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pt_estimate_plan is a lightweight dry-run tool that computes the expected size of a topology — number of devices by category, number of links by type, number of routing and DHCP configuration blocks — without running the full planning pipeline. No TopologyPlan is generated, no IP addresses are assigned, and no validation is performed. This makes it ideal for quickly gauging the scale and complexity of a proposed network before committing to a full pt_plan_topology or pt_full_build call.

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Parameters

pt_estimate_plan accepts 9 topology-shape parameters. Unlike pt_plan_topology, it does not accept model or template parameters (router_model, switch_model, template, floating_routes, ospf_process_id, eigrp_as) — the estimator computes counts arithmetically and does not build the full model, so those parameters are not relevant here.
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routers
integer
default:"2"
Number of routers. Accepts 1 to 20.
​
pcs_per_lan
integer
default:"3"
Number of PCs per LAN (applied uniformly across all LANs).
​
laptops_per_lan
integer
default:"0"
Number of laptops per LAN.
​
switches_per_router
integer
default:"1"
Number of access switches per router (0 to 4).
​
servers
integer
default:"0"
Number of server hosts.
​
access_points
integer
default:"0"
Number of access points — capped at one per router.
​
has_wan
boolean
default:"false"
Whether a WAN cloud node is included.
​
dhcp
boolean
default:"true"
Whether DHCP pools will be generated.
​
routing
string
default:"static"
Routing protocol (static, ospf, eigrp, rip, none). Used to estimate the number of routing config blocks.

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Returns

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devices
object
Device counts broken down by category:
  • routers — number of routers
  • switches — total switches (routers × switches_per_router)
  • pcs — total PCs
  • laptops — total laptops
  • access_points — total APs (capped at routers)
  • servers — total servers
  • clouds — 1 if has_wan is true, otherwise 0
  • total — sum of all above
​
links
object
Link counts broken down by connection type:
  • router_to_router — chain links between routers (routers - 1)
  • router_to_switch — one per switch
  • switch_to_pc — one per PC
  • switch_to_laptop — one per laptop
  • switch_to_access_point — one per AP
  • switch_to_server — one per server
  • router_to_cloud — 1 if has_wan, otherwise 0
  • total — sum of all above
​
configs
object
Estimated configuration block counts:
  • routers_to_configure — number of routers that will receive IOS config
  • dhcp_pools — number of DHCP pools (equals routers when dhcp is true)
  • static_routes — estimated count of ip route statements (router_links × 2)
  • ospf_configs / rip_configs / eigrp_configs — non-zero only for the selected routing protocol
  • floating_routes — "yes (backup via alternate paths)" or "no"
​
subnets
object
  • lan_subnets — number of /24 LAN subnets (equals routers)
  • link_subnets — number of /30 point-to-point subnets (equals router_links + wan_link)
​
complexity
string
A qualitative complexity rating: "simple", "moderada", "compleja", or "muy compleja". Computed from a weighted score of routers, hosts, routing protocol, WAN, and floating routes.

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Example

Request — estimate a 3-router OSPF topology with 2 PCs per LAN and a WAN cloud: 
{
  "routers": 3,
  "pcs_per_lan": 2,
  "switches_per_router": 1,
  "has_wan": true,
  "dhcp": true,
  "routing": "ospf"
}
Estimated output: 
{
  "devices": {
    "routers": 3,
    "switches": 3,
    "pcs": 6,
    "laptops": 0,
    "access_points": 0,
    "servers": 0,
    "clouds": 1,
    "total": 13
  },
  "links": {
    "router_to_router": 2,
    "router_to_switch": 3,
    "switch_to_pc": 6,
    "switch_to_laptop": 0,
    "switch_to_access_point": 0,
    "switch_to_server": 0,
    "router_to_cloud": 1,
    "total": 12
  },
  "configs": {
    "routers_to_configure": 3,
    "dhcp_pools": 3,
    "static_routes": 0,
    "ospf_configs": 3,
    "rip_configs": 0,
    "eigrp_configs": 0,
    "floating_routes": "no"
  },
  "subnets": {
    "lan_subnets": 3,
    "link_subnets": 3
  },
  "complexity": "moderada"
}
This tells you the full build will place 13 devices, create 12 links, and configure OSPF on 3 routers — before spending any time on planning or generating scripts. Use this information to sanity-check your parameters or compare the scale of different topology options.

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