seq 20 permit ip any host 1.1.1.4
Dell# end
Dell# resequence access-list ipv4 test 2 2
Dell# show running-config acl
!
ip access-list extended test
remark 2 XYZ
remark 4 this remark corresponds to permit any host 1.1.1.1
seq 4 permit ip any host 1.1.1.1
remark 6 this remark has no corresponding rule
remark 8 this remark corresponds to permit ip any host 1.1.1.2
seq 8 permit ip any host 1.1.1.2
seq 10 permit ip any host 1.1.1.3
seq 12 permit ip any host 1.1.1.4

Route Maps

Although route maps are similar to ACLs and prefix lists in that they consist of a series of commands that contain a matching
criterion and an action, route maps can modify parameters in matching packets.

Implementation Information

ACLs and prefix lists can only drop or forward the packet or traffic. Route maps process routes for route redistribution. For
example, a route map can be called to filter only specific routes and to add a metric.
Route maps also have an "implicit deny." Unlike ACLs and prefix lists; however, where the packet or traffic is dropped, in route
maps, if a route does not match any of the route map conditions, the route is not redistributed.
The implementation of route maps allows route maps with the no match or no set commands. When there is no match
command, all traffic matches the route map and the set command applies.

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.
Access Control Lists (ACLs) 114