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This module describes how to manage and troubleshoot Easy Virtual Network (EVN).
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.
There may be occasions when you want to issue several EXEC commands to apply to a single virtual network. In order to reduce the repetitive entering of virtual routing and forwarding (VRF) names for multiple EXEC commands, the routing-context vrf command allows you to set the VRF context of such EXEC commands once, and then proceed using EXEC commands.
The table below shows four EXEC commands in Cisco IOS XE software without routing context and in routing context. Note that in the left column, each EXEC command must specify the VRF. In the right column, the VRF context is specified once and the prompt changes to reflect that VRF; there is no need to specify the VRF in each command.
EXEC Commands CLI without Routing Context | EXEC Routing Context |
---|---|
— |
Router# routing-context vrf red Router%red# |
Router# show ip route vrf red[Routing table output for VRF red] |
Router%red# show ip route[Routing table output for VRF red] |
Router# ping vrf red 10.1.1.1[Ping result using VRF red] |
Router%red# ping 10.1.1.1[Ping result using VRF red] |
Router# telnet 10.1.1.1 /vrf red[Telnet to 10.1.1.1 in VRF red] |
Router%red# telnet 10.1.1.1[Telnet to 10.1.1.1 in VRF red] |
Router# traceroute vrf red 10.1.1.1[Traceroute output in VRF red] |
Router%red# traceroute 10.1.1.1[Traceroute output in VRF red] |
Output of the traceroute command is enhanced to make troubleshooting easier by displaying the incoming VRF name/tag and the outgoing VRF name/tag, as shown in the following example:
Router# traceroute vrf red 10.0.10.12 Type escape sequence to abort. Tracing the route to 10.0.10.12 VRF info: (vrf in name/id, vrf out name/id) 1 10.1.13.15 (red/13,red/13) 0 msec 10.1.16.16 (red/13,red/13) 0 msec 10.1.13.15 (red/13,red/13) 1 msec 2 10.1.8.13 (red/13,red/13) 0 msec 10.1.7.13 (red/13,red/13) 0 msec 10.1.8.13 (red/13,red/13) 0 msec 3 10.1.2.11 (red/13,blue/10) 1 msec 0 msec 0 msec 4 * * *
Using EVN, you can filter debug output per VRF by using the debug condition vrf command. The following is sample output from the debug condition vrf command:
Router# debug condition vrf red Condition 1 set CEF filter table debugging is on CEF filter table debugging is on R1# *Aug 19 23:06:38.178: vrfmgr(0) Debug: Condition 1, vrf red triggered, count 1 R1#
EVN provides a CISCO-VRF-MIB for VRF discovery and management.
To reduce the repeated entering of virtual routing and forwarding (VRF) names when you are issuing EXEC commands on a router, set the routing context of the EXEC commands once, and then proceed with entering them in any order. Perform this task to set the routing context for EXEC mode to a specific VRF, issue EXEC commands, and then restore the system to the global EXEC context.
1. enable
2. routing-context vrf vrf-name
3. show ip route [ip-address [mask] [longer-prefixes] | protocol [process-id] | static download]
4. ping [protocol [tag] {host-name | system-address}]
5. telnet host [port]
6. traceroute [vrf vrf-name | topology topology-name] [protocol] destination
7. routing-context vrf global
1. enable
2. debug vrf {create | delete | error | ha | initialization | interface | ipv4 | ipv6 | issu | lock | lookup | mpls | selection}
Perform this task to map an SNMP v2c context to a VRF. The following SNMP v2c configurations will then be done by the system automatically:
1. enable
2. configure terminal
3. vrf definition vrf-name
4. address-family ipv4
5. snmp context context-name [community community-name [rw | ro]]
Perform this task to map an SNMP v3 context to a virtual routing and forwarding (VRF). The following SNMP v3 configurations will then be done by the system automatically:
1. enable
2. configure terminal
3. vrf definition vrf-name
4. address-family ipv4
5. snmp context context-name [user username [credential | [encrypted] [auth {md5 password | sha password}] [access {access-list-number | access-list-name | ipv6 access-list-name}]]]
Related Topic |
Document Title |
---|---|
Cisco IOS commands |
|
Easy Virtual Network commands |
|
Overview of Easy Virtual Network |
“Overview of Easy Virtual Network” module in the Easy Virtual Network Configuration Guide |
Configuring Easy Virtual Network |
“Configuring Easy Virtual Network” module in the Easy Virtual Network Configuration Guide |
Easy Virtual Network shared services and route replication |
“Easy Virtual Network Shared Services” module in the Easy Virtual Network Configuration Guide |
Description |
Link |
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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. |
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 |
---|---|---|
EVN Cisco EVN MIB |
Cisco IOS XE Release 3.2S 15.0(1)SY 15.1(1)SG Cisco IOS XE Release 3.3SG 15.3(2)T |
EVN Cisco EVN MIB simplifies SNMP configuration. The following command was modified: snmp context. . |
EVN Traceroute |
Cisco IOS XE Release 3.2S 15.0(1)SY 15.1(1)SG Cisco IOS XE Release 3.3SG 15.3(2)T |
EVN Traceroute enhances output of the traceroute command to display the VRF name and tag. The following command was modified: traceroute. . |
EVN VNET Trunk |
Cisco IOS XE Release 3.2S 15.0(1)SY 15.1(1)SG Cisco IOS XE Release 3.3SG 15.3(2)T |
Users can filter debug output per VRF by using the debug condition vrf command. The following commands were introduced: debug condition vrf , debug vrf . |