Oam (Operation Administration & Maintenance); Vrrp (Virtual Router Redundancy Protocol) - Huawei NetEngine80E Configuration Manual - Reliability

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
1.3.2 OAM (Operation Administration & Maintenance)
The OAM technology can simplify the network operation and test the network performance at
any time, which helps you to cut the network operation cost. This section describes only the
MPLS OAM technology.
MPLS is a key bearer technology applied to the extendable next generation network (NGN),
supporting multiple services guaranted by QoS. A unique network layer is introduced to MPLS
and this layer may lead to faults. Therefore, MPLS must be competent with OAM.
MPLS supports different Layer 2 and Layer 3 protocols, such as IP, FR, ATM, and Ethernet.
MPLS offers an OAM mechanism entirely independent from upper and lower layers, enabling
the following features on the MPLS user plane:
l
l
With the MPLS OAM mechanism, the router can detect, identify, and locate a fault of MPLS
layer effectively. Then, the fault is reported and processed. In addition, when a failure occurs,
the protection switching mechanism can be triggered.

1.3.3 VRRP (Virtual Router Redundancy Protocol)

VRRP groups multiple routers into one virtual router, and sets the address of the default gateway
as the IPv6 address of the virtual router.
Generally, all hosts of a LAN are configured with the same default route to the gateway, for
example, Router A in
networks. When the gateway fails, the communication between hosts and external networks is
interrupted.
Figure 1-1 LAN default gateway
IP Address:10.0.0.2/24
IP Address:10.0.0.3/24
IP Address:10.0.0.4/24
The common method to improve the system reliability is to deploy multiple egress gateways.
In addition, the problem of selecting routes among these gateways should be solved. The Virtual
Router Redundancy Protocol (VRRP) is a fault-tolerant protocol defined in RFC 3768. VRRP
solves the problem of route selection among egress gateways by separating the physical devices
from logical devices.
Issue 02 (2011-09-10)
Detecting the TE LSP connectivity
Performing switchover when a link fails to provide services according to Service Level
Agreements (SLAs)
Figure
Gateway:10.0.0.1
Gateway:10.0.0.1
Gateway:10.0.0.1
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1-1. In this manner, the hosts can communicate with external
Ethernet
RouterA
10.0.0.1/24
1 Reliability Overview
Network
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