[AipuWaton] Kunzwisisa Kukosha kweVLANs

Ko 8 waya dziri muEthernet tambo dzinoitei

VLAN (Virtual Local Area Network) tekinoroji yekutaurirana iyo zvine musoro inokamura iyo LAN yemuviri kuita akati wandei nhepfenyuro. VLAN yega yega inzvimbo yekutepfenyura uko mauto anogona kutaurirana zvakananga, nepo kutaurirana pakati peVLAN akasiyana kunorambidzwa. Nekuda kweizvozvo, mameseji ekutepfenyura anogumira kuVLAN imwe chete.

Content

· Nei maVLAN achidiwa
·VLAN vs. Subnet
·VLAN Tag uye VLAN ID
·Mhando dzeVLAN Interfaces uye VLAN Tag Handling Mechanisms
·Kushandisa Scenarios yeVLANs
·Matambudziko ane VLAN mu Cloud Environments

Nei maVLAN achidiwa

Early Ethernet network yaive data networking technologies yakavakirwa paCSMA/CD (Carrier Sense Multiple Access/Collision Detection) yaishandisa nzira dzekutaurirana dzakagovaniswa. Kana huwandu hwevaenzi hwakawedzera, zvakakonzera kudhumhana kwakakomba, madutu ekutepfenyura, kukanganisa kwakanyanya kwekuita, uye kunyange kudzimwa kwetiweki. Kunyangwe kubatanidza maLAN uchishandisa Layer 2 zvishandiso zvaigona kugadzirisa nyaya dzekudhumhana, zvakaramba kutsaura mameseji ekutepfenyura nekuvandudza network network. Izvi zvakakonzera kugadzirwa kweVLAN tekinoroji, iyo inoparadzanisa LAN kuita maVLAN akawanda ane musoro; VLAN yega yega inomiririra nzvimbo yekutepfenyura, ichigonesa kutaurirana mukati meVLAN sekunge yaive LAN uku ichidzivirira kutaurirana kweVLAN nekuvharira mameseji ekutepfenyura mukati meVLAN.

配图1(為什么需要VLAN)-1

Mufananidzo 1: Basa reVLANs

Saka, maVLAN ane zvinotevera zvakanakira:

Kudzikamisa Broadcast Domains: Nzvimbo dzekutepfenyura dzinovharirwa mukati meVLAN, kuchengetedza bandwidth uye kuwedzera network kugadzirisa kugona.
· Kuvandudza LAN Chengetedzo: Mameseji kubva kune akasiyana maVLAN anoparadzaniswa panguva yekufambisa, zvichireva kuti vashandisi mukati meVLAN imwe havagone kutaurirana zvakananga nevashandisi mune imwe VLAN.
· Yakawedzera Network Kusimba: Mhosho dzinongoiswa kune imwe VLAN, saka nyaya dziri mukati meVLAN imwe chete hadzina kukanganisa kushanda kwakajairika kwemamwe maVLAN.
· Flexible Virtual Workgroup Kuvaka: MaVLAN anogona kupatsanura vashandisi mumapoka ebasa akasiyana, achibvumira nhengo dzeboka rimwe chete rebasa kuti rishande pasina kuganhurirwa kune imwe nzvimbo yemuviri, zvichiita kuti kuvaka nekugadzirisa network kuve nyore uye kuchinjika.

VLAN vs. Subnet

Nekuenderera mberi nekugovanisa network chikamu chekero dzeIP kuita akati wandei ma subnets, iyo yakaderera yekushandiswa mwero we IP kero nzvimbo uye kuomarara kweaviri-level IP kero inogona kugadziriswa. Zvakafanana neVLANs, subnets inogona zvakare kutsaura kutaurirana pakati pevaenzi. mauto eVLAN akasiyana haakwanise kutaurirana zvakananga, sezvakangoita mauto mune akasiyana subnet asingakwanisi. Zvisinei, hapana kunyorerana kwakananga pakati pezviviri izvi.

VLAN Subnet
Musiyano Inoshandiswa kupatsanura Layer 2 network.
  Mushure mekugadzirisa VLAN interfaces, vashandisi muVLAN dzakasiyana vanogona kutaurirana chete kana nzira yatangwa.
  Kusvikira ku4094 VLANs inogona kutsanangurwa; nhamba yemidziyo mukati meVLAN haina kuganhurirwa.
Relation Mukati meVLAN imwechete, imwe kana akawanda ma subnets anogona kutsanangurwa.

VLAN Tag uye VLAN ID

Kugonesa ma switch kusiyanisa mameseji kubva kune akasiyana maVLAN, ndima inozivisa VLAN ruzivo inofanirwa kuwedzerwa kune iwo mameseji. Iyo IEEE 802.1Q protocol inotsanangura kuti 4-byte VLAN tag (inozivikanwa seVLAN Tag) inowedzerwa kuEthernet data mafuremu kuratidza ruzivo rweVLAN.

配图2 (VLAN Tag pamwe neVLAN ID)-2

Iyo VID munda mune data data inoratidza iyo VLAN iyo iyo data data ndeye; iyo data data inogona kuendeswa chete mukati meVLAN yayo yakatarwa. Munda weVID unomiririra VLAN ID, iyo inogona kubva ku0 kusvika 4095. Sezvo 0 uye 4095 zvakachengetwa neprotocol, chiyero chakanaka cheVLAN IDs ndeye 1 kusvika 4094. Mafaira ose e data akagadziriswa mukati nekuchinja anotakura VLAN tags, nepo mamwe maturusi (akadai semashandisi emushandisi nemaseva) akabatana kune switch anongotumira uye anogashira echinyakare Ethernet mafuremu asina VLAN tag.

配图3(VLAN间用户的二层隔离)-3

Naizvozvo, kuti udyidzane nemidziyo iyi, chinja maficha anofanira kuziva echinyakare Ethernet mafuremu uye kuwedzera kana kubvisa VLAN tag panguva yekufambisa. Iyo VLAN tag yakawedzerwa inoenderana neiyo interface's default VLAN (Port Default VLAN ID, PVID).

配图4-4
配图5 通过VLANIF实现VLAN间用户的三层互访-5
微信图片_20240614024031.jpg1

Mhando dzeVLAN Interfaces uye VLAN Tag Handling Mechanisms

Mumanetiweki azvino, vashandisi veVLAN imwe chete vanogona kubatanidzwa kune akasiyana switch, uye panogona kuve neakawanda maVLAN anotenderera pakuchinja. Kana kupindirana kwemushandisi kuchidikanwa, machinjiro ari pakati pema switch anofanirwa kukwanisa kuziva uye kutumira mafaira edata kubva kune akawanda maVLAN panguva imwe chete. Zvichienderana nezvinhu zvakabatana uye mafambisirwo anofambiswa nemafuremu, kune marudzi akasiyana-siyana eVLAN interfaces kuti agare akasiyana ekubatanidza uye network.

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