Cisco OL-21636-01 - Manual (Page 22)

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Cisco IP Solution Center L2VPN and Carrier Ethernet User Guide, 6.0
OL-21636-01
Chapter 2 Setting Up the ISC Services
Configuring Device Settings to Support ISC
Configuring Device Settings to Support ISC
Two device settings must be configured to support the use of ISC in the network:
• Switches in the network must be operating in VTP transparent mode.
• Loopback addresses must be set on N-PE devices.
Note These are the two minimum device settings required for ISC to function properly in the network. You
must, of course, perform other device configuration steps for the proper functioning of the devices in the
network.
Configuring Switches in VTP Transparent Mode
For security reasons, ISC requires VTPs to be configured in transparent mode on all the switches
involved in ERS or EWS services before provisioning L2VPN service requests. To set the VTP mode,
enter the following Cisco IOS commands:
Switch# configure terminal
Switch(config)# vtp mode transparent
Enter the following Cisco IOS command to verify that the VTP mode has changed to transparent:
Switch# Show vtp status
Setting the Loopback Addresses on N-PE Devices
The loopback address for the N-PE has to be properly configured for an Any Transport over MPLS
(AToMPLS) connection. The IP address specified in the loopback interface must be reachable from the
remote pairing PE. The label distribution protocol (LDP) tunnels are established between the two
loopback interfaces of the PE pair. You set the PE loopback address in the Edit PE device window.
Access the Edit PE device window in ISC by doing the following steps.
Step 1 Choose Service Inventory > Inventory and Connection Manager.
Step 2 Choose PE Devices in the Selection window.
Step 3 Choose a specific device and click the Edit button.
To prevent a wrong loopback address being entered into the system, the loopback IP address field on the
GUI is read-only. You choose the loopback address with the help of a separate pop-up window, which
you access by clicking the Select button. This ensures that you choose only a valid loopback address
defined on the device.
To further narrow the search, you can check the LDPTermination Only check box and click the Select
button. This limits the list to the LDP-terminating loopback interface(s).