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Contents
- Telnet Access over IPv6
- Finding Feature Information
- Prerequisites for Telnet Access over IPv6
- Information About Telnet Access over IPv6
- Telnet Access over IPv6
- How to Enable Telnet Access over IPv6
- Enabling Telnet Access to an IPv6 Device and Establishing a Telnet Session
- Configuration Examples for Telnet Access over IPv6
- Examples: Enabling Telnet Access to an IPv6 Device
- Additional References
- Feature Information for Telnet Access over IPv6
Telnet Access over IPv6
The Telnet client and server in the Cisco software support IPv6 connections.
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 Telnet Access over IPv6
Telnet Access over IPv6
The Telnet client and server in Cisco software support IPv6 connections. A user can establish a Telnet session directly to the device using an IPv6 Telnet client, or an IPv6 Telnet connection can be initiated from the device. A vty interface and password must be created in order to enable Telnet access to an IPv6 device.
How to Enable Telnet Access over IPv6
Enabling Telnet Access to an IPv6 Device and Establishing a Telnet Session
DETAILED STEPS
Configuration Examples for Telnet Access over IPv6
Examples: Enabling Telnet Access to an IPv6 Device
The following examples provide information on how to enable Telnet and start a session to or from an IPv6 device. 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.
Device# configure terminal Device(config)# ipv6 host cisco-sj 2001:DB8:20:1::12 Device(config)# end Device# 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 device, create a vty interface and password:
Device(config)# line vty 0 4 password lab login
To use Telnet to access the device, you must enter the password:
Device# 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:
Device# cisco-sj
or
Device# 2001:DB8:20:1::12
To display the IPv6 connected user (line 130) on the device to which you are connected, use the show users command:
Device# 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:
Device# 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 device suspends the session with ^6x and then enters the show sessions command, the IPv6 connection is displayed:
Device# 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:
Device# 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
Additional References
Related Documents
| Related Topic | Document Title |
|---|---|
|
IPv6 addressing and connectivity |
IPv6 Configuration Guide |
|
Cisco IOS commands |
|
|
IPv6 commands |
Cisco IOS IPv6 Command Reference |
|
Cisco IOS IPv6 features |
Cisco IOS IPv6 Feature Mapping |
MIBs
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 Telnet Access over IPv6
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 Telnet Access over IPv6 |
| Feature Name | Releases | Feature Information |
|---|---|---|
|
Telnet Access over IPv6 |
12.2(2)T 12.2(18)SXE 12.2(25)SEA 12.2(25)SG 12.2(33)SRA 15.0(2)SG Cisco IOS XE Release 2.1 Cisco IOS XE Release 3.2SG |
Telnet access over IPv6 is supported. The following commands were introduced or modified: ipv6 access-class, ipv6 host. |
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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.