ﾚｽ
前ﾚｽ元ﾄﾋﾟ次ﾚｽ
ﾀｲﾄﾙ
Re: Re: Re: 問題ID: 18022について
ﾌｫｰﾗﾑ
最強WEB問題集CCNP SWITCH
投稿ﾕｰｻﾞ(投稿日)
(2016/9/7)
本文
そういうもの､というと役に立たないので｡
例えば以下のようなｺﾝﾌｨｸﾞと接続をﾍﾞｰｽに｡

接続
[code]
SW1 g0/1 --- g0/2 SW2 g0/1 --- g0/1 SW3
[/code]

ｺﾝﾌｨｸﾞ
[code]
SW1:
vlan 31,51
interface GigabitEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
interface Vlan31
ip address 192.168.31.1 255.255.255.0
no shutdown
interface Vlan51
ip address 192.168.51.1 255.255.255.0
no shutdown

SW2:
vlan 31
interface GigabitEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
interface GigabitEthernet0/2
switchport trunk encapsulation dot1q
switchport mode trunk
interface Vlan31
ip address 192.168.31.2 255.255.255.0
no shutdown

SW3:
vlan 51
interface GigabitEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
interface Vlan51
ip address 192.168.51.3 255.255.255.0
no shutdown
[/code]
SW2のshow interfaces trunkみると一目瞭然なのですが

■vlan 51作成前
[code]
SW2#show interfaces trunk

Port Mode Encapsulation Status Native vlan
Gi0/1 on 802.1q trunking 1
Gi0/2 on 802.1q trunking 1

Port Vlans allowed on trunk
Gi0/1 1-4094
Gi0/2 1-4094

Port Vlans allowed and active in management domain
Gi0/1 1,31
Gi0/2 1,31

Port Vlans in spanning tree forwarding state and not pruned
Gi0/1 1,31
Gi0/2 1,31
[/code]

作成後
[code]
SW2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
SW2(config)#vlan 51
SW2(config-vlan)#end
SW2#
%SYS-5-CONFIG_I: Configured from console by console
SW2#show interfaces trunk

Port Mode Encapsulation Status Native vlan
Gi0/1 on 802.1q trunking 1
Gi0/2 on 802.1q trunking 1

Port Vlans allowed on trunk
Gi0/1 1-4094
Gi0/2 1-4094

Port Vlans allowed and active in management domain
Gi0/1 1,31,51
Gi0/2 1,31,51

Port Vlans in spanning tree forwarding state and not pruned
Gi0/1 1,31
Gi0/2 1,31
[/code]
自分の理解できるVLANになったのでﾄﾗﾝｸｲﾝﾀｰﾌｪｰｽを通せるようになる､ってことですね｡
逆に､理解できないVLANがｾｯﾄされたﾌﾚｰﾑはどのVLANやどのｲﾝﾀｰﾌｪｰｽに送ってよいかわからないので､どこにも渡せない(=通信できない)となるわけです｡

ﾚｽ一覧

前ﾚｽ元ﾄﾋﾟ次ﾚｽ

Ping-tﾓﾊﾞｲﾙTOP

Copyright (c) 2010
Ping-t All rights reserved.