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Viptela Documentation

VPN Interface T1/E1

Use the VPN Interface T1/E1 template for all Cisco devices running Viptela software.

To configure the T1/E1 interfaces in a VPN using vManage templates:

  1. Create a VPN Interface T1/E1 feature template to configure T1/E1 interface parameters, as described in this article.
  2. Create a T1/E1 Controller template to configure the T1 or E1 network interface module (NIM) parameters. See the T1/E1 Controller help topic.
  3. Create a VPN feature template to configure VPN parameters. See the VPN help topic.

Navigate to the Template Screen and Name the Template

  1. In vManage NMS, select the Configuration ► Templates screen.
  2. In the Device tab, click Create Template.
  3. From the Create Template drop-down, select From Feature Template.
  4. From the Device Model drop-down, select the type of device for which you are creating the template.
  5. To create a template for VPN 0 or VPN 512:
    1. Click the Transport & Management VPN tab located directly beneath the Description field, or scroll to the Transport & Management VPN section.
    2. Under Additional VPN 0 Templates, located to the right of the screen, click VPN Interface.
    3. From the VPN Interface drop-down, click Create Template. The VPN Interface T1/E1 template form is displayed. The top of the form contains fields for naming the template, and the bottom contains fields for defining VPN Interface Ethernet parameters.
  6. To create a template for VPNs 1 through 511, and 513 through 65530:
    1. Click the Service VPN tab located directly beneath the Description field, or scroll to the Service VPN section.
    2. Click the Service VPN drop-down.
    3. Under Additional VPN templates, located to the right of the screen, click VPN Interface.
    4. From the VPN Interface drop-down, click Create Template. The VPN Interface Ethernet template form is displayed. The top of the form contains fields for naming the template, and the bottom contains fields for defining VPN Interface Ethernet parameters.

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  7. In the Template Name field, enter a name for the template. The name can be up to 128 characters and can contain only alphanumeric characters.
  8. In the Template Description field, enter a description of the template. The description can be up to 2048 characters and can contain only alphanumeric characters.

When you first open a feature template, for each parameter that has a default value, the scope is set to Default (indicated by a check mark), and the default setting or value is shown. To change the default or to enter a value, click the scope drop-down to the left of the parameter field and select one of the following:

Parameter Scope

Scope Description

Device Specific (indicated by a host icon)

Use a device-specific value for the parameter. For device-specific parameters, you cannot enter a value in the feature template. You enter the value when you attach a Viptela device to a device template.

When you click Device Specific, the Enter Key box opens. This box displays a key, which is a unique string that identifies the parameter in a CSV file that you create. This file is an Excel spreadsheet that contains one column for each key. The header row contains the key names (one key per column), and each row after that corresponds to a device and defines the values of the keys for that device. You upload the CSV file when you attach a Viptela device to a device template. For more information, see Create a Template Variables Spreadsheet.

To change the default key, type a new string and move the cursor out of the Enter Key box.

Examples of device-specific parameters are system IP address, hostname, GPS location, and site ID.

Global (indicated by a globe icon)

Enter a value for the parameter, and apply that value to all devices.

Examples of parameters that you might apply globally to a group of devices are DNS server, syslog server, and interface MTUs.

Configure Basic Interface Functionality

To configure basic interface functionality in a VPN, select the Basic Configuration tab and configure the following parameters. Parameters marked with an asterisk are required to configure an interface.

Parameter Name Description
Shutdown* Click No to enable the interface.
Interface name* Enter a name for the interface
Description Enter a description for the interface.
IPv4 Address*

Enter an IPv4 address.

 

IPv6 Address*

Enter an IPv6 address.

 

Bandwidth Upstream For transmitted traffic, set the bandwidth above which to generate notifications.
Range: 1 through (232 / 2) – 1 kbps
Bandwidth Downstream For received traffic, set the bandwidth above which to generate notifications.
Range: 1 through (232 / 2) – 1 kbps
IP MTU Specify the maximum MTU size of packets on the interface.
Range: 576 through 1804
Default: 1500 bytes

To save the feature template, click Save.

Create a Tunnel Interface

You can configure up to four tunnel interfaces. This means that each vEdge router can have up to four TLOCs.

For the control plane to establish itself so that the overlay network can function, you must configure WAN transport interfaces in VPN 0.

To configure a tunnel interface, select the Interface Tunnel tab and configure the following parameters:

Parameter Name Description
Tunnel Interface Click On to create a tunnel interface.
Color Select a color for the TLOC.
Control Connection If the router has multiple TLOCs, click No to have the tunnel not establish a TLOC. The default is On, which establishes a control connection for the TLOC.
Maximum Control Connections

Specify the maximum number of vSmart controllers that the WAN tunnel interface can connect to. To have the tunnel establish no control connections, set the number to 0.

Range: 0 through 8
Default: 2

vBond As Stun Server Click On to enable Session Traversal Utilities for NAT (STUN) to allow the tunnel interface to discover its public IP address and port number when the vEdge router is located behind a NAT.
Exclude Controller Group List Set the vSmart controllers that the tunnel interface is not allowed to connect to.
Range: 0 through 100
vManage Connection Preference Set the preference for using a tunnel interface to exchange control traffic with the vManage NMS.
Range: 0 through 8
Default: 5
Port Hop Click On to enable port hopping, or click Off to disable it. If port hopping is enabled globally, you can disable it on an individual TLOC (tunnel interface). To control port hopping on a global level, use the System configuration template.
Default: Enabled (on vEdge routers); disabled (on vManage NMSs and vSmart controllers)
Low-Bandwidth Link Select to characterize the tunnel interface as a low-bandwidth link.
Allow Service Select On or Off for each service to allow or disallow the service on the interface.

To configure additional tunnel interface parameters, click Advanced Options:

Parameter Name Description
Encapsulation

Select the encapsulation type to use on the tunnel interface, either IPsec or GRE. The default is IPsec.

If you select both IPsec and GRE encapsulations, two TLOCs are created for the tunnel interface that have the same IP addresses and colors, but that differ by their encapsulation.

IPsec By default, IPsec is enabled on the tunnel interface. To disable IPsec, click Off.
IPsec Preference

Specify a preference value for directing traffic to the tunnel. A higher value is preferred over a lower value.

Range: 0 through 4294967295
Default: 0

IPsec Weigh

Enter a weight to use to balance traffic across multiple TLOCs. A higher value sends more traffic to the tunnel.

Range: 1 through 255
Default: 1

Carrier

Select the carrier name or private network identifier to associate with the tunnel.

Values: carrier1, carrier2, carrier3, carrier4, carrier5, carrier6, carrier7, carrier8, default
Default: default

Bind Loopback Tunnel Enter the name of a physical interface to bind to a loopback interface.
Last-Resort Circuit Select to use the tunnel interface as the circuit of last resort.
NAT Refresh Interval Enter the interval between NAT refresh packets sent on a DTLS or TLS WAN transport connection.
Range: 1 through 60 seconds
Default: 5 seconds
Hello Interval

Enter the interval between Hello packets sent on a DTLS or TLS WAN transport connection.
Range: 100 through 10000 milliseconds
Default: 1000 milliseconds (1 second)

Hello Tolerance

Enter the time to wait for a Hello packet on a DTLS or TLS WAN transport connection before declaring that transport tunnel to be down.

Range: 12 through 60 seconds
Default: 12 seconds

To save the feature template, click Save.

Apply Access Lists and QoS Parameters (on vEdge Routers)

To configure a shaping rate to a router interface and to apply a QoS map, a rewrite rule, access lists, and policers to a router interface, select the ACLtab and configure the following parameters:

Parameter Name Description
Shaping Rate Configure the aggregate traffic transmission rate on the interface to be less than line rate, in kilobits per second (kbps).
QoS Map Specify the name of the QoS map to apply to packets being transmitted out the interface.
Rewrite Rule Click On, and specify the name of the rewrite rule to apply on the interface.
Ingress ACL – IPv4

Click On, and specify the name of the access list to apply to IPv4 packets being received on the interface.

Egress ACL – IPv4 Click On, and specify the name of the access list to apply to IPv4 packets being transmitted on the interface.
Ingress ACL – IPv6

Click On, and specify the name of the access list to apply to IPv6 packets being received on the interface.

Egress ACL – IPv6 Click On, and specify the name of the access list to apply to IPv6 packets being transmitted on the interface.
Ingress Policer Click On, and specify the name of the policer to apply to packets received on the interface.
Egress Policer Click On, and specify the name of the policer to apply to packets being transmitted on the interface.

To save the feature template, click Save.

Configure Other Interface Properties

To configure other interface properties, select the Advanced tab and configure the following parameters:

Parameter Name Description
PMTU Discovery Click On to enable path MTU discovery on the interface. PMTU determines the largest MTU size that the interface supports so that packet fragmentation does not occur.
TCP MSS Specify the maximum segment size (MSS) of TPC SYN packets passing through the vEdge router. By default, the MSS is dynamically adjusted based on the interface or tunnel MTU such that TCP SYN packets are never fragmented.
Range: 552 to 1460 bytes
Default: None
Clear-Dont-Fragment

Click On to clear the Don't Fragment (DF) bit in the IPv4 packet header for packets being transmitted out the interface. When the DF bit is cleared, packets larger than that interface's MTU are fragmented before being sent.

Static Ingress QoS

Specify a queue number to use for incoming traffic.
Range: 0 through 7

Autonegotiation Click Off to turn off autonegotiation. By default, an interface runs in autonegotiation mode.
TLOC Extension Enter the name of a physical interface on the same router that connects to the WAN transport. This configuration then binds this service-side interface to the WAN transport. A second vEdge router at the same site that itself has no direct connection to the WAN (generally because the site has only a single WAN connection) and that connects to this service-side interface is then provided with a connection to the WAN.

Release Information

Introduced in vManage NMS Release 18.2.

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