Terminology for IP Routing

ARP Vlink direct routes

IP packets are forwarded through a specified physical interface. IP packets cannot be forwarded through a VLANIF interface, because a VLANIF interface is a logical interface with several physical interfaces as its member interfaces. If an IPv4 packet reaches a VLANIF interface, the device obtains information about the physical interface using ARP and generates the relevant routing entry. The route recorded in the routing entry is called an ARP Vlink direct route.

FRR

FRR is applicable to services that are very sensitive to packet loss and delay. When a fault is detected at the lower layer, the lower layer informs the upper layer routing system of the fault. Then, the routing system forwards packets through a backup link. In this manner, the impact of the link fault on services is minimized.

NDP Vlink direct routes

IP packets are forwarded through a specified physical interface. IP packets cannot be forwarded through a VLANIF interface, because a VLANIF interface is a logical interface with several physical interfaces as its member interfaces. If an IPv6 packet reaches a VLANIF interface, the device obtains information about the physical interface using the neighbor discovery protocol (NDP) and generates the relevant routing entry. The route recorded in the routing entry is called an NDP Vlink direct route.

UNR

When a user goes online through a Layer 2 device, such as a switch, but there is no available Layer 3 interface and the user is assigned an IP address, no dynamic routing protocol can be used. To enable devices to use IP routes to forward the traffic of this user, use the Huawei User Network Route (UNR) technology to assign a route to forward the traffic of the user.

ARP

Address Resolution Protocol

BGP

Border Gateway Protocol

CE

Customer Edge

FIB

Forwarding Information Base

IBGP

Internal Border Gateway Protocol

IGP

Internal Gateway Protocol

IS-IS

Intermediate System-Intermediate System

NDP

Neighbor Discover Protocol

OSPF

Open Shortest Path First

PE

Provider Edge

RIP

Routing Information Protocol

RM

Route Management

Vlink

Virtual Link

VoIP

Voice Over IP

VPN

Virtual Private Network

VRP

Versatile Routing Platform