Tos Information; Configuring Ipv4-Acls Or Ipv6-Acls; Creating Ipv4-Acls Or Ipv6-Acls - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual
Cisco mds 9000 family cli configuration guide - release 4.x (ol-18084-01, february 2009)
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Chapter 35
Configuring IPv4 and IPv6 Access Control Lists
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
1. ICMP redirect packets are always rejected.
ToS Information
IP packets can be filtered based on the following optional ToS conditions:
•
•
Configuring IPv4-ACLs or IPv6-ACLs
Traffic coming into the switch is compared to IPv4-ACL or IPv6-ACL filters based on the order that the
filters occur in the switch. New filters are added to the end of the IPv4-ACL or the IPv6-ACL. The switch
keeps looking until it has a match. If no matches are found when the switch reaches the end of the filter,
the traffic is denied. For this reason, you should have the frequently hit filters at the top of the filter.
There is an implied deny for traffic that is not permitted. A single-entry IPv4-ACL or IPv6-ACL with
only one deny entry has the effect of denying all traffic.
To configure an IPv4-ACL or an IPv6-ACL, follow these steps:
Create an IPv4-ACL or an IPv6-ACL by specifying a filter name and one or more access condition(s).
Step 1
Filters require the source and destination address to match a condition. Use optional keywords to
configure finer granularity.
Note
Step 2
Apply the access filter to specified interfaces.
Creating IPv4-ACLs or IPv6-ACLs
To create an IPv4-ACL, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# ip access-list List1 permit ip any any
switch(config)# no ip access-list List1 permit ip any any
Step 3
switch(config)# ip access-list List1 deny tcp any any
OL-18084-01, Cisco MDS NX-OS Release 4.x
ToS level—The level is specified by a number from 0 to 15.
ToS name—The name can be max-reliability, max-throughput, min-delay, min-monetary-cost, and
normal.
The filter entries are executed in sequential order. You can only add the entries to the end of the
list. Take care to add the entries in the correct order.
Configuring IPv4-ACLs or IPv6-ACLs
Purpose
Enters configuration mode.
Configures an IPv4-ACL called
List1 and permits IP traffic from
any source address to any
destination address.
Removes the IPv4-ACL called
List1.
Updates List1 to deny TCP traffic
from any source address to any
destination address.
Cisco MDS 9000 Family CLI Configuration Guide
35-5
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Troubleshooting
