The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
The Per VRF for TACACS+ Servers feature allows per virtual route forwarding (per VRF) to be configured for authentication, authorization, and accounting (AAA) on TACACS+ servers.
TACACS+ server access is required.
Experience configuring TACACS+, AAA and per VRF AAA, and group servers is necessary.
The VRF instance must be enabled globally on the router before per VRF for a TACACS+ server is configured.
The Per VRF for TACACS+ Servers feature allows per VRF AAA to be configured on TACACS+ servers. Prior to Cisco IOS XE Release 2.2, this functionality was available only on RADIUS servers.
The initial steps in this procedure are used to configure AAA and a server group, create a VRF routing table, and configure an interface. Steps 10 through 13 are used to configure the per VRF on a TACACS+ server feature:
| Command or Action | Purpose | |
|---|---|---|
|
Step 1 |
enable Example: |
Enables privileged EXEC mode.
|
|
Step 2 |
configure terminal Example: |
Enters global configuration mode. |
|
Step 3 |
ip vrf vrf-name Example: |
Configures a VRF table and enters VRF configuration mode. |
|
Step 4 |
rd route-distinguisher Example: |
Creates routing and forwarding tables for a VRF instance. |
|
Step 5 |
exit Example: |
Exits VRF configuration mode. |
|
Step 6 |
interface interface-name Example: |
Configures an interface and enters interface configuration mode. |
|
Step 7 |
ip vrf forwarding vrf-name Example: |
Configures a VRF for the interface. |
|
Step 8 |
ip address ip-address mask [secondary ] Example: |
Sets a primary or secondary IP address for an interface. |
|
Step 9 |
exit Example: |
Exits interface configuration mode. |
|
Step 10 |
aaa group server tacacs+ group-name Example: |
Groups different TACACS+ server hosts into distinct lists and distinct methods and enters server-group configuration mode. |
|
Step 11 |
server-private {ip-address | name } [nat ] [single-connection ] [port port-number ] [timeout seconds ] [key [0 | 7 ] string ] Example: |
Configures the IP address of the private TACACS+ server for the group server. |
|
Step 12 |
ip vrf forwarding vrf-name Example: |
Configures the VRF reference of a AAA TACACS+ server group. |
|
Step 13 |
ip tacacs source-interface subinterface-name Example: |
Uses the IP address of a specified interface for all outgoing TACACS+ packets. |
|
Step 14 |
exit Example: |
Exits server-group configuration mode. |
To verify the per VRF TACACS+ configuration, perform the following steps:
 Note |
The debug commands may be used in any order. |
 Caution |
Enabling debug CLI can cause performance degradation on the router. Use of debug commands for large number of sessions is not recommended. |
| Command or Action | Purpose | |
|---|---|---|
|
Step 1 |
enable Example: |
Enables privileged EXEC mode.
|
|
Step 2 |
debug tacacs authentication Example: |
Displays information about AAA/TACACS+ authentication. |
|
Step 3 |
debug tacacs authorization Example: |
Displays information about AAA/TACACS+ authorization. |
|
Step 4 |
debug tacacs accounting Example: |
Displays information about accountable events as they occur. |
|
Step 5 |
debug tacacs packets Example: |
Displays information about TACACS+ packets. |
The following output example shows that the group server tacacs1 is configured for per VRF AAA services:
aaa group server tacacs+ tacacs1
server-private 10.1.1.1 port 19 key cisco
ip vrf forwarding cisco
ip tacacs source-interface Loopback0
ip vrf cisco
rd 100:1
interface Loopback0
ip address 10.0.0.2 255.0.0.0
ip vrf forwarding ciscoThe following sections provide references related to Per VRF for TACACS+ Servers..
|
Related Topic |
Document Title |
|---|---|
|
Configuring TACACS+ |
Configuring TACACS+ module. |
|
Per VRF AAA |
Per VRF AAA module. |
|
Security commands |
Cisco IOS Security Command Reference |
|
Standard |
Title |
|---|---|
|
No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature. |
-- |
|
MIB |
MIBs Link |
|---|---|
|
No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature. |
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: |
|
RFC |
Title |
|---|---|
|
No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature. |
-- |
|
Description |
Link |
|---|---|
|
The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password. |
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 |
|---|---|---|
|
Per VRF for TACACS+ Servers |
Cisco IOS XE Release 2.2 |
The Per VRF for TACACS+ Servers feature allows per virtual route forwarding (per VRF) to be configured for authentication, authorization, and accounting (AAA) on TACACS+ servers. In Cisco IOS XE Release 2.2, this feature was introduced on the Cisco ASR 1000 Series Aggregation Services Routers. The following commands were introduced or modified: ip tacacs source-interface , ip vrf forwarding (server-group) , server-private (TACACS+) . |
Feedback