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[IS-IS] Add Advanced IS-IS Support in Terraform Module #104

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[IS-IS] Add Advanced IS-IS Support in Terraform Module #104

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[IS-IS] Add Advanced IS-IS Support in Terraform Module
Dan-Dev-Net Nov 21, 2025
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Apply pre-commit formatting fixes
Dan-Dev-Net Nov 21, 2025
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2 changes: 2 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -127,6 +127,7 @@ module "iosxe" {
| [iosxe_flow_monitor.flow_monitor](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/flow_monitor) | resource |
| [iosxe_flow_record.flow_record](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/flow_record) | resource |
| [iosxe_interface_ethernet.ethernet](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/interface_ethernet) | resource |
| [iosxe_interface_isis.loopback_isis](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/interface_isis) | resource |
| [iosxe_interface_loopback.loopback](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/interface_loopback) | resource |
| [iosxe_interface_mpls.ethernet_mpls](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/interface_mpls) | resource |
| [iosxe_interface_mpls.loopback_mpls](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/interface_mpls) | resource |
Expand Down Expand Up @@ -154,6 +155,7 @@ module "iosxe" {
| [iosxe_interface_switchport.ethernet_switchport](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/interface_switchport) | resource |
| [iosxe_interface_switchport.port_channel_switchport](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/interface_switchport) | resource |
| [iosxe_interface_vlan.vlan](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/interface_vlan) | resource |
| [iosxe_isis.isis](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/isis) | resource |
| [iosxe_license.license](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/license) | resource |
| [iosxe_line.line](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/line) | resource |
| [iosxe_lldp.lldp](https://registry.terraform.io/providers/CiscoDevNet/iosxe/0.10.2/docs/resources/lldp) | resource |
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19 changes: 19 additions & 0 deletions iosxe_interfaces.tf
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Expand Up @@ -517,6 +517,11 @@ locals {
pim_border = try(int.pim.border, local.defaults.iosxe.devices.configuration.interfaces.loopbacks.pim.border, null)
pim_bsr_border = try(int.pim.bsr_border, local.defaults.iosxe.devices.configuration.interfaces.loopbacks.pim.bsr_border, null)
pim_dr_priority = try(int.pim.dr_priority, local.defaults.iosxe.devices.configuration.interfaces.loopbacks.pim.dr_priority, null)
isis = try(int.isis, null) != null ? true : false
isis_ipv4_metric_levels = try(length(int.isis.ipv4_metric_levels) == 0, true) ? null : [for level in int.isis.ipv4_metric_levels : {
level = try(level.level, local.defaults.iosxe.devices.configuration.interfaces.loopbacks.isis.ipv4_metric_levels.level, null)
value = try(level.value, local.defaults.iosxe.devices.configuration.interfaces.loopbacks.isis.ipv4_metric_levels.value, null)
}]
}
]
])
Expand Down Expand Up @@ -635,6 +640,20 @@ resource "iosxe_interface_pim" "loopback_pim" {
]
}

resource "iosxe_interface_isis" "loopback_isis" {
for_each = { for v in local.interfaces_loopbacks : v.key => v if v.isis }

device = each.value.device
type = "Loopback"
name = each.value.id
ipv4_metric_levels = each.value.isis_ipv4_metric_levels

depends_on = [
iosxe_interface_loopback.loopback,
iosxe_isis.isis
]
}

####### VLANS #######

locals {
Expand Down
33 changes: 33 additions & 0 deletions iosxe_isis.tf
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Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
locals {
isis_processes = flatten([
for device in local.devices : [
for process in try(local.device_config[device.name].routing.isis_processes, []) : {
key = format("%s/%s", device.name, process.area_tag)
device = device.name
area_tag = try(process.area_tag, null)
nets = try(process.nets, null)
metric_style_wide = try(process.metric_style_wide, local.defaults.iosxe.configuration.routing.isis_processes.metric_style_wide, null)
metric_style_narrow = try(process.metric_style_narrow, local.defaults.iosxe.configuration.routing.isis_processes.metric_style_narrow, null)
metric_style_transition = try(process.metric_style_transition, local.defaults.iosxe.configuration.routing.isis_processes.metric_style_transition, null)
log_adjacency_changes = try(process.log_adjacency_changes, local.defaults.iosxe.configuration.routing.isis_processes.log_adjacency_changes, null)
log_adjacency_changes_all = try(process.log_adjacency_changes_all, local.defaults.iosxe.configuration.routing.isis_processes.log_adjacency_changes_all, null)
}
]
])
}

resource "iosxe_isis" "isis" {
for_each = { for e in local.isis_processes : e.key => e }
device = each.value.device

area_tag = each.value.area_tag
nets = try(length(each.value.nets) == 0, true) ? null : [for net in each.value.nets : {
tag = try(net.tag, null)
}]
metric_style_wide = each.value.metric_style_wide
metric_style_narrow = each.value.metric_style_narrow
metric_style_transition = each.value.metric_style_transition
log_adjacency_changes = each.value.log_adjacency_changes
log_adjacency_changes_all = each.value.log_adjacency_changes_all
}

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