2.3 Credentials, Network Groups, Protocols

A Credential is the login/security (username/password) information of each device. You have to specify login credential information within netLD in order to let it access a device. Information can be added in the Credentials window, accessible via Inventory → Credentials.

                       Figure 2.3.1: Credentials window.


In Credentials window, it is recommended you enter all the information needed to access the devices (username, password, SNMP community, etc.). If there is any lack of credential information, it may lead to login failure and associated operations may fail, e.g. reading and writing information, backup or compare would not be successful. Credentials contains the following information:



VTY Username/password

The username/password required by the login shell on each network device. The login shell can be one of ssh and/or rlogin remote terminal. Note that VTY stands for virtual tty console.

Enable Username

Enable Secret/Password

Administrative Username that is required when you modify the configuration.

One of the two kinds of passwords for CISCO


SNMP Get Community

SNMPv3 Authentication Username

SNMPv3 Authentication Password

SNMPv3 Privacy Password

These correspond to each field in the SNMP data- gram.

The name of Get Community in SNMP.

The name of Authorization Community defined in SNMPv3.

The community’s login password defined in SNMPv3.

The password used for the encryption during the connection.

2.3.1 Network Group

A set of credentials forms a Network Group. A network group can be defined by the list of IP Address Ranges. Each network group may contain many credential sets. When netLD attempts to log in to a device, it looks up the network group via the corresponding IP address specified – if there is a match then netLD uses those credentials. If more than one credential set is defined in a network group, netLD tries each credential in the list, from top to bottom, to attempt to access the device.

Note that the IP ranges should be pairwise disjoint among network groups, or the incorrect credential might be applied to the devices. This will lead to the backup failure. In the initial configuration, there is only network group, Default.

2.3.2 Protocols

Protocols specify the measure/standards used to connect the devices. Just like credentials, protocols used by netLD can be customized in Inventory → Protocols.

For each protocol, you can define several network groups defined by an IP range, just like in Credentials. Please note that network groups for credentials and for protocols are not associated by its name. They are named independently and no relevance is detected.

In each network group, you can specify a list of protocols to be used for the given IP range. The list is tried, upon connection, from top to bottom.

Initially, only the Default network group exists, and it is used by default.

                         Figure 2.3.2: Protocols window.


In each input field,

• Check the checkbox if the protocol could be used during a backup and other operations. In the Default network group, all protocols are checked by default.

• Up/down arrow buttons move the order in the list and change the priority of the protocol. netLD tries to use the protocol of the top priority. If it fails, then it tries to connect with the protocol of the next priority.

• To add a new protocol specification, click on the and enter a name of the group.

• Enter the IP address ranges in Add address (IP, CIDR, Wildcard or Range)

field. Click on the to add it to the list on the left.