Relationships between some switches and routers are not being created in CMDB (no Layer 2 / dependency connections visible).Summary<!-- /*NS Branding Styles*/ --> .ns-kb-css-body-editor-container { p { font-size: 12pt; font-family: Lato; color: var(--now-color--text-primary, #000000); } span { font-size: 12pt; font-family: Lato; color: var(--now-color--text-primary, #000000); } h2 { font-size: 24pt; font-family: Lato; color: var(--now-color--text-primary, black); } h3 { font-size: 18pt; font-family: Lato; color: var(--now-color--text-primary, black); } h4 { font-size: 14pt; font-family: Lato; color: var(--now-color--text-primary, black); } a { font-size: 12pt; font-family: Lato; color: var(--now-color--link-primary, #00718F); } a:hover { font-size: 12pt; color: var(--now-color--link-primary, #024F69); } a:target { font-size: 12pt; color: var(--now-color--link-primary, #032D42); } a:visited { font-size: 12pt; color: var(--now-color--link-primary, #00718f); } ul { font-size: 12pt; font-family: Lato; } li { font-size: 12pt; font-family: Lato; } img { display: ; max-width: ; width: ; height: ; } } Issue Relationships between some switches and routers are not being created in CMDB (no Layer 2 / dependency connections visible). Root Cause The affected routers are BGP-enabled. By default, ServiceNow Discovery does not create neighbor or routing relationships for BGP routers to avoid performance and memory issues caused by large BGP routing tables. This is expected Out-of-the-Box behavior, controlled by the system property: Property: glide.discovery.bgp_router_disable Default: true When enabled, Discovery does not populate the required routing/neighbor tables, so relationships are not created. Explanation When this property is true: Discovery flags the device as a BGP router during SNMP classification The following tables are NOT populated: dscy_route_interface Because this tables are empty: Layer 2 relationships will not not created Switch ↔ Router physical relationships do not appear in CMDB or Dependency View This is expected Out-of-the-Box behavior, not a defect. Verification This can be verified through the following step in Network Switch Pattern Step 1.52 – Get BGP version, ASN, and identifier --> If you see that BGP- Enabled is True please ask the customer to make it false CAUTION: Enabling this may cause: MID Server performance issues High memory usage Discovery failures or OOM errors This should only be considered in small, controlled environments after performance validation and not for large nertworks Release<!-- /*NS Branding Styles*/ --> .ns-kb-css-body-editor-container { p { font-size: 12pt; font-family: Lato; color: var(--now-color--text-primary, #000000); } span { font-size: 12pt; font-family: Lato; color: var(--now-color--text-primary, #000000); } h2 { font-size: 24pt; font-family: Lato; color: var(--now-color--text-primary, black); } h3 { font-size: 18pt; font-family: Lato; color: var(--now-color--text-primary, black); } h4 { font-size: 14pt; font-family: Lato; color: var(--now-color--text-primary, black); } a { font-size: 12pt; font-family: Lato; color: var(--now-color--link-primary, #00718F); } a:hover { font-size: 12pt; color: var(--now-color--link-primary, #024F69); } a:target { font-size: 12pt; color: var(--now-color--link-primary, #032D42); } a:visited { font-size: 12pt; color: var(--now-color--link-primary, #00718f); } ul { font-size: 12pt; font-family: Lato; } li { font-size: 12pt; font-family: Lato; } img { display: ; max-width: ; width: ; height: ; } } All Versions Currently seen in zurich