- ACL Support for Filtering IP Options
- ACL Syslog Correlation
- Commented IP Access List Entries
- Configuring an FQDN ACL
- Creating an IP Access List to Filter TCP Flags
- IPv6 ACL Extensions for Hop by Hop Filtering
- IP Access List Entry Sequence Numbering
- IP Named Access Control Lists
- IPv6 PACL Support
- Named ACL Support for Noncontiguous Ports on an Access Control Entry
Contents
- IPv6 ACL Extensions for Hop by Hop Filtering
- Finding Feature Information
- Information About IPv6 ACL Extensions for Hop by Hop Filtering
- ACLs and Traffic Forwarding
- How to Configure IPv6 ACL Extensions for Hop by Hop Filtering
- Configuring IPv6 ACL Extensions for Hop by Hop Filtering
- Configuration Example for IPv6 ACL Extensions for Hop by Hop Filtering
- Example: IPv6 ACL Extensions for Hop by Hop Filtering
- Additional References
- Feature Information for IPv6 ACL Extensions for Hop by Hop Filtering
IPv6 ACL Extensions for Hop by Hop Filtering
The IPv6 ACL Extensions for Hop by Hop Filtering feature allows you to control IPv6 traffic that might contain hop-by-hop extension headers. You can configure an access control list (ACL) to deny all hop-by-hop traffic or to selectively permit traffic based on protocol.
- Finding Feature Information
- Information About IPv6 ACL Extensions for Hop by Hop Filtering
- How to Configure IPv6 ACL Extensions for Hop by Hop Filtering
- Configuration Example for IPv6 ACL Extensions for Hop by Hop Filtering
- Additional References
- Feature Information for IPv6 ACL Extensions for Hop by Hop Filtering
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Information About IPv6 ACL Extensions for Hop by Hop Filtering
ACLs and Traffic Forwarding
IPv6 access control lists (ACLs) determine what traffic is blocked and what traffic is forwarded at device interfaces. ACLs allow filtering based on source and destination addresses, inbound and outbound to a specific interface. Use the ipv6 access-list command to define an IPv6 ACL, and the deny and permit commands to configure its conditions.
The IPv6 ACL Extensions for Hop by Hop Filtering feature implements RFC 2460 to support traffic filtering in any upper-layer protocol type.
How to Configure IPv6 ACL Extensions for Hop by Hop Filtering
Configuring IPv6 ACL Extensions for Hop by Hop Filtering
1.
enable
2.
configure
terminal
3.
ipv6
access-list
access-list-name
4. permit protocol {source-ipv6-prefix/prefix-length | any | host source-ipv6-address | auth} [operator [port-number]] {destination-ipv6-prefix/prefix-length | any | host destination-ipv6-address | auth} [operator [port-number]] [dest-option-type [header-number | header-type]] [dscp value] [flow-label value] [fragments] [hbh] [log] [log-input] [mobility] [mobility-type [mh-number | mh-type]] [reflect name [timeout value]] [routing] [routing-type routing-number] [sequence value] [time-range name]
5.
deny
protocol
{source-ipv6-prefix/prefix-length |
any |
host
source-ipv6-address
|
auth} [operator [port-number]] {destination-ipv6-prefix/prefix-length |
any |
host
destination-ipv6-address |
auth} [operator [port-number]] [dest-option-type [header-number |
header-type]] [dscp
value] [flow-label
value] [fragments] [hbh] [log] [log-input] [mobility] [mobility-type [mh-number |
mh-type]] [routing] [routing-type
routing-number] [sequence
value] [time-range
name] [undetermined-transport]
6.
end
DETAILED STEPS
Configuration Example for IPv6 ACL Extensions for Hop by Hop Filtering
Example: IPv6 ACL Extensions for Hop by Hop Filtering
Device(config)# ipv6 access-list hbh_acl
Device(config-ipv6-acl)# permit tcp any any hbh
Device(config-ipv6-acl)# permit tcp any any
Device(config-ipv6-acl)# permit udp any any
Device(config-ipv6-acl)# permit udp any any hbh
Device(config-ipv6-acl)# permit hbh any any
Device(config-ipv6-acl)# permit any any
Device(config-ipv6-acl)# hardware statistics
Device(config-ipv6-acl)# exit
! Assign an IP address and add the ACL on the interface.
Device(config)# interface FastEthernet3/1
Device(config-if)# ipv6 address 1001::1/64
Device(config-if)# ipv6 traffic-filter hbh_acl in
Device(config-if)# exit
Device(config)# exit
Device# clear counters
Clear "show interface" counters on all interfaces [confirm]
Device#
! Verify the configurations.
Device# show running-config interface FastEthernet3/1
Building configuration...
Current configuration : 114 bytes
!
interface FastEthernet3/1
no switchport
ipv6 address 1001::1/64
ipv6 traffic-filter hbh_acl
end
Additional References
Related Documents
Standards and RFCs
Standard/RFC |
Title |
|---|---|
|
RFC 2460 |
Internet Protocol, Version 6 (IPv6) |
Technical Assistance
Description |
Link |
|---|---|
|
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
Feature Information for IPv6 ACL Extensions for Hop by Hop Filtering
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Feature Name |
Releases |
Feature Information |
|---|---|---|
|
IPv6 ACL Extensions for Hop by Hop Filtering |
15.1(1)SG 15.1(1)SY 15.2(3)T 15.3(1)S |
Allows you to control IPv6 traffic that might contain hop-by-hop extension headers. The following commands were introduced or modified: deny (IPv6), permit (IPv6). |