SAT06 Vlan Routing

7/27/2019 SAT06 Vlan Routing

http://slidepdf.com/reader/full/sat06-vlan-routing 1/20

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Training objectives

Understand the inter-VLAN routing solutions

Understand the creation background of inter-VLANrouting

Understand layer 3 switch schema and networkingadvantages

Grasp configuration of inter-VLAN routing



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ayer sw c ngnetwork-broadcast network

Layer 2switchingbroadcast

domain

In traditional layer 2 switching networks, the whole network is a broadcast domain,so when the network increases in scale, network broadcasting severely increases,causing a drop in efficiency, which is disadvantageous for management



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nsu a ng ayer roa casdomain

VLAN 100 VLAN 200

VLAN 300

VLAN has insulated the layer 2 broadcast domain, thus strictly insulating any flowbetween any two VLANs



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Inter-VLAN communication

VLAN 100 VLAN 200

VLAN 300

Flow between different VLANs cannot directly cross VLAN boundaries, we shoulduse routers so that messages can be transferred from one VLAN to another VLAN



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ou e se ec on ninter-VLAN communication

VLAN 100 VLAN 200

1.1.1.10/24 2.2.2.20/24

ping 2.2.2.20

Non-localcommunicationuses the default

gateway

Network1.1.1.0/24 ininterface1

Network2.2.2.0/24 in

interface2

A default gateway is configured at the host; for non-local communication, the hostwill automatically search for the default gateway, and send the messages to thedefault gateway for transfer instead of directly sending to the destination host



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ne p ys ca connec on or every VLAN

VLAN 100 VLAN 200

VLAN 300

VLAN is configured at layer 2 switches, and every VLAN uses a unique physicalconnection to one interface of the router.



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Use VLAN Trunking

VLAN 100 VLAN 200

VLAN 300

Layer 2 switches and routers are configured with ports for their interconnection thatuse VLAN Trunking, so that multiple VLANs can share the same physicalconnection to the router.



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Use VLAN Trunking

VLAN 100 VLAN 200

VLAN 300

Layer 2 switches and routers are configured with ports for their interconnection thatuse VLAN Trunking, so that multiple VLANs can share the same physicalconnection to the router.



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routing

Functional integration of layer 2 switches and routers forms the layer 3 switch; thelayer 3 switch functionally realizes VLAN classification, VLAN internal layer 2switching and inter-VLAN route functions

V L A N1 00

V L A N200

V L A N300

VLAN100

VLAN200

VLAN300



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unc on mo e o ayer switch

ETH0:10.110.0.254/24

ETH1:10.110.1.254/24

ETH2:10.110.2.254/24

10.110.0.113/24G: 10.110.0.254

10.110.1.69/24

G:10.110.1.254

10.110.1.88/24

G:10.110.1.25410.110.2.200/24

G:10.110.2.254

VLAN Switch



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ou es o ayer sw c esand layer 2 switching



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essage o message ayer switching technology

3

2

1

3

2

1

3

2

1

3

2

1

3

2

1

Traditional layer 3 technology processes each message, and transfers

messages based on the third layer addresses. This method is called

from message to message(PXP).



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ayer sw c ng ec no ogybased on flow switching

The method not processing all messages at layer 3 is called

flow switching（FS） .

3

2

1

3

2

1

3

2

1

3

2

1

3

2

1

3

2

1

3

2

1

3

2

1

3

2

1

3

2

1

The first message

Subsequent messages



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orwar ng process o ayer switch

thernetackage Layer 2

switchingmodule

MAC

tableVLANtable

Layer 3route

moduleRoutetable

hernet

ckage

Multi- layer stream

classfication

Streamclassfication

rule table

Multi-layer (accessbandwidth

restriction/prioritylevel) processing

property table

Processing propertytable

Package

forwarding

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Streamprocessingmodule

Package forwarding

Switnet

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Strategy/management server

broadcastpackages

andpackagesunable to

route



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Configure VLAN

VLAN 100 VLAN 200

Quidway(config)#vlan 100

Quidway(config-vlan100)#port e0/1 to e0/10

Quidway(config-vlan100)#vlan 200

Quidway(config-vlan200)#port e0/11 to e0/20Quidway(config-vlan200)#exit

Quidway(config)#

on gure rou ng n er aces



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on gure rou ng n er acesfor VLANs

VLAN 100 VLAN 200

1.1.1.254/24 2.2.2.254/24

Quidway(config)#vlan 100

Quidway(config-vlan100)#interface vlan 100

Quidway(config-if-vlan100)#ip address 1.1.1.254 255.255.255.0

Quidway(config-vlan100)#vlan 200

Quidway(config-vlan200)#interface vlan 200Quidway(config-if-vlan200)#ip address2.2.2.254 255.255.255.0

Quidway(config-vlan200)#exit

Quidway(config)#

on gure e au ga eways



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on gure e au ga ewaysfor the hosts

VLAN 100 VLAN 200

1.1.1.254/24 2.2.2.254/24

1.1.1.100/24

Default Gateway

1.1.1.254

2.2.2.100/24

Default Gateway

2.2.2.254

Configure default gateways for the host, pointing the

default gateway to the interface address of all VLANs atthe layer 3 switch

on gure rou ng



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on gure rou ngprotocol

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１２９．１０２．０．０／１６



２０２．３８．１６５．０／２４

　Ｉｎｔｅｒｆａｃｅ　ａｄｄｒｅｓｓ：

１０．２４．４０．１／２４

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１２９．１０２．０．１／１６

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１３１．１０９．１．１／２４

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１３１．１０９．１．０／２４

　Ｉｎｔｅｒｆａｃｅ　ａｄｄｒｅｓｓ：

２０２．３８．１６５．１／２４

S3526 C

S3526 B

S3526 A

on gure rou ng



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on gure rou ngprotocol

ＬＳＷ１ＬＳＷ２

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AS1

１．１．１．１１．１．１．２

１．１．１．３

１．１．２．３

１．１．２．４

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２．２．２．５

３．３．３．６

AS2

Area1

Area0



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Summary

Inter-VLAN communication is possible

only through routing solutions

To divide the network into differentVLANs is not the purpose of networking

To interconnect different VLANs, layer 3switch is superior to router

S3526 can realize multiple routingsolutions

Documents

SAT06 Vlan Routing