Implementing IPv6 for Network Management

Last Updated: December 1, 2011

This document describes the concepts and commands used to manage Cisco applications over IPv6 and to implement IPv6 for network management.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see 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 document.

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 Implementing IPv6 for Network Management

Telnet Access over IPv6

The Telnet client and server in the Cisco IOS software support IPv6 connections. A user can establish a Telnet session directly to the router using an IPv6 Telnet client, or an IPv6 Telnet connection can be initiated from the router. A vty interface and password must be created in order to enable Telnet access to an IPv6 router.

TFTP IPv6 Support

The Trivial File Transfer Protocol (TFTP) is designed to transfer files over the network from one host to another using the most minimal set of functionality possible. TFTP uses a client-server model in which clients can request to copy files to or from a server. TFTP uses UDP over IPv4 or IPv6 as its transport, and can work over IPv4 and IPv6 network layers.

TFTP File Downloading for IPv6

IPv6 supports TFTP file downloading and uploading using the copycommand. The copycommand accepts a destination IPv6 address or IPv6 hostname as an argument and saves the running configuration of the router to an IPv6 TFTP server, as follows: 

Router# copy running-config tftp://[3ffe:xxxx:c18:1:290:27ff:fe3a:9e9a]/running-config

ping and traceroute Commands in IPv6

The ping command accepts a destination IPv6 address or IPv6 hostname as an argument and sends Internet Control Message Protocol version 6 (ICMPv6) echo request messages to the specified destination. The ICMPv6 echo reply messages are reported on the console. Extended ping functionality is also supported in IPv6.

The traceroute command accepts a destination IPv6 address or IPv6 hostname as an argument and will generate IPv6 traffic to report each IPv6 hop used to reach the destination address.

SSH over an IPv6 Transport

SSH in IPv6 functions the same and offers the same benefits as SSH in IPv4. The SSH Server feature enables an SSH client to make a secure, encrypted connection to a Cisco router, and the SSH Client feature enables a Cisco router to make a secure, encrypted connection to another Cisco router or to any other device running an SSH server. IPv6 enhancements to SSH consist of support for IPv6 addresses that enable a Cisco router to accept and establish secure, encrypted connections with remote IPv6 nodes over an IPv6 transport.

SNMP over an IPv6 Transport

Simple Network Management Protocol (SNMP) can be configured over IPv6 transport so that an IPv6 host can perform SNMP queries and receive SNMP notifications from a device running Cisco IOS software for IPv6. The SNMP agent and related MIBs have been enhanced to support IPv6 addressing.

SNMP for IPv6 provides 3DES and AES are provided for message encryption.

Cisco IOS IPv6 MIBs

Cisco has long supported IP-MIB and IP-FORWARD-MIB in IPv4. CISCO-IETF-IP-MIB and CISCO-IETF-IP-FORWARDING-MIB are IPv6 MIBs that are defined as being protocol-independent, but are implemented only for IPv6 objects and tables. In Cisco IOS Release 12.2(33)SRC, IP-MIB and IP-FORWARD-MIB were updated to RFC 4293 and RFC 4292 standards, as follows:

  • The upgrade is backward-compatible; all IP-MIB and IP-FORWARD-MIB objects and tables still appear.
  • IP-MIB and IP-FORWARD-MIB include definitions of new IPv6-only, IPv4-only, and protocol-version independent (PVI) objects and tables. However, support is added only for the new IPv6-only and the new IPv6 part of the PVI objects and tables in these MIBs.

CISCO-IETF-IP-MIB and CISCO-IETF-IP-FORWARDING-MIB have been removed from the Cisco IOS releases in which the new standards have been applied. Information in these MIBs is now included in these new MIBs: IP-MIB and IP-FORWARD-MIB. See the Feature Information for Implementing IPv6 for Network Management for the releases.

MIBs Supported for IPv6

The following MIBs are supported for IPv6:

  • CISCO-CONFIG-COPY-MIB
  • CISCO-CONFIG-MAN-MIB
  • CISCO-DATA-COLLECTION-MIB
  • CISCO-FLASH-MIB
  • IP-FORWARD-MIB
  • IP-MIB
  • ENTITY-MIB
  • NOTIFICATION-LOG-MIB
  • SNMP-TARGET-MIB

CISCO-CONFIG-COPY-MIB and CISCO-FLASH-MIB support IPv6 addressing when TFTP, remote copy protocol (rcp), or FTP is used.

The following MIB was added to support IPv6 over SNMP:

  • CISCO-SNMP-TARGET-EXT-MIB

The following MIBs were modified to support IPv6 over SNMP:

  • CISCO-FLASH-MIB
  • CISCO-CONFIG-MAN-MIB
  • CISCO-CONFIG-COPY-MIB

Cisco IOS IPv6 Embedded Management Components

This section describes Cisco IOS embedded management components that have IPv6-compliant operability in IPv6 and dual-stack IPv6 and IPv4 networks.

Syslog

The Cisco IOS system message logging (syslog) process in IPv6 allows users to log syslog messages to external syslog servers and hosts with IPv6 addresses. This implementation allows user to specify an IPv4-based logging host (syslog server) by providing the host's IP address in IPv4 format (for example, 192.168.0.0) or IPv6 format (for example, 2001:DB8:A00:1::1/64).

CNS Agents

IPv6 addressing is supported in the Cisco Networking Services (CNS) subsystem. CNS is a foundation technology for linking users to networking services and provides the infrastructure for the automated configuration of large numbers of network devices. Many IPv6 networks are complex, with many devices, and each device must be configured individually. When standard configurations do not exist or have been modified, the time involved in initial installation and subsequent upgrading is considerable. Internet service providers (ISPs) need a method for sending out partial configurations to introduce new services.

To address all these issues, CNS was designed to provide "plug-and-play" network services using a central directory service and distributed agents. CNS features include CNS agents and a flow-through provisioning structure. CNS flow-through provisioning uses the CNS configuration and event agents to provide an automated workflow, eliminating the need for an onsite technician.

IPv6 addressing supports the CNS agents described in the following sections:

CNS Configuration Agent

The CNS configuration agent is involved in the initial configuration and subsequent partial configurations on a Cisco IOS device. The configuration agent uses a CNS configuration engine to provide methods for automating initial Cisco IOS device configurations, incremental configurations, and synchronized configuration updates, and the configuration engine reports the status of the configuration load as an event to which a network monitoring or workflow application can subscribe.

CNS Event Agent

The CNS event agent provides a transport connection to the CNS event bus for all other CNS agents. No event can be sent to the router by the configuration engine until the CNS event agent is operational and has successfully built a connection between the configuration engine and the router.

The event agent uses a CNS configuration engine to provide methods for automating initial Cisco IOS device configurations, incremental configurations, and synchronized configuration updates.

CNS EXEC Agent

The CNS EXEC agent allows a remote application to execute a CLI command in EXEC mode on a Cisco IOS device by sending an event message that contains the command.

CNS Image Agent

Administrators maintaining large networks of Cisco IOS devices need an automated mechanism to load image files onto large numbers of remote devices. Network management applications are useful to determine which images to run and how to manage images received from the Cisco online software center. Other image distribution solutions do not scale to cover thousands of devices and cannot distribute images to devices behind a firewall or using Network Address Translation (NAT). The CNS image agent enables the managed device to initiate a network connection and request an image download allowing devices using NAT, or behind firewalls, to access the image server.

The CNS image agent can be configured to use the CNS event bus. To use the CNS event bus, the CNS event agent must be enabled and connected to the CNS event gateway in the CNS Configuration Engine. The CNS image agent can also use an HTTP server that understands the CNS image agent protocol. Deployment of CNS image agent operations can use both the CNS event bus and an HTTP server.

Config Logger

Config logger tracks and reports configuration changes. Config logger supports two content types:

  • Plain text--With plain-text format, the config logger reports configuration changes only.

XML--The config logger uses Extensible Markup Language (XML) to report the configuration change details (for example, what changed, who changed it, when changes were made, parser return code (PRC) values, and incremental NVGEN results).

HTTP(S) IPv6 Support

This feature enhances the HTTP(S) client and server to support IPv6 addresses. The HTTP server in Cisco IOS software can service requests from both IPv6 and IPv4 HTTP clients. The HTTP client in Cisco IOS software supports sending requests to both IPv4 and IPv6 HTTP servers. When you use the HTTP client, URLs with literal IPv6 addresses must be formatted using the rules listed in RFC 2732.

TCL

Tool command language (TCL) is used in Cisco IOS software for IPv6 to support features such as embedded syslog manager (ESM), embedded event manager (EEM), interactive voice response (IVR), and tclsh parser mode. TCL supports both initiating (client) and listening (server) sockets.

NETCONF

The Network Configuration Protocol (NETCONF) defines a mechanism through which a network device can be managed, configuration data information can be retrieved, and new configuration data can be uploaded and manipulated. NETCONF uses XML-based data encoding for the configuration data and protocol messages.

SOAP Message Format

Using the Service-Oriented Access Protocol (SOAP) protocol provides a way to format the layout of CNS messages in a consistent manner. SOAP is a protocol intended for exchanging structured information in a decentralized, distributed environment. SOAP uses XML technologies to define an extensible messaging framework that provides a message format that can be exchanged over a variety of underlying protocols.

Within the SOAP message structure, there is a security header that enables CNS notification messages to authenticate user credentials.

IP SLAs for IPv6

Cisco IOS IP Service Level Agreements (SLAs) are a portfolio of technology embedded in most devices that run Cisco IOS software that allows Cisco customers to analyze IPv6 service levels for IPv6 applications and services, to increase productivity, to lower operational costs, and to reduce the frequency of network outages. IP SLAs uses active traffic monitoring--the generation of traffic in a continuous, reliable, and predictable manner--for measuring network performance.

The following Cisco IOS IP SLAs are supported for IPv6:

  • Internet Control Message Protocol (ICMP) echo operation--Used to monitor end-to-end response time between a Cisco router and devices using IPv4 or IPv6. ICMP Echo is useful for troubleshooting network connectivity issues.
  • TCP connect operation--Used to measure the response time taken to perform a TCP Connect operation between a Cisco router and devices using IPv4 or IPv6.
  • User Datagram Protocol (UDP) echo operation--Used to monitor end-to-end response time between a Cisco router and devices using IPv4 or IPv6.
  • UDP jitter operation--Used to analyze round-trip delay, one-way delay, one-way jitter, one-way packet loss, and connectivity in networks that carry UDP traffic in IPv4 or IPv6 networks.
  • UDP jitter operation--Used to proactively monitor VoIP quality levels in your network, allowing you to guarantee VoIP quality levels to your users in IPv4 or IPv6 networks.

How to Implement IPv6 for Network Management

Enabling Telnet Access to an IPv6 Router and Establishing a Telnet Session

Using either IPv4 or IPv6 transport, you can use Telnet to connect from a host to a router, from a router to a router, and from a router to a host.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    ipv6 host name [port] ipv6-address1 ipv6-address2...ipv6-address4

4.    line [aux | console | tty | vty] line-number [ending-line-number]

5.    password password

6.    login [local | tacacs]

7.    ipv6 access-class ipv6-access-list-name {in | out

8.    telnet host port ] [keyword


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Router> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters global configuration mode.

 
Step 3
ipv6 host name [port] ipv6-address1 ipv6-address2...ipv6-address4


Example:

Router(config)# ipv6 host cisco-sj 2001:DB8:20:1::12

 

Defines a static hostname-to-address mapping in the hostname cache.

 
Step 4
line [aux | console | tty | vty] line-number [ending-line-number]


Example:

Router(config)# line vty 0 4

 

Works with the vty keyword to create a vty interface.

 
Step 5
password password


Example:

Router(config)# password hostword

 

Creates a password that enables Telnet.

 
Step 6
login [local | tacacs]


Example:

Router(config)# login tacacs

 

(Optional) Enables password checking at login.

 
Step 7
ipv6 access-class ipv6-access-list-name {in | out


Example:

Router(config)# ipv6 access-list hostlist

 

(Optional) Adds an IPv6 access list to the line interface.

  • Using this command restricts remote access to sessions that match the access list.
 
Step 8
telnet host port ] [keyword


Example:

Router(config)# telnet cisco-sj

 

Establishes a Telnet session from a router to a remote host using either the hostname or the IPv6 address.

The Telnet session can be established to a router name or to an IPv6 address.

 

Enabling SSH on an IPv6 Router

If you do not configure SSH parameters, then the default values will be used.

Before You Begin

Before configuring SSH over an IPv6 transport, ensure that the following conditions exist:

  • An IPsec (Data Encryption Standard (DES) or 3DES) encryption software image from Cisco IOS Release 12.2(8)T or later releases or Cisco IOS Release 12.0(22)S or later releases is loaded on your router. IPv6 transport for the SSH server and SSH client requires an IPsec encryption software image.
  • A hostname and host domain are configured for your router. Refer to the "Mapping Host Names to IPv6 Addresses" section of the Implementing IPv6 Addressing and Basic Connectivity module for information on assigning hostnames to IPv6 addresses and specifying default domain names that can be used by both IPv4 and IPv6.
  • A Rivest, Shamir, and Adelman (RSA) key pair, which automatically enables SSH, is generated for your router.

Note
RSA is the public key cryptographic system developed by Ron Rivest, Adi Shamir, and Leonard Adelman. RSA keys come in pairs: one public key and one private key.
  • A user authentication mechanism for local or remote access is configured on your router.

Note

The basic restrictions for SSH over an IPv4 transport listed in " Configuring Secure Shell " in the Cisco IOS Security Configuration Guide apply to SSH over an IPv6 transport. In addition to the restrictions listed in that chapter, the use of locally stored usernames and passwords is the only user authentication mechanism supported by SSH over an IPv6 transport; the TACACS+ and RADIUS user authentication mechanisms are not supported over an IPv6 transport.


Note
To authenticate SSH clients, configure TACACS+ or RADIUS over an IPv4 transport and then connect to an SSH server over an IPv6 transport.
>

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    ip ssh [timeout seconds | authentication-retries integer]

4.    exit

5.    ssh [-v {1| 2}] [-c {3des | aes128-cbc | aes192-cbc | aes256-cbc}] [-l userid | -l userid : number ip-address | -l userid :rotary number ip-address] [-m {hmac-md5| hmac-md5-96 | hmac-sha1 | hmac-sha1-96}] [-o numberofpasswordprompts n] [-p port-num] {ip-addr | hostname} [command


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Router> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters global configuration mode.

 
Step 3
ip ssh [timeout seconds | authentication-retries integer]


Example:

Router(config)# ip ssh timeout 100 authentication-retries 2

 

Configures SSH control variables on your router.

  • You can specify the timeout in seconds, not to exceed 120 seconds. The default is 120. This setting applies to the SSH negotiation phase. Once the EXEC session starts, the standard timeouts configured for the vty apply.

By default, five vty lines are defined (0-4); therefore, five terminal sessions are possible. After the SSH executes a shell, the vty timeout starts. The vty timeout defaults to 10 minutes.

  • You can also specify the number of authentication retries, not to exceed five authentication retries. The default is three.
 
Step 4
exit


Example:

Router(config)# exit

 

Exits configuration mode, and returns the router to privileged EXEC mode.

 
Step 5
ssh [-v {1| 2}] [-c {3des | aes128-cbc | aes192-cbc | aes256-cbc}] [-l userid | -l userid : number ip-address | -l userid :rotary number ip-address] [-m {hmac-md5| hmac-md5-96 | hmac-sha1 | hmac-sha1-96}] [-o numberofpasswordprompts n] [-p port-num] {ip-addr | hostname} [command


Example:

Router# ssh

 

Starts an encrypted session with a remote networking device.

 

Configuring an SNMP Notification Server over IPv6

Use an SNMP community string to define the relationship between the SNMP manager and the agent. The community string acts like a password to regulate access to the agent on the router. Optionally, you can specify one or more of the following characteristics associated with the string:

  • An access list of IP addresses of the SNMP managers that are permitted to use the community string to gain access to the agent.
  • A MIB view, which defines the subset of all MIB objects accessible to the given community.
  • Read and write or read-only permission for the MIB objects accessible to the community.

You can configure one or more community strings. To remove a specific community string, use the no snmp-server community command.

The snmp-server host command specifies which hosts will receive SNMP notifications, and whether you want the notifications sent as traps or inform requests. The snmp-server enable traps command globally enables the production mechanism for the specified notification types (such as Border Gateway Protocol [BGP] traps, config traps, entity traps, and Hot Standby Router Protocol [HSRP] traps).

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    snmp-server community string [view view-name] [ro | rw] [ipv6 nacl] [access-list-number]

4.    snmp-server engineID remote {ipv4-ip-address| ipv6-address} [udp-port udp-port-number] [vrf vrf-name] engineid-string

5.    snmp-server group group-name {v1 | v2c | v3 {auth | noauth | priv}} [context context-name] [read read-view] [write write-view] [notify notify-view] [access [ipv6 named-access-list]{acl-number | acl-name}]

6.    snmp-server host {hostname | ip-address} [vrf vrf-name] [traps | informs] [version {1 | 2c | 3 [auth | noauth | priv]}] community-string [udp-port port] [notification-type]

7.    snmp-server user username group-name [remote host [udp-port port]] {v1 | v2c | v3 [encrypted] [auth {md5 | sha} auth-password]} [access [ipv6 nacl] [priv {des | 3des | aes{128 192| 256}} privpassword] {acl-number | acl-name} ]

8.    snmp-server enable traps [notification-type] [vrrp


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Router> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters global configuration mode.

 
Step 3
snmp-server community string [view view-name] [ro | rw] [ipv6 nacl] [access-list-number]


Example:

Router(config)# snmp-server community mgr view restricted rw ipv6 mgr2

 

Defines the community access string.

 
Step 4
snmp-server engineID remote {ipv4-ip-address| ipv6-address} [udp-port udp-port-number] [vrf vrf-name] engineid-string


Example:

Router(config)# snmp-server engineID remote 3ffe:b00:c18:1::3/127 remotev6

 

(Optional) Specifies the name of the remote SNMP engine (or copy of SNMP).

 
Step 5
snmp-server group group-name {v1 | v2c | v3 {auth | noauth | priv}} [context context-name] [read read-view] [write write-view] [notify notify-view] [access [ipv6 named-access-list]{acl-number | acl-name}]


Example:

Router(config)# snmp-server group public v2c access ipv6 public2

 

(Optional) Configures a new SNMP group, or a table that maps SNMP users to SNMP views.

 
Step 6
snmp-server host {hostname | ip-address} [vrf vrf-name] [traps | informs] [version {1 | 2c | 3 [auth | noauth | priv]}] community-string [udp-port port] [notification-type]


Example:

Router(config)# snmp-server host host1.com 2c vrf trap-vrf

 

Specifies the recipient of an SNMP notification operation.

  • Specifies whether you want the SNMP notifications sent as traps or informs, the version of SNMP to use, the security level of the notifications (for SNMPv3), and the recipient (host) of the notifications.
 
Step 7
snmp-server user username group-name [remote host [udp-port port]] {v1 | v2c | v3 [encrypted] [auth {md5 | sha} auth-password]} [access [ipv6 nacl] [priv {des | 3des | aes{128 192| 256}} privpassword] {acl-number | acl-name} ]


Example:

Router(config)# snmp-server user user1 bldg1 remote 3ffe:b00:c18:1::3/127 v2c access ipv6 public2

 

(Optional) Configures a new user to an existing SNMP group.

Note    You cannot configure a remote user for an address without first configuring the engine ID for that remote host. This is a restriction imposed in the design of these commands; if you try to configure the user before the host, you will receive a warning message and the command will not be executed
 
Step 8
snmp-server enable traps [notification-type] [vrrp


Example:

Router(config)# snmp-server enable traps bgp

 

Enables sending of traps or informs, and specifies the type of notifications to be sent.

  • If a notification-type is not specified, all supported notification will be enabled on the router.
  • To discover which notifications are available on your router, enter the snmp-server enable traps ? command.
 

Configuring Cisco IOS IPv6 Embedded Management Components

Most IPv6 embedded management components are enabled automatically when IPv6 is enabled and do not need further configuration. To configure syslog over IPv6 or disable HTTP access to a router, refer to the tasks in the following sections:

Configuring Syslog over IPv6

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    logging host {{ip-address | hostname} | {ipv6 ipv6-address | hostname}} [transport {udp [port port-number] | tcp [port port-number] [audit]}] [xml | filtered [stream stream-id]] [alarm [severity]]


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Router> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters global configuration mode.

 
Step 3
logging host {{ip-address | hostname} | {ipv6 ipv6-address | hostname}} [transport {udp [port port-number] | tcp [port port-number] [audit]}] [xml | filtered [stream stream-id]] [alarm [severity]]


Example:

Router(config)# logging host ipv6 AAAA:BBBB:CCCC:DDDD::FFFF

 

Logs system messages and debug output to a remote host.

 

Disabling HTTP Access to an IPv6 Router

HTTP access over IPv6 is automatically enabled if an HTTP server is enabled and the router has an IPv6 address. If the HTTP server is not required, it should be disabled.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    no ip http server


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Router> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters global configuration mode.

 
Step 3
no ip http server


Example:

Router(config)# no ip http server

 

Disables HTTP access.

 

Configuration Examples for Implementing IPv6 for Network Management

Examples Enabling Telnet Access to an IPv6 Router Configuration

The following examples provide information on how to enable Telnet and start a session to or from an IPv6 router. In the following example, the IPv6 address is specified as 2001:DB8:20:1::12, and the hostname is specified as cisco-sj. The show host command is used to verify this information.

Router# configure terminal
Router(config)# ipv6 host cisco-sj 2001:DB8:20:1::12
Router(config)# end
Router# show host
Default domain is not set
Name/address lookup uses static mappings
Codes:UN - unknown, EX - expired, OK - OK, ?? - revalidate
       temp - temporary, perm - permanent
       NA - Not Applicable None - Not defined
Host                 Port  Flags      Age Type   Address(es)
cisco-sj             None  (perm, OK)  0  IPv6 2001:DB8:20:1::12

To enable Telnet access to a router, create a vty interface and password:

Router(config)# line vty 0 4
password lab
login

To use Telnet to access the router, you must enter the password:

Router# telnet cisco-sj
Trying cisco-sj (2001:DB8:20:1::12)... Open
User Access Verification
Password:
cisco-sj
.
.
.
verification

It is not necessary to use the telnet command. Specifying either the hostname or the address is sufficient, as shown in the following examples:

Router# cisco-sj

or

Router# 2001:DB8:20:1::12

To display the IPv6 connected user (line 130) on the router to which you are connected, use the show users command:

Router# show users
    Line       User       Host(s)              Idle       Location
*  0 con 0                idle                 00:00:00
 130 vty 0                idle                 00:00:22   8800::3

Note that the address displayed is the IPv6 address of the source of the connection. If the hostname of the source is known (either through a domain name server [DNS] or locally in the host cache), then it is displayed instead:

Router# show users
    Line       User       Host(s)              Idle       Location
*  0 con 0                idle                 00:00:00
 130 vty 0                idle                 00:02:47   cisco-sj

If the user at the connecting router suspends the session with ^6x and then enters the show sessions command, the IPv6 connection is displayed:

Router# show sessions
Conn Host                Address              Byte  Idle Conn Name
*  1 cisco-sj 2001:DB8:20:1::12      0     0 cisco-sj

The Conn Name field shows the hostname of the destination only if it is known. If it is not known, the output might look similar to the following:

Router# show sessions
Conn Host                Address              Byte  Idle Conn Name
*  1 2001:DB8:20:1::12 2001:DB8:20:1::12      0     0 2001:DB8:20:1::12

Example Disabling HTTP Access to the Router

In the following example, the show running-config command is used to show that HTTP access is disabled on the router:

Router# show running-config
Building configuration...
!
Current configuration : 1490 bytes
!
version 12.2
!
hostname Router
!
no ip http server
!
line con 0
line aux 0
line vty 0 4

Examples Configuring an SNMP Notification Server over IPv6

The following example permits any SNMP to access all objects with read-only permission using the community string named public. The router also will send BGP traps to the IPv4 host 172.16.1.111 and IPv6 host 3ffe:b00:c18:1::3/127 using SNMPv1 and to the host 172.16.1.27 using SNMPv2c. The community string named public is sent with the traps.

Router(config)# snmp-server
 
community public
Router(config)# snmp-server enable traps bgp
Router(config)# snmp-server host
 
172.16.1.27 version 2c public
Router(config)# snmp-server host
 
172.16.1.111 version 1 public
Router(config)# snmp-server host
 
3ffe:b00:c18:1::3/127 public

Associate an SNMP Server Group with Specified Views Example

In the following example, the SNMP context A is associated with the views in SNMPv2c group GROUP1 and the IPv6 named access list public2:

Router(config)# snmp-server context A 
Router(config)# snmp mib community-map commA context A target-list commAVpn
 
Router(config)# snmp mib target list commAVpn vrf CustomerA 
Router(config)# snmp-server view viewA ciscoPingMIB included
Router(config)# snmp-server view viewA ipForward included 
Router(config)# snmp-server group GROUP1 v2c context A read viewA write viewA notify   access ipv6 public2

Create an SNMP Notification Server Example

The following example configures the IPv6 host as the notification server:

Router> enable
Router# configure terminal
Router(config)# snmp-server community mgr view restricted rw ipv6 mgr2
Router(config)# snmp-server engineID remote 3ffe:b00:c18:1::3/127 remotev6
Router(config)# snmp-server group public v2c access ipv6 public2
Router(cofig)# snmp-server host host1.com 2c vrf trap-vrf 
Router(cofig)# snmp-server user user1 bldg1 remote 3ffe:b00:c18:1::3/127 v2c access ipv6 public2
Router(config)# snmp-server enable traps bgp
Router(config)# exit

Additional References

Related Documents

Related Topic

Document Title

IPv6 supported features

"Start Here: Cisco IOS Software Release Specifics for IPv6 Features ," Cisco IOS IPv6 Configuration Guide

Basic IPv6 configuration tasks

"Implementing IPv6 Addressing and Basic Connectivity ," Cisco IOS IPv6 Configuration Guide

IPv6 commands: complete command syntax, command mode, defaults, usage guidelines, and examples

Cisco IOS IPv6 Command Reference

SSH configuration information

Cisco IOS Security Command Reference

IPv4 CNS, SOAP

"Cisco Networking Services," Cisco IOS Network Management Configuration Guide

NETCONF

"Network Configuration Protocol," Cisco IOS Network Management Configuration Guide

IP SLAs for IPv6

  • IP SLAs--Analyzing IP Service Levels Using the ICMP Echo Operation
  • IP SLAs--Analyzing IP Service Levels Using the TCP Connect Operation
  • IP SLAs--Analyzing IP Service Levels Using the UDP Echo Operation
  • IP SLAs--Analyzing IP Service Levels Using the UDP Jitter Operation
  • IP SLAs--Analyzing VoIP Service Levels Using the UDP Jitter Operation

Standards

Standard

Title

No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.

--

MIBs

MIB

MIBs Link

  • CISCO-CONFIG-COPY-MIB
  • CISCO-CONFIG-MAN-MIB
  • CISCO-DATA-COLLECTION-MIB
  • CISCO-FLASH-MIB
  • CISCO-RTTMON-IPv6-MIB
  • CISCO-SNMP-TARGET-EXT-MIB
  • ENTITY-MIB
  • IP-FORWARD-MIB
  • IP-MIB
  • NOTIFICATION-LOG-MIB
  • SNMP-TARGET-MIB

To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs

RFCs

RFC

Title

RFC 2732

Format for Literal IPv6 Addresses in URLs

RFC 3414

User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)

RFC 3484

Default Address Selection for Internet Protocol version 6 (IPv6)

RFC 4292

IP Forwarding Table MIB

RFC 4293

Management Information Base for the Internet Protocol (IP)

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.

http://www.cisco.com/cisco/web/support/index.html

Feature Information for Implementing IPv6 for Network Management

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.

Table 1 Feature Information for Managing Cisco IOS Applications over IPv6

Feature Name

Releases

Feature Information

CNS Agents for IPv6

12.2(33)SB 12.2(33)SRC 12.2(50)SY 12.4(20)T

CNS configuration and event agents use a CNS configuration engine to provide methods for automating initial Cisco IOS device configurations, incremental configurations, and synchronized configuration updates, and the configuration engine reports the status of the configuration load as an event to which a network monitoring or workflow application can subscribe.

HTTP(S) IPv6 Support

12.2(33)SB 12.2(33)SRC 12.2(50)SY 12.4(20)T

This feature enhances the HTTP(S) client and server to support IPv6 addresses.

IP SLAs for IPv6

12.2(33)SB 12.2(33)SRC 12.2(50)SY 12.4(20)T 15.0(1)S

IP SLAs are supported for IPv6.

IPv6 for Config Logger

12.2(33)SB 12.2(33)SRC 12.2(50)SY 12.4(20)T

Config logger tracks and reports configuration changes.

IPv6 NETCONF Support

12.2(33)SB 12.2(33)SRC 12.2(50)SY 12.4(20)T

The Network Configuration Protocol (NETCONF) defines a simple mechanism through which a network device can be managed, configuration data information can be retrieved, and new configuration data can be uploaded and manipulated.

IPv6--syslog over IPv6

12.2(33)SB 12.2(33)SRC 12.2(33)SXI 12.4(4)T

The Cisco IOS syslog process in IPv6 allows users to log syslog messages to external syslog servers and hosts with IPv6 addresses.

IPv6 Services--IP-FORWARD-MIB Support

12.0(22)S 12.2(14)S 12.2(28)SB 12.2(33)SRA 12.2(15)T 12.3 12.3(2)T 12.4 12.4(2)T

A MIB is a database of objects that can be managed on a device. The managed objects, or variables, can be set or read to provide information on the network devices and interfaces.

IPv6 Services--IP-MIB Support

12.0(22)S 12.2(14)S 12.2(28)SB 12.2(33)SRA 12.2(15)T 12.3 12.3(2)T 12.4 12.4(2)T

A MIB is a database of objects that can be managed on a device. The managed objects, or variables, can be set or read to provide information on the network devices and interfaces.

IPv6 Services--RFC 4293 IP-MIB (IPv6 only) and RFC 4292 IP-FORWARD-MIB (IPv6 only)

12.2(33)SB 12.2(58)SE 12.2(54)SG 12.2(33)SRC 12.2(50)SY 15.1(3)T

IP-FORWARD-MIB and IP-MIB were updated to RFC 4292 and RFC 4293 standards, respectively.

IPv6 Support for TCL

12.2(33)SRC 12.2(50)SY 12.4(20)T

IPv6 supports TCL.

IPv6 Support in SOAP

12.2(33)SB 12.2(33)SRC 12.2(50)SY 12.4(20)T

SOAP is a protocol intended for exchanging structured information in a decentralized, distributed environment.

SNMP over IPv6

12.0(27)S 12.2(33)SRB 12.2(33)SXI 12.3(14)T 12.4 12.4(2)T

SNMP can be configured over IPv6 transport so that an IPv6 host can perform SNMP queries and receive SNMP notifications from a device running Cisco IOS IPv6.

SNMPv3 - 3DES and AES Encryption Support

12.2(33)SB 12.2(33)SRB 12.2(33)SXI 12.4(2)T

SNMP for IPv6 supports 3DES and AES encryption.

SSH over an IPv6 Transport

12.0(22)S 12.2(8)T 12.2(14)S 12.2(28)SB 12.2(33)SRA 12.3 12.3(2)T 12.4 12.4(2)T 15.0(1)S

SSH in IPv6 functions the same and offers the same benefits as SSH in IPv4--the SSH Server feature enables an SSH client to make a secure, encrypted connection to a Cisco router and the SSH Client feature enables a Cisco router to make a secure, encrypted connection to another Cisco router or to any other device running an SSH server.

Telnet Access over IPv6

12.0(22)S 12.2(2)T 12.2(14)S 12.2(28)SB 12.3 12.3(2)T 12.4 12.4(2)T

The Telnet client and server in the Cisco IOS software support IPv6 connections. A user can establish a Telnet session directly to the router using an IPv6 Telnet client, or an IPv6 Telnet connection can be initiated from the router.

TFTP File Downloading for IPv6

12.0(22)S 12.2(2)T 12.2(14)S 12.2(28)SB 12.3 12.3(2)T 12.4 12.4(2)T

IPv6 supports TFTP file downloading and uploading.

Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

© 2011 Cisco Systems, Inc. All rights reserved.