ESR series service routers.ESR-Series. User manual
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13.5  Access list (ACL) configuration
Access Control List or ACL is a list that contains rules defining traffic transmission through the interface.
13.5.1  Configuration algorithm
Step Description Command Keys
1 Create access control list and 
switch to its configuration mode.
esr(config)# ip access-list 
extended <NAME>
<NAME> – access control list name, 
set by the string of up to 31 
characters.
2 Specify the description of a 
configurable access control list 
(optional).
esr(config-acl)# description 
<DESCRIPTION>
<DESCRIPTION> – access control 
list description, set by the string of 
up to 255 characters.
3 Create a rule and switch to its 
configuration mode.
The rules are proceeded by the 
router in number ascending order.
esr(config-acl)# rule <ORDER> <ORDER> – rule number, takes 
values of [1..4094].
4 Specify the action that should be 
applied for the traffic meeting the 
given requirements.
esr(config-acl-rule)# action 
<ACT>
<ACT> – allocated action:
permit – traffic transfer is 
permitted;
deny – traffic transfer is 
denied.
5 Set name of protocol for which 
the rule should work (optional).
esr(config-acl-rule)# match 
protocol <TYPE>
<TYPE> – protocol type, takes the 
following values: esp, icmp, ah, eigrp, 
ospf, igmp, ipip, tcp, pim, udp, vrrp, 
rdp, l2tp, gre. When specifying the 
'any' value, the rule will work for any 
protocols.
esr(config-acl-rule)# match 
protocol-id <ID>
<ID> – IP identification number, 
takes values of [0x00-0xFF].