83. VRRP of redundant Gateway configuration experiment

1. Experimental topology

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Virtual Route Redundancy Protocol

Virtual one gateway between two routers, one is the master router and the other is the backup router, and when the active router is down, the standby router 10s receives no hello information, replacing the active router.

The difference between VRRP and HSRP

The primary and standby routers are called different, and HSRP is referred to as active and standby, while VRRP is called Master and backup.

Depending on the fingering of the virtual gateway IP, the HSRP virtual gateway IP can only be virtual, while the VRRP virtual gateway IP may be either a virtual IP or an interface's real IP.

Unlike routers that send hello messages, all routers in HSRP send a hello message, and only the master router sends a hello message in VRRP.

HSRP turns preemption off by default, VRRP default on preemption

HSRP has port tracking TRACK,VRRP no port tracking track

2. Basic Configuration

R1 Configuration

Interface serial0/0

IP address 12.1.1.1 255.255.255.0

Interface SERIAL0/1

IP address 13.1.1.1 255.255.255.0

Interface SERIAL0/2

IP address 15.1.1.1 255.255.255.0

router OSPF 110

Router-id 1.1.1.1

Log-adjacency-changes

Network 12.1.1.0 0.0.0.255 Area 0

Network 13.1.1.0 0.0.0.255 Area 0

Network 15.1.1.0 0.0.0.255 Area 0

R2 Configuration

Interface serial0/0

IP address 12.1.1.2 255.255.255.0

Interface fastethernet1/0

IP address 100.1.1.2 255.255.255.0

router OSPF 110

Router-id 2.2.2.2

Network 12.1.1.0 0.0.0.255 Area 0

Network 100.1.1.0 0.0.0.255 Area 0

R3 Configuration

Interface SERIAL0/1

IP address 13.1.1.3 255.255.255.0

Interface fastethernet1/0

IP address 100.1.1.3 255.255.255.0

router OSPF 110

Router-id 3.3.3.3

Network 13.1.1.0 0.0.0.255 Area 0

Network 100.1.1.0 0.0.0.255 Area 0

R4 Configuration

No IP routing

Interface fastethernet1/0

IP address 100.1.1.4 255.255.255.0

IP Default-gateway 100.1.1.254

R5 Configuration

Interface SERIAL0/2

IP address 15.1.1.5 255.255.255.0

router OSPF 110

Router-id 5.5.5.5

Network 15.1.1.0 0.0.0.255 Area 0

3, Configuration VRRP

R2 Configuration

Interface fastethernet1/0

VRRP 1 IP 100.1.1.254

VRRP 1 Priority 105

R3 Configuration

Interface fastethernet1/0

VRRP 1 IP 100.1.1.254

3. Test VRRP

Since the priority of the R2 is higher than R3, at this point the R2 bit master router, R3 bit backup router.

The virtual gateway IP corresponds to a MAC address format of

0000.5e 00.01 01

OUI VRRP VRRP Group

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Thereafter, whether the R2 f1/0 or s0/0 is closed, R3 will be converted to the master router, and when f1/0 or s0/0 is restored, R2 becomes the master router because of the preemption configuration.

In this case, only one router is forwarding the data, in order to better utilize the two routers, we can configure two sets of HSRP. A set of default gateways is R2, and the other default gateway is R3, which allows for load balancing effect.

This article is from the "Open Source Hall" blog, please be sure to keep this source http://kaiyuandiantang.blog.51cto.com/10699754/1729234

83. VRRP of redundant Gateway configuration experiment