--- sourceDocument: Yokohama IT Operations Management sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/yokohama/it-operations-management Release : - yokohama ft:locale : - en-US ft:publication_title : - Yokohama IT Operations Management ft:clusterId : - itom bundleId : - itom workflow : - Technology --- # Load balancer fields and probes # Load balancer fields and probes {#ariaid-title1} * Release version: Yokohama * * Updated January 30, 2025 * * ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 4 minutes to read Summarize ![AI sparkle icon](https://servicenow.com/docs/portal-asset/ai-sparkle-icon) Summarized using AI This content was generated using new OpenAI-powered functionality. Results are provided on an as is basis and are not guaranteed to be accurate or complete. ## Summary of Load balancer fields and probes This document details how ServiceNow Discovery collects and stores information about various load balancers using probes and sensors. It covers multiple load balancer types, including Citrix Netscalers, Cisco GSS and CSS, F5 BIG-IP, and generic load balancer components. The data is organized into specific tables within the CMDB, each with fields populated by different discovery probes. It is important to note that this content applies specifically to probe- and sensor-based discovery, not pattern-based discovery used for certain devices like F5 Big-IP. Show full answer Show less By default, the system assigns the discovered IP address of the load balancer as the CI's IP, typically the management IP. There are configuration options to override this and use the NIC IP address instead. ## Key Fields and Probes by Load Balancer Type * **Citrix Netscalers \[cmdbcilbnetscaler\]**: Fields such as Serial Number, Asset Tag, and Model ID are gathered via SNMP probes specific to Netscaler identity. * **Cisco GSS \[cmdbcilbciscogss\]**: Includes Serial Number, Model ID, IP Address, and Manufacturer, collected using Cisco GSS-specific probes. * **Cisco CSS \[cmdbcilbciscocss\]**: Captures Serial Number, Model ID, IP Address, and Manufacturer via SNMP Load Balancer Identity probes. * **F5 BIG-IP \[cmdbcilbbigip\]**: Collects details like Active Modules, Asset Tag, Model ID, Failover Mode, Failover Peer, and Serial Number. Some fields may require form customization to be visible. * **Generic Load Balancer \[cmdbcilb\]**: Tracks Operational Status and Name using multiple probes including Apache, HAProxy, SNMP F5 BIG-IP, and Netscaler. * **Load Balancer Application \[cmdbcilbappl\]**: Fields include Configuration File, Name, IP Address, Last Discovery, and Version from probes like Apache, HAProxy, and Nginx. * **Load Balancer Interface \[cmdbcilbinterface\]**: Contains Status, Load Balancer reference, and Name, populated by several probes. Some fields must be added to the form manually. * **Load Balancer Pool \[cmdbcilbpool\]**: Includes Load Balancing Method, Load Balancer reference, Last Discovery, and Name, sourced from various probes. * **Load Balancer Pool Member \[cmdbcilbpoolmember\]**: Holds Fully Qualified Domain Name, IP Address, Load Balancer, Last Discovery, Name, Pool, and Service Port. Certain fields require form customization. * **Load Balancer Service \[cmdbcilbservice\]**: Tracks Input URL, IP Address, Last Port, Load Balancer, Last Discovery, and Service Port through multiple probes. * **Load Balancer VLAN \[cmdbcilbvlan\]**: Fields include Load Balancer reference, Name, and Tag collected by various probes. ## Additional Notes * Several fields across tables are not visible by default and require form customization to be displayed. * Discovery also gathers data on Apache web server load balancing modules via SSH probes, such as modjk and modproxy. * For detailed Apache web server discovery data, separate documentation should be consulted. ## Practical Application for ServiceNow Customers Understanding these fields and probes helps you verify what load balancer data is collected during Discovery, customize forms to show important but hidden fields, and troubleshoot or enhance your Discovery schedules for load balancers. Knowing which probes populate which fields enables better mapping and validation of your load balancer CIs in the CMDB, ensuring accurate and comprehensive infrastructure data for IT operations and service management. Discovery stores load balancer information in several tables. The information in this topic pertains to discovery with probes and sensors only. If you are using patterns, such as to discover [F5 Big-IP load balancers](https://servicenow-prod.fluidtopics.net/CdSmjjxJaPKXByxudAfv0w "Discovery and Service Mapping can find F5 BIG-IP load balancers via SNMP, SSH, and through the REST API."), see the relevant topic for that type of load balancer. Note: By default, the system uses the discovered IP address of a load balancer for the CI record. This can be the management IP created for the device that is used in the Discovery schedule. For instructions on how to force Discovery to use the IP address of the load balancer's NIC rather than that of a management IP, see [IP address selection properties](https://servicenow-prod.fluidtopics.net/Atygq1SwMf6Ac0ykFaGq6Q "You can use system properties to control the selection of IP address for specified configuration item (CI) classes."). {#r_LoadBalancerFields__table_kzz_hxg_ct__entry__2} | Field label and name | Probes that gather data | |-|-| | Serial Number \[serial_number\] | SNMP - Netscaler - Identity - Serial | | Asset tag \[asset_tag\] | SNMP - Netscaler - Identity | | Model ID \[model_id\] | SNMP - Netscaler - Identity | [Table 1. Fields on the Citrix Netscalers \[cmdb_ci_lb_netscaler\] table] {#r_LoadBalancerFields__table_kzz_hxg_ct} {#r_LoadBalancerFields__table_etd_fv2_ct__entry__2} | Field label and name | Probes that gather data | |-|-| | Serial Number \[serial_number\] | Cisco GSS - Serial Number | | Model ID \[model_id\] | Cisco GSS - Identity | | IP Address \[ip_address\] | Cisco GSS - Network | | Manufacturer \[manufacturer\] | Cisco GSS - Identity | [Table 2. Fields on the Cisco GSS \[cmdb_ci_lb_cisco_gss\] table] {#r_LoadBalancerFields__table_etd_fv2_ct} {#r_LoadBalancerFields__table_lqzb_5w1_cx__entry__2} | Field label and name | Probes that gather data | |-|-| | Serial Number \[serial_number\] | SNMP - Load Balancer -- Identity | | Model ID \[model_id\] | SNMP - Load Balancer -- Identity | | IP Address \[ip_address\] | SNMP - Load Balancer -- Identity | | Manufacturer \[manufacturer\] | SNMP - Load Balancer -- Identity | [Table 3. Fields on the Cisco CSS \[cmdb_ci_lb_cisco_css\] table] {#r_LoadBalancerFields__table_lqzb_5w1_cx} {#r_LoadBalancerFields__table_xg2_lt1_cx__entry__2} | Field label and name | Probes that gather data | |-|-| | Active modules \[active_modules\]\* | SNMP - F5 BIG-IP - System | | Asset tag \[asset_tag\] | SNMP - F5 BIG-IP - System | | Model ID \[model_id\] | SNMP - F5 BIG-IP - System | | Failover mode \[failover_mode\]\* | SNMP - F5 BIG-IP - System | | Failover peer \[failover_peer\]\* | SNMP - F5 BIG-IP - System | | Serial Number \[serial_number\] | Cisco GSS - Serial Number | [Table 4. Fields on the F5 BIG-IP \[cmdb_ci_lb_bigip\] table] {#r_LoadBalancerFields__table_xg2_lt1_cx}\*not visible on the form by default. Customize the form to add this field.{#r_LoadBalancerFields__table_ylt_w52_ct__entry__2} | Field label and name | Probes that gather data | |-|-| | Operational status \[operational_status\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System * SNMP - Load Balancer - Identity {#r_LoadBalancerFields__ul_kws_gwg_ct} | | Name \[name\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System * SNMP - Load Balancer - Identity {#r_LoadBalancerFields__ul_kws_gwg_ct} | [Table 5. Fields on the Load Balancer \[cmdb_ci_lb\] table] {#r_LoadBalancerFields__table_ylt_w52_ct} {#r_LoadBalancerFields__table_bj4_p52_ct__entry__2} | Field label and name | Probes that gather data | |-|-| | Configuration file \[config_file\]\* | Nginx - Get Configuration | | Name \[name\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * Nginx - Get Configuration {#r_LoadBalancerFields__ul_plm_r52_ct} | | IP Address \[ip_address\]\* | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * Nginx - Get Configuration {#r_LoadBalancerFields__ul_plm_r52_ct} | | Most recent discovery \[last_discovered\]\* | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * Nginx - Get Configuration {#r_LoadBalancerFields__ul_plm_r52_ct} | | Version \[version\] | * Apache - Version * HAProxy - Version * Nginx - Version {#r_LoadBalancerFields__ul_k5j_ylf_ct} | [Table 6. Fields on the Load Balancer Application \[cmdb_ci_lb_appl\] table] {#r_LoadBalancerFields__table_bj4_p52_ct} {#r_LoadBalancerFields__table_ang_kv2_ct__entry__2} | Field label and name | Probes that gather data | |-|-| | Status \[install_status\]\* | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_f3y_4wg_ct} | | Load Balancer \[load_balancer\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_f3y_4wg_ct} | | Name \[name\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_f3y_4wg_ct} | [Table 7. Fields on the Load Balancer Interface \[cmdb_ci_lb_interface\] table] {#r_LoadBalancerFields__table_ang_kv2_ct}\*not visible on the form by default. Customize the form to add this field.{#r_LoadBalancerFields__table_ccn_rv2_ct__entry__2} | Field label and name | Probes that gather data | |-|-| | Load Balancing Method \[load_balance_method\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_v4k_wv2_ct} | | Load Balancer \[load_balancer\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_v4k_wv2_ct} | | Most recent discovery \[last_discovered\]\* | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_v4k_wv2_ct} | | Name \[name\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_v4k_wv2_ct} | [Table 8. Fields on the Load Balancer Pool \[cmdb_ci_lb_pool\] table] {#r_LoadBalancerFields__table_ccn_rv2_ct}\*not visible on the form by default. Customize the form to add this field.{#r_LoadBalancerFields__table_xgv_cw2_ct__entry__2} | Field label and name | Probes that gather data | |-|-| | Fully qualified domain name \[fqdn\]\* | * HAProxy - Get Configuration * Nginx - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_tpv_vrf_ct} | | IP Address \[ip_address\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * Nginx- Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_s4x_4ff_ct} | | Load balancer \[load_balancer\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * Nginx- Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_s4x_4ff_ct} | | Most recent discovery \[last_discovery\]\* | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * Nginx- Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_s4x_4ff_ct} | | Name \[name\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * Nginx- Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_s4x_4ff_ct} | | Pool \[pool\]\* | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * Nginx- Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_s4x_4ff_ct} | | Service Port \[service_port\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * Nginx- Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_s4x_4ff_ct} | [Table 9. Fields for Load Balancer Pool Member \[cmdb_ci_lb_pool_member\] data] {#r_LoadBalancerFields__table_xgv_cw2_ct}\*not visible on the form by default. Customize the form to add this field.{#r_LoadBalancerFields__table_t44_3w2_ct__entry__2} | Field label and name | Probes that gather data | |-|-| | Input URL \[input_url\] | * Apache - Get JK Module * Apache - Get Proxy Module * Nginx - Get Configuration {#r_LoadBalancerFields__ul_dz2_c4f_ct} | | IP Address \[ip_address\] | * Apache - Get JK Module * Apache - Get Proxy Module * Cisco GSS - Identity * HAProxy - Get Configuration * Nginx - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_gnn_33f_ct} | | Last port \[last_port\]\* | HAProxy - Get Configuration | | Load Balancer \[load_balancer\] | * Apache - Get JK Module * Apache - Get Proxy Module * Cisco GSS - Identity * HAProxy - Get Configuration * Nginx - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_gnn_33f_cu} | | Most recent discovery \[last_discovery\]\* | * Apache - Get JK Module * Apache - Get Proxy Module * Cisco GSS - Identity * HAProxy - Get Configuration * Nginx - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_gnn_33f_cu} | | Service Port \[service_port\]\* | * Apache - Get JK Module * Apache - Get Proxy Module * Cisco GSS - Identity * HAProxy - Get Configuration * Nginx - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_gnn_33f_cu} | [Table 10. Fields for Load Balancer Service \[cmdb_ci_lb_service\] data] {#r_LoadBalancerFields__table_t44_3w2_ct}\*not visible on the form by default. Customize the form to add this field.{#r_LoadBalancerFields__table_e3z_nw2_ct__entry__2} | Field label and name | Probes that gather data | |-|-| | Load Balancer \[load_balancer\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * Nginx - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_t5l_wsx_tv} | | Name \[name\] | * Apache - Get JK Module * Apache - Get Proxy Module * HAProxy - Get Configuration * Nginx - Get Configuration * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_t5l_wsx_tv} | | Tag \[tag\] | * SNMP - F5 BIG-IP - System * SNMP - Netscaler - System {#r_LoadBalancerFields__ul_mjx_2yx_tv} | [Table 11. Fields for Load Balancer VLAN \[cmdb_ci_lb_vlan\] data] {#r_LoadBalancerFields__table_e3z_nw2_ct} ## Apache web server data Discovery also collects data on Apache web serer load balancing modules using SSH. See [Apache mod_jk and mod_proxy discovery](https://servicenow-prod.fluidtopics.net/bcL7y6RxUEpQ2DiAMcE5OQ#c_LoadBalancerApacheWebServers "Discovery uses SSH to find Apache connectors mod_jk and mod_proxy.") for more information on probes for Apache web server data. For information on the tables, fields, and data sources that discovery populates for Apache web servers, see [Apache web server discovery](https://servicenow-prod.fluidtopics.net/bcL7y6RxUEpQ2DiAMcE5OQ#r_DataCollDiscoApacheWebServers "Discovery identifies and classifies information about Apache web servers on both Windows and Linux computers.").