Connectivity Guide

Usage Information If you do not enter an access-list name, all MAC access-list counters clear. The counter counts the number of
packets that match each permit or deny statement in an access list. To get a more recent count of packets
matching an access list, clear the counters to start at zero. To view access-list information, use the show
access-lists command.
Example
OS10# clear mac access-list counters
Supported Releases 10.2.0E or later
deny
Congures a lter to drop packets with a specic IP address.
Syntax
deny [protocol-number | icmp | ip | tcp | udp] [A.B.C.D | A.B.C.D/x | any |
host ip-address] [A.B.C.D | A.B.C.D/x | any | host ip-address] [capture | dscp
value | fragment]
Parameters
• protocol-number — (Optional) Enter the protocol number identied in the IP header, from 0 to 255.
• icmp — (Optional) Enter the ICMP address to deny.
• ip — (Optional) Enter the IP address to deny.
• tcp — (Optional) Enter the TCP address to deny.
• udp — (Optional) Enter the UDP address to deny.
• A.B.C.D — Enter the IP address in dotted decimal format.
• A.B.C.D/x — Enter the number of bits to match to the dotted decimal address.
• any — (Optional) Enter the lter type to subject routes to.
– capture — (Optional) Capture packets the lter processes.
– dscp value — (Optional) Deny a packet based on the DSCP values, from 0 to 63.
– fragment — (Optional) Use ACLs to control packet fragments.
• host ip-address — (Optional) Enter the keyword and the IP address to use a host address only.
Default Not congured
Command Mode IPV4-ACL
Usage Information The no version of this command removes the lter.
Example
OS10(config)# ip access-list testflow
OS10(conf-ipv4-acl)# deny udp any any
Supported Releases 10.2.0E or later
deny (IPv6)
Congures a lter to drop packets with a specic IPv6 address.
Syntax
deny [protocol-number | icmp | ipv6 | tcp | udp] [A::B | A::B/x | any | host
ipv6-address] [A::B | A::B/x | any | host ipv6-address] [capture | dscp value |
fragment]
Parameters
• protocol-number — (Optional) Enter the protocol number identied in the IP header, from 0 to 255.
Access Control Lists 711