Network switch and router discovery

  • リリースバージョン: Australia
  • 更新日 2026年03月12日
  • 所要時間：17分

    • Discovery identifies and classifies information about network switches and routers.

    Network switches and routers often have very similar capabilities. It is very common for some switches known as Layer 3 switches to have IP routing. Larger routers with optional modules might accept switching modules. Because of these overlaps and the resulting ambiguity of a particular device's classification, Discovery collects the same data for both routers and switches, if it is available in any given device. For details on how Discovery collects data about connections between network devices and other components, see Layer 2 discovery.
    注:
    For information on Probe to Pattern migration see the knowledge article KB0694477.

    Prerequisites

    • The router or switch needs to have IP Address information.
    • The system property glide.discovery.L3_mapping is set to true to discover routers and switches.
    • The router or Layer 3 switch that provides the IP Address needs to have been successfully discovered with populated Exit Interface Routing Rules.
    • If you must populate the [discovery_device_neighbors] table during horizontal layer 2 discovery of the bgp-enabled devices, set the BGP router exploration disable property to No. Notice that enabling this property can cause performance issues including out-of-memory issues on the MID Server.

    System properties

    You can configure many aspects of Discovery to work according to your personal preferences. The following properties apply to network routers and switches. To view the properties, navigate to Discovery Definition > Properties unless indicated otherwise.
    Property Description
    glide.discovery.L3_mapping This creates IP Connecton::IP Connection relation between servers and network devices.
    • Type: string
    • Default value: true
    • Location: System Property [sys_properties] table
    glide.discovery.max_concurrent_invocations_per_schedule Sets a maximum number of scheduled invocations of the same Discovery schedule. It prevents a backlog of scheduled runs if Discovery does not finish before the next invocation is scheduled to run. The value is an integer that represents the max number of automated invocations of the same schedule that may proceed at one time. If the limit has been reached, subsequent scheduled invocations are canceled. A value of 0 or any negative number disables this property.
    • Type: integer
    • Default value: 3
    • Location: Discovery Definition > Properties
    注:
    This property does not apply to schedules that have a 'Run after' configuration set to 'Even if canceled'.
    For a list of properties used in discovery in general, see Discovery properties.

    Credentials

    Discovery explores many kinds of devices, such as switches, routers, and printers, using the SNMP protocol. SNMP Community Credentials do not include a user name, just a password, which is the community string. The default read-only community string for many SNMP devices is public, and Discovery will try that automatically. SNMPv3 credentials require a user name and a key, depending on the protocol selected. Enter the appropriate SNMP credentials if they differ from the public community string.

    注:
    SSH is not supported for routers and switches, but is supported for load balancers.

    Classifier, pattern, and probes

    Classifiers Trigger probes Pattern
    Standard Network Router

    Standard Network Switch
    • Horizontal Pattern: launches patterns
    • SNMP-Routing^
    • DNS*
    • SNMP-Identity*
    • SNMP-Switch-Vlan*
    • SNMP-Switching*
    • SNMP - Network - ArpTable* (Standard Network Switch only)
    		 Network Router

    Network Switch

    *For new instances, these probes are inactive on the classifier. Discovery uses patterns for discovery.

    ^This probe remains active by default for the Standard Network Router classifier, even when Discovery uses pattern discovery.

    To use patterns, verify that the correct pattern is specified in the horizontal pattern probe on the classifier. See Add the Horizontal Pattern probe to a classifier for instructions.

    Discovering stacked switches

    The Network Switch shared library supports Cisco stacked switches. The CI table for this is IP Switch [cmdb_ci_ip_switch]. Multiple switches in the stack are identified by the primary IP address. Each member of the stack is identified by a combination of elements, including the primary IP address, a name associated with the switch, and the stack mode. The relationship is created between a primary and all of the secondaries. The primary switch has all the fields listed in the table below. The secondary switch has name, serial_number, model_id, manufacturer, stack, and stack_mode.
    注:
    If all the ports on a switch are open for port 161, that switch will have multiple IPs (one for each port) but the serial number for all the ports is the same. The CI identification is performed based on the serial number, therefore the same record is updated every time instead of creating a new record.

    Router and switch data

    Table name Label/Field name Source
    cmdb_ci

    Serial Number

    serial_number

    		 SNMP, various MIBs
    cmdb_ci

    Manufacturer

    manufacturer

    		 SNMP, RFC1213 MIB
    cmdb_ci

    Model ID

    model id

    		 SNMP, RFC1213 MIB
    cmdb_ci_ip_router

    Name

    name
    cmdb_ci_ip_router

    Model ID

    model ID

    		 SNMP, RFC1213 MIB
    cmdb_ci_ip_router

    Manufacturer

    manufacturer

    		 SNMP, RFC1213 MIB
    cmdb_ci_ip_router

    Serial Number

    serial_number

    		 SNMP, various MIBs
    cmdb_ci_ip_router

    IP Address

    ip_address

    		 SNMP, IP MIB
    cmdb_ci_ip_router

    Description

    short_description
    cmdb_ci_ip_router

    Can route IP

    can_route

    		 SNMP, IP MIB, BGP MIB
    cmdb_ci_ip_router

    Can switch IP

    can_switch

    		 SNMP, dot1dBridge MIB
    cmdb_ci_ip_router

    Port

    port
    cmdb_ci_ip_switch

    Name

    name
    cmdb_ci_ip_switch

    Model ID

    model ID

    		 SNMP, RFC1213 MIB
    cmdb_ci_ip_switch

    Manufacturer

    manufacturer

    		 SNMP, RFC1213 MIB
    cmdb_ci_ip_switch

    Serial Number

    serial_number

    		 SNMP, various MIBs
    cmdb_ci_ip_switch

    IP Address

    ip_address

    		 SNMP, IP MIB
    cmdb_ci_ip_switch

    Description

    short_description
    cmdb_ci_ip_switch

    Can route IP

    can_route

    		 SNMP, IP MIB, BGP MIB
    cmdb_ci_ip_switch

    Ports

    ports

    		 SNMP, dot1dBridge MIB
    cmdb_ci_ip_switch

    Can switch IP

    can_switch

    		 SNMP, dot1dBridge MIB
    cmdb_ci_ip_switch

    Can partition VLANs

    can_partitionvlans

    		 SNMP, dot1dBridge MIB
    cmdb_ci_ip_switch

    Stack

    stack

    		 SNMP, entPhysicalTable
    cmdb_ci_ip_switch

    Stack Mode

    stack_mode

    		 SNMP, entPhysicalTable
    cmdb_ci_netgear

    Can route IP

    can_route

    		 SNMP, IP MIB, BGP MIB
    cmdb_ci_netgear

    Can switch IP

    can_switch

    		 SNMP, dot1dBridge MIB
    cmdb_ci_netgear

    Can partition VLANs

    cdscy_router_interface

    		 SNMP, dot1dBridge MIB
    cmdb_ci_netgear

    Can Hub

    can_hub

    		 SNMP, IP MIB
    cmdb_ci_network_adapter

    IP Address

    ip_address

    		 SNMP, IP MIB
    cmdb_ci_network_adapter

    MAC Address

    mac_address

    		 SNMP, IF MIB
    discovery_device_neighbors

    Neighbor Address

    neighbor_address

    		 ciscoCdpMIB
    discovery_device_neighbors

    Neighbor ID

    neighbor_ID

    		 ciscoCdpMIB, lldpMIB
    discovery_device_neighbors

    Neighbor Interface

    neighbor_interface

    		 ciscoCdpMIB, lldpMIB
    discovery_device_neighbors

    Neighbor Source

    neighbor_source

    		 ciscoCdpMIB, lldpMIB
    discovery_device_neighbors

    Origin Interface

    origin_interface

    		 ciscoCdpMIB, lldpMIB
    discovery_net_arp_table

    IP Address

    IP_address

    		 SNMP, IP MIB
    discovery_net_arp_table

    MAC Address

    mac_address

    		 SNMP, IP MIB
    discovery_switch_bridge_port_table

    Interface Index

    interface_index

    		 SNMP, dot1dBridge MIB
    discovery_switch_bridge_port_table

    Port

    port

    		 SNMP, dot1dBridge MIB
    discovery_switch_fwd_table

    MAC Address

    mac_address

    		 SNMP, dot1dBridge MIB
    discovery_switch_fwd_table

    Port

    port

    		 SNMP, dot1dBridge MIB
    discovery_switch_fwd_table

    Status

    status

    		 SNMP, dot1dBridge MIB
    discovery_switch_fwd_table

    VLAN ID

    vlan_id

    		 SNMP, dot1dBridge MIB
    discovery_switch_spanning_tree_table

    Designated Bridge MAC

    designated_bridge_mac

    		 SNMP, dot1dBridge MIB
    discovery_switch_spanning_tree_table

    Designated Root

    designated_root

    		 SNMP, dot1dBridge MIB
    discovery_switch_spanning_tree_table

    Port

    port

    		 SNMP, dot1dBridge MIB
    discovery_switch_spanning_tree_table

    Port Enable

    port_enable

    		 SNMP, dot1dBridge MIB
    discovery_switch_spanning_tree_table

    Port State

    port_state

    		 SNMP, dot1dBridge MIB
    dscy_router_interface

    Name

    name

    		 SNMP, IP MIB
    dscy_router_interface

    Type

    type

    		 SNMP, IP MIB
    dscy_router_interface

    Number

    number

    		 SNMP, IP MIB
    dscy_router_interface

    IP Address

    ip_address

    		 SNMP, IP MIB
    dscy_router_interface

    MAC Address

    mac_address

    		 SNMP, IP MIB
    dscy_route_interface

    Destination Network

    dest_ip_network

    		 SNMP, IP MIB
    dscy_route_interface

    Type

    type

    		 SNMP, IP MIB
    dscy_route_next_hop

    Destination Network

    dest_ip_network

    		 SNMP, IP MIB
    dscy_route_next_hop

    Type

    type

    		 SNMP, IP MIB
    dscy_route_next_hop

    Next Hop

    next_hop_ip_address

    		 SNMP, IP MIB
    dscy_switchport

    Type

    type

    		 SNMP, dot1dBridge MIB
    dscy_switchport

    Status

    status

    		 SNMP, dot1dBridge MIB
    dscy_switchport

    MAC Address

    mac_address

    		 SNMP, dot1dBridge MIB
    dscy_switchport

    Port Number

    port_number

    		 SNMP, dot1dBridge MIB
    dscy_switchport

    Interface Name

    interface_name

    		 SNMP, dot1dBridge MIB
    dscy_switchport

    Interface Number

    interface_number

    		 SNMP, dot1dBridge MIB
    dscy_swtch_fwd_rule

    MAC Address

    mac_address

    		 SNMP, dot1dBridge MIB
    dscy_swtch_fwd_rule

    MAC Manufacturer

    mac_mfr

    		 SNMP, dot1dBridge MIB
    dscy_swtch_fwd_rule

    Status

    status

    		 SNMP, dot1dBridge MIB
    dscy_swtch_fwd_rule

    IP address

    ip_address

    		 SNMP, dot1dBridge MIB
    dscy_swtch_fwd_rule

    Netmask

    netmask

    		 SNMP, dot1dBridge MIB
    dscy_swtch_partition

    Base IP Address

    base_ip_address

    		 SNMP, dot1dBridge MIB
    dscy_swtch_partition

    Base MAC Address

    base_mac_address

    		 SNMP, dot1dBridge MIB
    dscy_swtch_partition

    Base Netmask

    base_netmask

    		 SNMP, dot1dBridge MIB
    dscy_swtch_partition

    Type

    type

    		 SNMP, dot1dBridge MIB
    dscy_swtch_partition

    Transparent

    transparent

    		 SNMP, dot1dBridge MIB
    dscy_swtch_partition

    Source Route

    sourceroute

    		 SNMP, dot1dBridge MIB
    dscy_swtch_partition

    Name

    name

    		 SNMP, dot1dBridge MIB
    dscy_swtch_partition

    Status

    status

    		 SNMP, dot1dBridge MIB
    dscy_swtch_partition

    Interface Number

    interface_number

    		 SNMP, dot1dBridge MIB