358 CHAPTER 7: CONFIGURING AUTHENTICATION, AUTHORIZATION, AND ACCOUNTING PARAMETERS
6 Define the IP attributes (source and destination IP addresses, the TOS, and
the precedence). The steps are the same as the steps when configuring
an IP ACE. See step 6 on page 351 through step 9 on page 352.
7 In the Protocol ID box, specify the IP protocol number. Table 24 lists
commonly used IP protocol numbers.
For a complete list of IP protocol numbers, see
www.iana.org/assignments/protocol-numbers.
8 Click Finish.
Adding ACEs to an
ACL
The order in which ACEs are listed in an ACL is critical. An ACE that is
higher in the list is executed prior to ACEs lower in the list. When you
create an ACL, the ACEs are listed in the order in which you created
them. You can change the order of ACEs using the ACL Setup page.
Table 24 Commonly Used IP Protocol Numbers
IP Protocol Number Protocol
1 Internet Control Message Protocol (ICMP)
2 Internet Group Management Protocol (IGMP)
6 Transmission Control Protocol (TCP)
9 Any private interior gateway (used by Cisco for Internet
Gateway Routing Protocol)
17 User Datagram Protocol (UDP)
41 IPv6
46 Reservation Protocol (RSVP)
47 Generic Routing Encapsulation (GRE)
50 Encapsulation Security Payload for IPSec (IPSec-ESP)
51 Authentication Header for IPSec (IPSec-AH)
55 IP Mobility (Mobile IP)
88 Enhanced Interior Gateway Routing Protocol (EIGRP)
89 Open Shortest Path First (OSPF) protocol
103 Protocol Independent Multicast (PIM)
112 Virtual Router Redundancy Protocol (VRRP)
115 Layer Two Tunneling Protocol (L2TP)
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