Discovery times out while discovering the bridge MIB or the Network Aggregation Group

Products

• VMware Smart Assurance

Issue/Introduction

Symptoms:

Discovery times out while discovering the bridge MIB or the Network Aggregation Group.

IP DiscoveryError shows timeout error on request for Bridge MIB OID .1.3.6.1.2.1.17.

Cannot discover connections between devices in the VMWare Smart Assurance IP Availability Manager.

Environment

SMARTS-10.1.x

Cause

• MIB readonly community string does contains "@" characters. For Cisco devices, the @ symbol tells the SNMP agent that everything after the "@" symbol is a "context". 
• This is typically used to query a specific VLAN for bridging information, and would look something like this for example:

public@vlan2222

• The above would return information regarding VLAN 2222 using the community string "public".

Resolution

• Check to ensure that the readonly community string does not contain any "@" characters. See the following article on the Cisco website for more information. Look in the section entitled, "snmp-server community":

http://www.cisco.com/en/US/docs/ios/netmgmt/command/reference/nm_17.html