What is bridge domains in Juniper?

In Junos OS Release 9.2 and later, bridge domains provide support for a Layer 2 trunk port. A Layer 2 trunk interface enables you to configure a single logical interface to represent multiple VLANs on a physical interface. A Layer 2 trunk interface also supports IRB within a bridge domain.

What is a bridge domain interface?

Bridge domain interface is a logical interface that allows bidirectional flow of traffic between a Layer 2 bridged network and a Layer 3 routed network traffic. Bridge domain interfaces are identified by the same index as the bridge domain.

What is the difference between bridge domain and VLAN?

Bridge groups provide a method to group two or more ports into a single broadcast domain, where as VLAN provide a method to group many ports into a single broadcast domain or establish a number of broadcast domains (or secure groups) on a single switch.

How do I create a domain bridge?

  1. Step 1 – Navigate to Bridge Domains in the Tenants Tab under Networking.
  2. Step 2 – Create WEB Bridge Domain (BD)
  3. Step 3 – Create WEB Subnet.
  4. Step 4 – Add WEB Subnet.
  5. Step 5 – Associate L3 Out.
  6. Step 6 – Create the second Bridge Domain.
  7. Step 7 – Create APP Bridge Domain.
  8. Step 8 – Create APP Subnet.

What is a Layer 2 bridge?

In networking, the device used to connect multiple networks together at layer 2 (L2) is called a bridge. Layer 2 refers to the data link layer of the OSI model, where data is encoded into units (frames), checked, and transmitted. The bridge has interfaces to several LAN segments which it connects (or bridges) together.

What is bridge virtual interface BVI )?

Description. The Bridge-Group Virtual Interface (BVI) becomes available on routers when the bridge irb command has been given. This interface allows the router to route and bridge the same protocol over the same interface. The bridge group-number must match the bridge group defined for the bridge.

What is VLAN bridge setup?

The VLAN & Bridge application allows you to configure groups of ports independent of their physical location as a virtual LAN. Switches are interconnected by the Inter-Switch Link (ISL) port so that VLAN traffic can cross multiple switches. A Layer-2 switch is basically a bridge.

How is BD different from VLAN?

The BD-VLAN connects different local FD-VLANs to a single bridge domain, and is used on the Broadcom ASIC to determine the Layer 2 broadcast domain. If for example two different access_enc VLANs have the same BDVlan ID it means they belong to two EPGs that are part of the same BD.

How do I put my Cisco router into Bridge mode?

Bridged mode

  1. Go to Administration.
  2. Click on Management.
  3. In the Working Mode section select Bridged Only.
  4. Click Save Settings.

How do I associate a routing interface with a bridge domain?

To associate a routing interface with a bridge domain, include the routing-interface routing-interface-name statement and specify a routing-interface-name you configured at the [edit interfaces irb] hierarchy level. You can configure only one routing interface for each bridge domain.

How many active logical interfaces are supported on a bridge domain?

A maximum of 4000 active logical interfaces are supported on a bridge domain or on each mesh group in a virtual private LAN service (VPLS) instance configured for Layer 2 bridging.

What is required for a bridge domain to support layer 2?

A bridge domain must include a set of logical interfaces that participate in Layer 2 learning and forwarding. You can optionally configure a VLAN identifier and a routing interface for the bridge domain to also support Layer 3 IP routing.

How do I use IRB on a bridge domain?

IRB enables you to route packets to another routed interface or to another bridge domain that has an IRB interface configured. You configure a logical routing interface by including the irb statement at the [edit interfaces] hierarchy level and include that interface in the bridge domain.