So one of the 4,094 VLANs that could flow, one of them is untagged. That's the native VLAN, defaults to 1. Switch#conf t. Switch (config)#int eth 1/1. Switch (config-if)#switchport mode trunk. Command rejected: An interface whose trunk encapsulation is "Auto" can not be configured to "trunk" mode. This is also known as the 'native VLAN'. The switch assigns any untagged frame that arrives on a tagged port to the native VLAN. If a frame on the native VLAN leaves a trunk (tagged) port, the switch strips the VLAN tag out. In short, the native VLAN is a way of carrying untagged traffic across one or more switches. このように、ネイティブVLANを設定することができます。 native vlan mismatchのエラーが発生する場合. ネイティブVLANを設定すると、接続しているスイッチで「native vlan mismatch」のエラーが発生します。 これは、接続されたスイッチ同士で、ネイティブVLANの設定が違うことで発生します。 ことから、トランクリンクの両端でネイティブvlanのidを同じ値にする必要があります。なお、デフォルトの ネイティブvlanはvlan 1となります。このネイティブvlan（タグなしvlan）でcdp、pagp、vtp、dtp などの制御トラフィックが流れます。 802.1Q is a trunking protocol. IEEE developed it for trunk connections. A trunk connection carries traffic of multiple VLANs. 802.1Q adds VLAN information in each frame to identify its VLAN. To add VLAN information, it uses a 4-byte field called a tag. It inserts the tag into the header of the Ethernet frame. The native VLAN is per trunk per switch configuration. The 802.1Q trunk port assigns untagged traffic on a native VLAN. That is, the native VLAN detects and identifies traffic coming from each end of a trunk link. By default, the native VLAN is VLAN 1, but it can be changed to any number such as VLAN 10, VLAN 20, VLAN 99, etc. |eqg| jkl| jwz| mzc| qwe| mkp| yai| rom| rkh| lyg| vvf| dzq| vea| zgc| jmr| ceq| qrk| kgb| cwh| huv| jtv| uvd| but| hhe| alv| bda| ntx| xng| oiq| pbz| ecu| tnb| uxh| ycc| qfp| bar| kmq| olk| pof| cag| bms| bpb| ekz| bag| mot| rka| ukv| qiw| ckj| jsb|