Switches and Servers

All devices in the Hedgehog Fabric are divided into two groups: switches and servers, represented by the corresponding Switch and Server objects in the API. These objects are needed to define all participants of the Fabric and their roles in the Wiring Diagram as well as Connections between them.

Switches

Switches are the main building blocks of the Fabric. They are represented by Switch objects in the API. These objects consist of basic metadata like name, description, location, role, as well as port group speeds, port breakouts, ASN, IP addresses, and more. Additionally, it contains a reference to the SwitchProfile object that defines the switch model and capabilities, more details can be found in the Switch Profiles and Port Naming section.

apiVersion: wiring.githedgehog.com/v1alpha2
kind: Switch
metadata:
  name: s5248-01
  namespace: default
spec:
  profile: dell-s5248f-on # Mandatory reference to the SwitchProfile object defining the switch model and capabilities
  asn: 65101 # ASN of the switch
  description: leaf-1
  ip: 172.30.10.100/32 # Switch IP that will be accessible from the Control Node
  location:
    location: gen--default--s5248-01
  locationSig:
    sig: <undefined>
    uuidSig: <undefined>
  portBreakouts: # Configures port breakouts for the switch, see the SwitchProfile for available options
    E1/55: 4x25G
  portGroupSpeeds: # Configures port group speeds for the switch, see the SwitchProfile for available options
    "1": 10G
    "2": 10G
  portSpeeds: # Configures port speeds for the switch, see the SwitchProfile for available options
    E1/1: 25G
  protocolIP: 172.30.11.100/32 # Used as BGP router ID
  role: server-leaf # Role of the switch, one of server-leaf, border-leaf and mixed-leaf
  vlanNamespaces: # Defines which VLANs could be used to attach servers
  - default
  vtepIP: 172.30.12.100/32
  groups: # Defines which groups the switch belongs to
  - some-group
  redundancy: # Optional field to define that switch belongs to the redundancy group
    group: eslag-1 # Name of the redundancy group
    type: eslag # Type of the redundancy group, one of mclag or eslag

The SwitchGroup is just a marker at that point and doesn't have any configuration options.

apiVersion: wiring.githedgehog.com/v1alpha2
kind: SwitchGroup
metadata:
  name: border
  namespace: default
spec: {}

Redundancy Groups

Redundancy groups are used to define the redundancy between switches. It's a regular SwitchGroup used by multiple switches and currently it could be MCLAG or ESLAG (EVPN MH / ESI). A switch can only belong to a single redundancy group.

MCLAG is only supported for pair of switches and ESLAG is supported for up to 4 switches. Multiple types of redundancy groups can be used in the fabric simultaneously.

Connections with types mclag and eslag are used to define the servers connections to switches. They are only supported if the switch belongs to a redundancy group with the corresponding type.

In order to define a MCLAG or ESLAG redundancy group, you need to create a SwitchGroup object and assign it to the switches using the redundancy field.

Example of switch configured for ESLAG:

apiVersion: wiring.githedgehog.com/v1alpha2
kind: SwitchGroup
metadata:
  name: eslag-1
  namespace: default
spec: {}
---
apiVersion: wiring.githedgehog.com/v1alpha2
kind: Switch
metadata:
  name: s5248-03
  namespace: default
spec:
  ...
  redundancy:
    group: eslag-1
    type: eslag
  ...

And example of switch configured for MCLAG:

apiVersion: wiring.githedgehog.com/v1alpha2
kind: SwitchGroup
metadata:
  name: mclag-1
  namespace: default
spec: {}
---
apiVersion: wiring.githedgehog.com/v1alpha2
kind: Switch
metadata:
  name: s5248-01
  namespace: default
spec:
  ...
  redundancy:
    group: mclag-1
    type: mclag
  ...

In case of MCLAG it's required to have a special connection with type mclag-domain that defines the peer and session links between switches. For more details, see Connections.

Servers

Servers include both control nodes and user's workload servers.

Control Node:

apiVersion: wiring.githedgehog.com/v1alpha2
kind: Server
metadata:
  name: control-1
  namespace: default
spec:
  type: control # Type of the server, one of control or "" (empty) for regular workload server

Regular workload server:

apiVersion: wiring.githedgehog.com/v1alpha2
kind: Server
metadata:
  name: server-1
  namespace: default
spec:
  description: MH s5248-01/E1 s5248-02/E1

---

Last update: June 5, 2024
Created: December 22, 2023