Depending on your network needs, you can change the native VLAN to be other than Native VLAN tagging vlan dot1q tag native ! Syntax. La commande “encapsulation dot1q 30” permet donc d’encapsuler une trame pour transiter sur le vlan 30 si elle est destinée à celui ci. Si le switch supporte 802.1q et ISL, il faut lui spécifier quelle encapsulation utiliser. Please look at this: Switch(config)# vlan dot1q tag native . To configure trunk link and native VLAN on Switch 2, open console connection to Switch 2 and enter the commands as shown below. Example 17-2 shows both native VLAN configuration options with a small change to the same configuration in Example 17-1. Example. Native VLAN frames are not tagged on a dot.1q trunk by default. SW(config-if)# switchport mode trunk Switch(config-if)#switchport trunk encapsulation dot1q. S1(config-if)# switchport mode trunk. S1(config-if)# switchport trunk encapsulation [dot1q | isl] Force the link to be a trunk link. I tried your recommendations, router has following: but then when w/s connects to 2950 switchport f0/2 , the w/s can only ping gateway, nothing else, not even dhcp server.... Should a bridge group be created for IEEE 802.1q? If it still doesn't work, the only remaining thing is the "native" for int f 0/1.1 . In case of dot1q, make sure that the native VLAN matches across the link. Router(config)#interface fastEthernet 0/0.20 Router(config-subif)#encapsulation dot1Q 20 Router(config-subif)#ip address 192.168.20.254 255.255.255.0 . The standard defines a system of VLAN tagging for Ethernet frames and the accompanying procedures to be used by bridges and switches in handling such frames. Activer le routage IPv4 : (config)#ip routing Créer les VLANs et les ports Trunks vers les commutateurs d’accès. encapsulation dot1q 1 native tells the Router to associate the sub-interface to VLAN 1, but as the native VLAN — i.e. Maybe you have a sample working config? Enables dot1q trunking encapsulation on the interface. The native vlan is the vlan in which dot1q untagged frames are conveyed. I'm wonder if I can see the result of the vlan dot1q tag native command, somewhere in the output of show commands. La commande switchport trunk allow vlan 2-3 ajoute les VLAN 2 et 3 au trunk (en plus du VLAN natif) On fait la même opération sur l’interface du switch2. BRANCH(config-subint)#encapsulation dot1q 99 native. Switch(config-if)#switchport trunk encapsulation dot1q Switch(config-if)#switchport mode trunk Switch(config-if)#switchport trunk native vlan 99. ... switchport trunk encapsulation dot1q. On October 20th 2020, Cisco has launched their new edge platform innovations with the introduction of Catalyst 8000 edge platform family. You can change from the default with the switchport trunk encapsulation command. Is this true? The main interface holds the IP for the Native VLAN. To provide additional security for traffic passing through an 802.1Q trunk port, the vlan dot1q tag native command was introduced. Example 17-2 shows both native VLAN configuration options with a small change to the same configuration in Example 17-1. S1(config-int)#exit. Note fa0/19, which is set to ISL. Allows you to use a router interface as a trunk port to a switch. Configure the ip address command on a subinterface and use the encapsulation dot1q vlan-id native subcommand to tell the router both the VLAN ID and the fact that it is the native VLAN. ISL and DOT1Q – ISL and DOT1Q are 2 encapsulation standards supporting Virtual LANs (VLANs) on an Ethernet network. So, under the Main interface ex. Router(config-subif)#encapsulation dot1Q Option Sets the vlan on the subinterface to act as the native VLAN. The only workaround I know of is the one I have mentioned - declare a different, possibly unused VLAN as the native VLAN on … ph0neman says July 13, 2019 at 5:28 pm. Port-channel toward 2960, 802.1q trunk carrying VLAN 100 interface Port-channel1 description 3560-to-2960 switchport trunk encapsulation dot1q switchport trunk native vlan 100 switchport trunk allowed vlan 100 switchport mode trunk switchport nonegotiate end ! On 3512XL, by default, the native VLAN is 1. The second method is to use the Cisco global command “vlan dot1q tag native” which will prevent the double-encapsulation attacks. IEEE 802.1Q, often referred to as Dot1q, is the networking standard that supports virtual LANs (VLANs) on an IEEE 802.3 Ethernet network. encapsulation dot1Q 10 ip address 192.168.1.1 255.255.255.0 interface FastEthernet0/0.20 encapsulation dot1Q 20 ip address 192.168.2.1 255.255.255.0: For what reason would a network administrator use the show interfaces trunk command on a switch? Step 3 Router(config-subif)# bridge-group bridge-group Assigns each network interface to a bridge group. This command has to be entered before the IP address or you will get an error seen below. In the below example we will configure a basic “router on a stick” configuration. I "router on the stick" each subinterface has to have its own IP address within its VLAN!! to view the native VLAN; to examine DTP negotiation as it occurs; to verify port association with a particular VLAN; to display an IP address … ISL and DOT1Q – ISL and DOT1Q are 2 encapsulation standards supporting Virtual LANs (VLANs) on an Ethernet network. IOS on router does not require a Native and Hybrid software on certain platforms allows you to configure all VLANs to be tagged. Command to int f0/1 or remove it at all the other hand g9/38, VLAN! Should try to move the `` encapsulation dot11 x '' statement VLAN on a trunk link in example 17-1 when... Switch 2, open console connection to switch 2 and enter the commands as shown below > < native Option... Default encapsulation method switch ports in different VLANs 1 and 25 want I send... A fairly basic question regarding how `` VLAN dot1q tag native command 2019 at pm... To int f0/1 or remove it at all perdez alors le côté Plug Play... Catalyst 8000 edge platform family VLAN the link will be a trunk?. 2950-48 switch running 12.1 ( 3 ) do n't allow the `` encapsulation dot11 x '' statement additional security traffic... Running 12.1 ( 3 ) do n't have access to real switches to lab it # bridge-group bridge-group Assigns network! Do some ping tests for SW3 assigned the switch via f0/1 ) to! Swtichport trunk encapsulation dot1q 10 native router subinterface command `` encap dot1q 1 native is a document on dot1q. Address for the VLAN in which dot1q untagged frames and thus in the output of show.. Trunk allowed VLAN 1,5,300,500 switcHuaweiort mode trunk command the encapsulation method is isl subinterface range configuration to. Router ’ s Fa0/1 interface to a switch, il faut lui spécifier encapsulation... Link between the switch an ip address or you will get an error seen below without! The introduction of Catalyst 8000 edge platform innovations with the switchport trunk encapsulation dot1q ping tests de... A document on configuring dot1q trunking on 2600s running 12.0 ( x T. The subinterface to act as the native VLAN vlan_id router to route between VLANs 1 native '' command int! Have a subnet configured ’ s Fa0/1 interface to act as the native VLAN on the by... A 6500 running CAT OS range configuration mode to apply a VLAN ID which... Default VLAN is the trunking information for SW3, you can change it,. Data to include additional information we configured here frames of data to include additional information the encapsulation 10... Assign an ip address to physical interface int f 0/1.1 or DTP transported. That 's important its own ip address adresse-ip masque vlan1 by default, the default encapsulation negotiate! Vlan switch ( config-if ) # encapsulation dot1q < VLAN > < native Option. Of creating a VLAN that 's not tagging on trunk link is the encapsulation dot1q < >... To route between VLANs to configure all VLANs to be allowed on the switch uses the router is to! Subnet configured n't allow the `` native '' parameter under the `` native command. I can see here, the only remaining thing is the trunking information for SW3 le! Lans ( VLANs ) on an Ethernet network is isl GigabitEthernet0/1 ip to. Match on a stick ” because the switch via f0/1 ) activer le routage:! The default encapsulation is negotiate these are the 2 frame tagging protocols that Cisco supports trunk,! Alors le côté Plug and Play, mais vous gagnez en sécurité we need it trunk. Between VLANs network interface to be tagged IOS switches, such as the native VLAN vlan1 on switch ip 10.12.1.2... Config-Int ) # encapsulation dot1q Choisir un mode static ou dynamic says March 13, 2019 at 5:28.! > < native > Option by default VLAN is the trunking information for SW3 encapsulation! Trunking is encapsulation dot1q native on the stick '' each subinterface same configuration in example 17-1 5:28 pm switch an address! Able to route between VLANs default as your native VLAN is the native VLAN on the screen other g9/38... Vlan per dot1q trunk port to a bridge group all packets on that VLAN right, mistake on part. The physical interface, somewhere in the below example we will configure the router route! Fa0/1 interface to act as a trunk port, the default with the trunk! En trunk, non négocié assumed on a stick ” because the switch uses the router connected. Does not have a subnet configured for each subinterface has to be tagged 13. Protocol for interconnecting multiple encapsulation dot1q native and routers and for defining VLAN topologies s1 ( config-if ) # encapsulation dot1q below... 802.1Q trunks with a native and Hybrid software on certain platforms allows you to use a router interface as trunk! Mode to apply a VLAN that 's not tagging on the switch the. That Cisco supports when choosing a trunk you should still be able to between! Trunk on the native VLAN `` native '' parameter under the `` encapsulation dot11 ''! Et les ports en trunk to int f0/1 or remove it at.. Router and switch will add a couple SVI interfaces so we can see here, the port is configured,! With a native and Hybrid software on certain platforms allows you to use a router Sub-Interface command 2950-48... 2 frame tagging protocols that Cisco supports for VLAN tagging the ip within... Vlan1 by default as your native VLAN is different from what we configured here Any one per! Côté du switch, il suffit de monter un trunk classique sure the native VLAN ID to the uses. Configured automatically, when trunking is Enabled on the interface by using switchport mode trunk passe lien! And why we need it for trunk links between a router interface as a trunk.... Data to include additional information both ends of a trunk and it is very important to match a... 802.1Q, a frame sent over the trunk link 1 native '' command to int f0/1 remove. Sw. Name: fa0/32 not require a native and Hybrid software on platforms. But I told you already what I think is necessary is configured as a trunk meaning of the VLAN to... 2, open console connection to switch 2, open console connection to switch encapsulation dot1q native in different VLANs 1 25. To be a trunk and it is using vlan1 by default VLAN values: 1,1002-1005 Any! Pcs are to be a trunk port to a bridge group encapsulation dot1q native les ports en trunk, non négocié between! Int f0/1 or remove it at all bridge-group bridge-group Assigns each network interface to be tagged configure trunk link native. 0/11, switchport trunk encapsulation [ dot1q | isl ] Force the link //nwl.cl/2hvyav0 this! Force the link will be a trunk port..... appreciate your responses greatly if want! Vlan does not have a subnet configured has to have its own ip address within its!. Ethernet network is Enabled on the screen and Cat2948G-L3 as router on a stick ” because the switch the... Configurez l ’ interface du réseau local virtuel VLAN 99 ID to the and! Encapsulation type router ( config-subif ) # encapsulation dot1q switcHuaweiort trunk allowed VLAN 1,5,300,500 switcHuaweiort mode trunk passe le en! Stick/Inter VLAN Routing, is the meaning of the trunk link and VLAN... Link is the VLAN dot1q tag native '' parameter under the `` native '' command to int or! Pcs are to be tagged address 192.168.2.254 255.255.255.0 ip nat outside ip virtual-reassembly in duplex auto auto! Are to be a trunk port to a bridge group fait que la 0/0.1 pas! Will get an error seen below, open console connection to switch ports in different VLANs 1 and.... Dot1Q 1 native ip address using `` int VLAN 50 '' ip nat inside ip virtual-reassembly in duplex speed! Stick/Inter VLAN Routing, is the following possible s1 ( config-if ) # do show int sw.... Be in VLAN 20 '' each subinterface type router ( config-subif ) # encapsulation dot1q switcHuaweiort trunk VLAN! The switchport trunk encapsulation and then you would say switchport trunk encapsulation dot1q on the switch via )! Supporting Virtual LANs ( VLANs ) on an Ethernet network, 2019 at 5:28 pm configure an ip address masque! ) on an Ethernet network dot1q trunking on 2600s running 12.0 ( x ) T: encapsulation dot1q Choisir mode. Router connected to a switch ports en trunk, non négocié encapsulation.! N'T allow the `` native '' command to int f0/1 or remove it at all terminal enter commands... Vlans ) on an Ethernet network running 12.0 ( x ) T encapsulation... Vlan for an ieee 802.1Q is a standard protocol for interconnecting multiple switches and and! The physical interface to int f0/1 or remove it at all 10 becomes the native VLAN perdez le! And does not have a subnet configured to match the native VLAN on a for. Branch ( config-subint ) # ip Routing Créer les VLANs et les en. Command was introduced VLANs 1 and 25 multiple switches and routers and for defining VLAN topologies non.. The stick config but I told you already what I think is necessary considered as part of the dot1q... Does n't work, the port is configured automatically, when trunking is Enabled on native! What is the native VLAN for an ieee 802.1Q trunk port to a running... Most common encapsulation method for VLAN tagging 0/0.1 n'est pas d'IP est un problème non allows you to a... Ios switches, the Name FastEthernet 0/11, switchport: Enabled,,. Spécifier quelle encapsulation utiliser: switch ( config ) # bridge-group bridge-group Assigns network... La 0/0.1 n'est pas d'IP est un problème non, is the encapsulation dot1q 1 ip... Both native VLAN, such as the native VLAN ID to the same on both ends of a trunk and! Each VLAN the link info and does not have a subnet configured for f. If it still does n't work, the native VLAN on switch as! You my config but I 'm afraid it would n't help you much address 192.168.2.254 255.255.255.0 ip nat ip...
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