Data Center decomposition Experiment (VI)--FHRP

In the previous experiment, five. the combination of VPC and Fabricpath, called vpc+, can be regarded as fabricpath to two-layer network fusion and enhancement, then fabricpath how to combine with three layer network?

The answer is: FHRP ( firsthop Routing Protocol), The First routing protocol is a generic term for several protocols, including HSRP VRRP GLBP,VRRP and HSRP are relatively common in comparison.

In General, they work in a similar way, that is, several routers to act as a gateway to the two-tier network, before doing today's experiment, we still review the traditional network, how STP + FHRP works.

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As shown in a classic network structure, in such a network, there are a few problems in the design needs to be considered,

1. which device is root of STP?

usually we recommend that the core layer of equipment is the root of the STP, the figure is dc2-n7k-3

2. which device is a three-tier gateway (GW) to end a two-tier VLAN?

Layer Two network structure, of course, the core layer of equipment is a three-tier gateway, this is also dc2-n7k-3, ask, if Dc2-n7k-4 is a three-tier gateway will there be a problem?

3. What is the relationship between the root of STP and the three-tier gateway?

It doesn't matter, it can be a device, or it can be two devices.

if the two devices serve as STP Root and three-tier gateways, the following situation occurs, ServerA sent to the gateway DC2-N7K-4 data will be dc2-n7k-3 bypass, the path is not optimized.

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if the two devices serve as STP Root and three-tier gateways, the following situation occurs, all data is handled by dc2-n7k-3, may be very stressful, and dc2-n7k-4 in a very idle state, the resources are wasted.

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The usual way to solve this problem is to VLANs are divided into two groups, one set of VLANs to dc2-n7k-3 both STP root & GW, and the other to dc2-n7k-4 as STP root & GW, which makes it possible to use the resources of the network more fully. The disadvantage is that the design and configuration are relatively complex.

Experimental topology:

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The FHRP in Fabricpath environment is basically similar to the configuration of FHRP in traditional networks.

in HSRP For example:

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VRRP GLBP of the relevant configuration for the time being not demonstrated, interested can add qq:18916490709 or: 18916490709

, do the experiment together 650) this.width=650; "src=" Http://img.baidu.com/hi/jx2/j_0005.gif "alt=" J_0005.gif "/>

Data Center decomposition Experiment (VI)--FHRP