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SVLive1 Switch Configuration

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SNMP Communication

Serraview MLS uses SNMP to communicate with the network switches. SNMP utilizes UDP (User Datagram Protocol) as its communications protocol, which does not guarantee delivery. If there are any network bandwidth problems, the reliability of switch scans can be impacted as UDP traffic may be disregarded.

SVLive1 supports both SNMPv2c and SNMPv3 but only one of the two can be used.

SNMP Requirements

SNMPv2c

  • Community string MUST NOT have spaces (one word).
  • Community string MUST NOT contain "@" character.

SNMPv3

Username MUST NOT have spaces (one word).

Authentication and Privacy passphrase MUST NOT include the "@" character.

MLS Communication to network switches

MLS efficiently queries only the information it needs from the network switches. It has two types of scans, a full scan and a partial scan.  

For a partial scan, MLS will query: 

  • Only each VLAN that has activity
  • MAC addresses
  • Switch Port index
  • IP address (if switch is operating as a layer 3 and supports SNMP v2 / IP address OIDs)

For a full scan, MLS will query: 

  • Which VLANs are available
  • Each VLAN to determine those with activity
  • MAC addresses
  • Switch Port index
  • IP address (if switch is operating as a layer 3 and supports SNMP v2 / IP address OIDs)
  • Bridging table
  • Switch Ports
  • Switch Port Labels

The polling frequency is configurable for each scan type. We recommend that MLS be configured to:

  • Perform full scans daily, out of hours.
  • Perform partial scans at a frequency less than the switch-ageing timer (the time a switch holds on to its mac address to port pairing).

SNMP OIDs for Switch Querying

SNMPv3

OidvtpVlanEntry = .1.3.6.1.4.1.9.9.46.1.3.1.1; 
OiDvtpVlanState = .1.3.6.1.4.1.9.9.46.1.3.1.1.2; 
OiDdot1DTpFdbAddress = .1.3.6.1.2.1.17.4.3.1.1; 
OiDdot1DTpFdbPort = .1.3.6.1.2.1.17.4.3.1.2; 
OiDdot1DBasePortIfIndex= .1.3.6.1.2.1.17.1.4.1.2; 
OiDifName = .1.3.6.1.2.1.31.1.1.1.1; 
OiDifLabel = .1.3.6.1.2.1.2.2.1.2; 
OiDifAlias = .1.3.6.1.2.1.31.1.1.1.18;
entLogicalCommunity = .1.3.6.1.2.1.47.1.2.1.1.4
entLogicalContextName= .1.3.6.1.2.1.47.1.2.1.1.8

SNMPv2

OidvtpVlanEntry = .1.3.6.1.4.1.9.9.46.1.3.1.1; 
OiDvtpVlanState = .1.3.6.1.4.1.9.9.46.1.3.1.1.2; 
OiDdot1DTpFdbAddress = .1.3.6.1.2.1.17.4.3.1.1; 
OiDdot1DTpFdbPort = .1.3.6.1.2.1.17.4.3.1.2; 
OiDdot1DBasePortIfIndex= .1.3.6.1.2.1.17.1.4.1.2; 
OiDifName = .1.3.6.1.2.1.31.1.1.1.1; 
OiDifLabel = .1.3.6.1.2.1.2.2.1.2; 
OiDifAlias = .1.3.6.1.2.1.31.1.1.1.18;