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Understanding the IP Discovery process

The IP Discovery process is as follows:

1. Network Management Console queries the first subnet from the list. When the

subnet definition is router-based, Network Management Console queries the

specified router for its interfaces using the standard interface MIB query. Once the

subnet mask is determined it continues with the discovery.

Note:

Make sure that the Actions > Dicovery Interfaces check box is selected in case

of a router-based discovery.

2. Network Management Console retrieves the parameters of the first SNMP

community string from the SNMP list.

Note:

The SNMP versions and community strings used during discovery are defined in

Network Management Console's File > Options > SNMP Access page.

Community strings are processed from the top to the bottom, so smaller the index,

the sooner the SNMP community string will be tested during discovery.

3. Network Management Console sends a standard MIB query to each IP address in

the given subnet for getting the “sysoid” value of the device using the community

string parameters.

4. When SNMP timeout value expires and no reply is received to the query,Network

Management Console attempts to send additional queries until the number of

SNMP retries value expires. Otherwise Network Management Console proceeds

with step 6.

5. When no SNMP response is received after both SNMP timeout and SNMP retries

have expired, Network Management Console processes the next community string

from the list and continues with step 3.

6. Network Management Console queries the “sysname” SNMP MIB value to get the

system name.

7. If the Actions > Dicovery Interfaces check box is selected, Network Management

Console will query the device for all of it’s IP interfaces using the IP-MIB. The

interface list will be associated with the device and will be displayed in Network

Management Console unless the interface IP address is excluded according to the

list of excluded IP addresses. Also, whenNetwork Management Console detects

that the interface connects a subnet that is not listed in the the subnet list of IP

Discovering your network

102 Avaya Integrated Management Network Management Console User Guide November 2010

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Avaya Integrated Management Network Management Console Guia do Utilizador Página 102