What are routing instances?

What are routing instances?

A routing instance is a collection of routing tables, interfaces, and routing protocol parameters. The set of interfaces belongs to the routing tables, and the routing protocol parameters control the information in the routing tables.

What is a VRF instance?

Virtual routing and forwarding (VRF) is an IP-based computer network technology that enables the simultaneous co-existence of multiple virtual routers (VRs) as instances or virtual router instances (VRIs) within the same router. Packets are forwarded only between interfaces on the same VRF.

What is management VRF?

Management VRF is a subset of VRF (virtual routing tables and forwarding) and provides a separation between the out-of-band management network and the in-band data plane network. With management VRF, a second table, mgmt, is used for routing through the Ethernet ports of the switch.

What is the fxp0 interface in Juniper?

The fxp0 interface is typically an RJ-45 port on the Routing Engine. The me0 interface is typically an RJ-45 port on the Routing Engine. The vme interface is used when the device is part of a Virtual Chassis (VC), and is accessed via the me0 port.

What is the difference between VPN and VRF?

As the Cisco docs point out: “Each VPN is associated with one or more VPN routing or forwarding instances (VRFs). A VRF consists of an IP routing table, a derived Cisco express forwarding (CEF) table, and a set of interfaces that use this forwarding table.” “An MPLS VPN assigns a unique VRF instance to each VPN.

What is a VPN instance?

A VPN instance is a collection of the VPN membership and routing rules of its associated site. A VPN instance might correspond to more than one VPN.

Why VRF is required?

VRF provides a way for you to configure multiple routing instances on your router. This is beneficial if you have a need to keep customer traffic and routing separate and you want to utilize the same hardware. With a VRF you can use the same IP address assigned to two different interfaces on a router at the same time.

What is RD and RT in Mpls?

The Route-Distinguisher (RD) & Route-Target (RT) are two different concepts that are both used in an MPLS VPN. The RD is used to keep all prefixes in the BGP table unique, and the RT is used to transfer routes between VRF’s/VPNS. A route target is kind of like a little tag that is attached to a route.

What is management IP in router?

The management IP address in the context of a switch is the address that the switch itself can be reached at via telnet or SSH (or via monitoring requests such as SNMP traffic).

What is VRF in Cisco switch?

VRF (Virtual Routing and Forwarding) is a technology that allows having more than one routing table on a single router. The concept of VRFs on routers is similar to VLANs on switches. VRFs are typically used in combination with MPLS VPNs. VRFs without MPLS is called VRF lite.

How do I enable Juniper interface?

Enable/Disable Interface in Juniper

1. root@Juniper# set interfaces ge-0/0/1.0 disable << This is cisco equivalent of “shutdown” – To Juniper enable interface:
2. root@Juniper# delete interfaces ge-0/0/1.0 disable << This is cisco equivalent of “no shutdown” Verification:
3. root@Juniper#show ge-0/0/1.0.

How do I set management interface on Juniper switch?

To configure a management port by CLI commands.

1. Use the command “family inet address” to configure a management IP address on the interface.
2. Configure a static route with the next hop to the management network default gateway set routing-options static route 0.0.0.0/0 next-hop 10.93.15.1/21.

How are routing instances used on a Juniper router?

On a Juniper switch or router, we can create additional virtual routing tables, called routing-instances. These are similar to a VRF on a Cisco Router. Each routing instance groups routing tables (remember different tables are used for different families), interfaces, and protocol configuration into a single place.

Is it possible to exchange directly connected routes across routing instances?

This article provides a workaround for a limitation on EX switch platforms when attempting to exchange (leaking) directly connected routes across routing instances. Virtual routing instances allow administrators to divide a Juniper Networks EX Series Ethernet Switch into multiple independent virtual routers, each with its own routing table.

Can a routing table have more than one instance?

It’s very handy if you want to have more than one instance of a routing protocol (only one instance of a routing protocol is allowed per routing table), but don’t want to fully separate your traffic. The virtual-router instance type is also very close to Cisco’s VRF-Lite, and is very similar to the no-forwarding instance type.

Is the management interface always present in the default routing table?

Because there are FreeBSD and Junos OS applications that assume that the management interface is always present in the default inet.0 routing table, the mgmt_junos routing instance is not instantiated by default.