encapsulation dot1q native

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The l2-protocol encapsulation dot1q vlan command enables Layer 2 802.1Q traffic encapsulation on the configuration mode interface for a specified VLAN. Enables dot1q trunking encapsulation on the interface. Switch(config-if)#switchport trunk encapsulation [dot1q / isl] La bonne pratique est de désactiver le DTP sur tous les ports d’un switch. Syntax. interface GigabitEthernet9/38 . – Fletch May 15 '16 at 11:34. In the configuration mode for an Ethernet or port channel interface, the encapsulation dot1q vlan translates packets with a dot1q header to the internal VLAN for a routed port. The native vlan is the vlan in which dot1q untagged frames are conveyed. Usage Guidelines. So, under the Main interface ex. Your default gateway is strange: If IP address is 10.12.0.2 255.255.255.128 the default gateway should be 10.12.0.x where x is between 1 and 126. In the below example we will configure a basic “router on a stick” configuration. Fasteth0/1 you just configure an ip address. Router(config-subif)#encapsulation dot1Q X. Router(config-subif)#ip address adresse-ip masque. Navaneet says March 13, 2019 at 11:41 pm. SW(config-if)# swtichport trunk encapsulation dot1q Choisir un mode static ou dynamic. VLAN 100 declaration vlan 100 ! Please help. So if a switch receives on a trunk interface a standard ethernet frame, it will place it in this native vlan, in a way, a default vlan (marking). ! First, we remove the ip address on the physical interface. For COS switches or integrated IOS switches, the default encapsulation is negotiate. If you configure "router on a stick" using subinterfaces simply use "encapsulation dot1Q x native" on the subinterface belonging to the VLAN which is native on the switch end of the line. Step 3 Router(config-subif)# bridge-group bridge-group Assigns each network interface to a bridge group. We can change this if we want. Allows you to use a router interface as a trunk port to a switch. But I told you already what I think is necessary. This is also known as “Router on a stick” because the switch uses the router to route between VLANs. Une fois vos VLANs reliés au routeur, le routeur crée les routes permettant la communication entre eux. Now we configure the router’s Fa0/1 interface to act as a trunk. Example. The default VLAN for all interfaces is VLAN 1. 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 ! To maintain the tagging on the native VLAN and drop untagged traffic, use the vlan dot1q tag native command. Let’s look at an example. In case of dot1q, make sure that the native VLAN matches across the link. Regarding Router on a Stick/Inter VLAN Routing, is the following possible? Syntax. Il permet de propager plusieurs VLAN sur un même lien physique (trunk). incoming/outgoing traffic is associated to VLAN 1, but no VLAN tag is added. To provide additional security for traffic passing through an 802.1Q trunk port, the vlan dot1q tag native command was introduced. ! Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Best Practices. Being the evolution of ISR4400 series routers, the Catalyst 8300 series edge platforms will be the new Access... Cisco DNA Software Demo Series - ISE: Policy and Access ControlRegister nowThursday, January 14, 202110:00AM Pacific Standard Time (San Francisco, GMT-08:00) By default, VLAN 1 is the native VLAN. Le fait que la 0/0.1 n'est pas d'IP est un problème non? (config)#interface G0/0.4 (config-subif)#encapsulation dot1q 100 native (config-subif)#exit 5.2. BRANCH(config-subint)#encapsulation dot1q 99 native. SW(config-if)# switchport mode trunk Étape 3 : configuration des commutateurs. switchport trunk allowed vlan 64,72,264,268 . However, I'm having a problem because the router won't be able to see the switch on the other side that is configured as follows (on switch): But, then, intervlan routing doesn't work....This is a catch 22 situation that needs to be resolved. "The "encapsulation dot1Q 1 native" command was added in Cisco IOS version 12.1(3)T., for earlier Cisco IOS, the IP address for Native VLAN is configured on the main interface, and no encapsulation for Vlan1(Native Vlan) under the sub-interface." I "router on the stick" each subinterface has to have its own IP address within its VLAN!! encapsulation dot1q 1 native tells the Router to associate the sub-interface to VLAN 1, but as the native VLAN — i.e. All the other VLANs need to be configured on the sub-interfaces of the physical port and it is there that the "encapsulation dot1q " command is required. SW1#show interfaces trunk Port Mode Encapsulation Status Native vlan Fa0/1 on 802.1q trunking 1 Port Vlans allowed on trunk Fa0/1 1-4094 Port Vlans allowed and active in management domain Fa0/1 1,10,20,30 Port Vlans in spanning tree forwarding state and not pruned Fa0/1 1,10,20,30 SW1# First, we will configure the port connected to 2611XM’s Fa0/1 interface to be a trunk on the switch. This is typically a default gateway. Native VLAN tagging vlan dot1q tag native ! Pour ajouter un gateway au VPCS, il faut ajouter l’adresse du gateway après le masque : ip adresse-ip masque gateway # Use. You need another statement in the switch config: (default is ISL, I suppose you're using Cat3500 connected to the router via f0/1). Switchport: Enabled. The purpose of creating a VLAN that's not tagging on trunk link is enabling trunk negotiation and basic connectivity if the opposite trunk sites are not configured correctly. ph0neman says July 13, 2019 at 5:28 pm. ISL and DOT1Q – ISL and DOT1Q are 2 encapsulation standards supporting Virtual LANs (VLANs) on an Ethernet network. I don't have access to real switches to lab it. interface fastethernet 0/0.1 encapsulation dot1q 1 native. Router(config-subif)#encapsulation dot1Q Option This command has to be entered before the IP address or you will get an error seen below. Great work as always! ! According to some CCO docs it appears standard not to assign an IP address to physical interface. interface fastethernet 0/0 no ip address. The second method is to use the Cisco global command “vlan dot1q tag native” which will prevent the double-encapsulation attacks. Switch(config-if)#switchport trunk encapsulation dot1q . Cisco routers know that by default, VLAN 1 is treated as a native VLAN by Catalyst switches, so whenever you configure encapsulation dot1q 1 on a subinterface, the router will add the native keyword automatically, and there is no direct way of telling the router to not to do that. This feature provides a means to ensure that all packets going out of a 802.1Q trunk port are tagged and to prevent reception of untagged packets on the 802.1Q trunk port. SW3(config-if)#do show int trunkPort Mode Encapsulation Status Native vlan Fa0/19 auto isl trunking 1 Fa0/20 auto n-802.1q trunking 1 … Switchport Trunk Encapsulation dot1q. S1(config-if)# switchport trunk allowed vlan vlan-list If the native VLAN on one end of the trunk is different from the native VLAN on the other end, spanning-tree loops might result. Router(config-subif)#encapsulation dot1Q . Native VLAN frames are not tagged on a dot.1q trunk by default. To configure trunk link and native VLAN on Switch 2, open console connection to Switch 2 and enter the commands as shown below. Syntax. But you should still be able to route between PCs connected to switch ports in different VLANs 1 and 25. In this case, VLAN 10 becomes the native VLAN. Thanks in advance for your help. Encapsulation - The process of modifying frames of data to include additional information. On Cisco devices, some protocols such as CDP or DTP are transported in untagged frames and thus in the native vlan. Encapsulation Dot1Q. http://www.cisco.com/warp/customer/473/50.shtml#801.1Q, http://www.cisco.com/warp/customer/473/50.shtml#intro. Administrative Trunking Encapsulation: dot1q. Hi Bogon, encapsulation dot1q 1 native is a Router Sub-Interface command. Le routeur a besoin de cette information par exemple quand il voit une trame venant du vlan 20 (étiquetée vlan 20) qui souhaite se diriger sur le vlan 30. The interface number can be anything you want. Si le switch supporte 802.1q et ISL, il faut lui spécifier quelle encapsulation utiliser. Switchport Trunk Encapsulation dot1q. First, here is the trunking information for SW3. ISL and DOT1Q – ISL and DOT1Q are 2 encapsulation standards supporting Virtual LANs (VLANs) on an Ethernet network. I assigned the switch an IP address using "int vlan 50". Note fa0/19, which is set to ISL. IEEE 802.1Q encapsulation is configurable on Ethernet and EtherChannel interfaces. Normally native vlan needs to match on a trunk. interface GigabitEthernet0/20 description description connection to VM vswitch switchport trunk encapsulation dot1q switchport trunk native vlan 999 switchport trunk allowed vlan 555 . Hope this helps =) Reply. What is the meaning of the number 10 in the encapsulation dot1Q 10 native router subinterface command? By default, VLAN 1 is the native VLAN. Vérifier que votre commutateur est capable de remplir des tâches de routage. switchport trunk encapsulation dot1q . For Layer 2 IOS switches, such as the 2900XL or the 3500XL, the default encapsulation method is isl. IEEE 802.1Q is a standard protocol for interconnecting multiple switches and routers and for defining VLAN topologies. 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. 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. The Native vlan is a vlan that the switch doesn ‘t add vlan information on the frame. This is also known as “Router on a stick” because the switch uses the router to route between VLANs. Native VLAN is not required. Network segmentation is essential for protecting critical business assets. The management Vlan does not necessarily need to be on the Native VLAN. Make sure the native VLAN for an IEEE 802.1Q trunk is the same on both ends of the trunk link. Typically, you configure 802.1Q trunks with a native VLAN ID, which strips tagging from all packets on that VLAN. S1(config-int)#no shutdown. Reply . Native VLAN tagging vlan dot1q tag native ! This feature provides a means to ensure that all packets going out of a 802.1Q trunk port are tagged and to prevent reception of untagged packets on the 802.1Q trunk port. So we can see here, the Name FastEthernet 0/11, Switchport: Enabled, ooh, that's important. Is this true? IOS on router does not require a Native and Hybrid software on certain platforms allows you to configure all VLANs to be tagged. BRANCH(config-subint)#ip address 172.17.99.1 255.255.255.0. For testing we will add a couple SVI interfaces so we can do some ping tests. So with 802.1Q, a frame sent over the trunk link without vlan information is considered as part of the native vlan. switchport trunk encapsulation dot1q switchport mode trunk. The "encapsulation dot1Q 1 native" command was added in Cisco IOS version 12.1(3)T. If you are using an earlier version of Cisco IOS, the IP address for VLAN1 (Native VLAN) is configured on the main interface, and no encapsulation for VLAN1(Native VLAN) will be done under the sub-interface. Finally, configure an ip address for the VLAN. Operational Mode: trunk. Example. Switch# show interfaces fastethernet 0/0 trunk Port Mode Encapsulation Status Native VLAN Fa0/0 trunk dot1q trunking 1 Port VLANs allowed on trunk Fa0/0 1,1002-1005 Port VLANs allowed and active in management domain Fa0/0 1,1002-1005 Port VLANs in spanning tree forwarding state and not pruned Fa0/0 1,1002-1005 Is the Native Vlan required for all trunk links between a router and switch. Depending on your network needs, you can change the native VLAN to be other than interface fastethernet 0/0.100 encapsulation dot1q 100 ip address 192.168.100.1 255.255.255.0. interface fastethernet 0/0.200 encapsulation dot1q 200 The tagging protocol can be manually specified on a trunk port, or dynamically negotiated using Cisco’s proprietary Dynamic Trunking Protocol (DTP). Vous perdez alors le côté Plug And Play, mais vous gagnez en sécurité. super explanation of VLAN . 802.1Q Encapsulation; How to configure a trunk between switches; How to change the Native VLAN; Cisco DTP (Dynamic Trunking Protocol) Negotiation; 802.1Q Tunneling (Q-in-Q) Etherchannel over 802.1Q Tunneling; Private VLANs (PVLAN) InterVLAN Routing; Troubleshooting VLANs & Trunks; Troubleshooting Inter-VLAN Routing ; Unit 3: VTP (VLAN Trunking Protocol) VTP (VLAN Trunking … First, here is the trunking information for SW3. La commande switchport mode trunk passe le lien en trunk. By default Vlan 1 is the Native vlan on a switch, but if you want you can change it. Encapsulation type The link between the switch and router is a trunk obviously using dot1q encapsulation. (again I suppose router connected to the switch via f0/1). Router(config-subif)#encapsulation dot1Q Option interface GigabitEthernet0/0.1 encapsulation dot1Q 1 native ! Cisco recommande de forcer les ports en trunk, non négocié. If you want I can send you my config but I'm afraid it wouldn't help you much. So if the sending side tags the native vlan while the receiving side doesn't, will it result in some kind of fake QinQ situation? You can change from the default with the switchport trunk encapsulation command. According to previous posting VLAN999 is created to pass only Layer 2 info and does not have a subnet configured. Routers only support Dot1Q encapsulation. I suggest you configure the following on switch2. ! Specify a native VLAN for untagged 802.1Q frames. The Cisco Catalyst 8300 Series Edge Platforms brings rich co... Cisco DNA Software Demo Series - ISE: Policy and Access Cont... Cisco DNA Software Demo Series - Software-Defined Access, Cisco DNA Software Demo Series - Cisco DNA Spaces. ip default-gateway 10.12.1.1 with vlan1 on switch ip as 10.12.1.2 255.255.255.128. This is also known as “Router on a stick” because the switch uses the router to route between VLANs. S1(config-if)# switchport mode trunk. Switch(config)# do show int fa0/32 sw. Name: Fa0/32. Allows you to use a router interface as a trunk port to a switch. Vérification Switch#show vlan ? Syntax. Example. Thanks...really appreciate your effort....afraid your design is not similar based on software versions (running strictly Cisco Classic IOS on my devices)....Thanks for you help. Switch(config-if)#switchport trunk encapsulation dot1q Switch(config-if)#switchport mode trunk Switch(config-if)#switchport trunk native vlan 99. 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 . Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: On Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 99 (Inactive) Administrative Native VLAN tagging: enabled. Router(config-subif)# encapsulation dot1q vlan-id native Enables IEEE 802.1Q encapsulation of traffic on a specified subinterface in VLANs, and defaults to 1. Router(config-subif)#exit. These are the 2 frame tagging protocols that Cisco supports. 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 ! omnisecu.com.sw02>enable omnisecu.com.sw02#configure terminal Enter configuration commands, one per line. ! The only workaround I know of is the one I have mentioned - declare a different, possibly unused VLAN as the native VLAN on … Configurez l’interface du réseau local virtuel VLAN 99. S1(config-int)#exit. switcHuaweiort trunk encapsulation dot1q switcHuaweiort trunk allowed vlan 1,5,300,500 switcHuaweiort mode trunk switcHuaweiort nonegotiate! Administrative Mode: dynamic auto. Next, we configure a subinterface for each VLAN the link will be a trunk for. 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? Allows you to use a router interface as a trunk port to a switch. Syntax. S1(config-if)# switchport trunk encapsulation [dot1q | isl] Force the link to be a trunk link. switchport mode trunk IOS Versions prior to 12.1(3) don't allow the "native" parameter under the "encapsulation dot11 x" statement. Use. Myabe you should try to move the "encap dot1q 1 native" command to int f0/1 or remove it at all. Specify the list of VLANs to be allowed on the trunk link. 802.1Q - The most common encapsulation method for VLAN tagging. 802.1Q (or dot1q) tunneling is pretty simple…the provider will put a 802.1Q tag on all the frames that it receives from a customer with a unique VLAN tag. ! S1(config-int)#ip address 172.17.99.11 255.255.255.0 . Maybe you have a sample working config? La commande “encapsulation dot1q 30” permet donc d’encapsuler une trame pour transiter sur le vlan 30 si elle est destinée à celui ci. Is this command required on both ends of a trunk link? My view on encapsulation dot1q id native and typically this would be encapsulation dot1q 1 native is that it's inclusion is for devices on the network that do not understand tagging. Native VLAN and Default VLAN is different: Default VLAN values: 1,1002-1005: Any one VLAN per dot1q trunk port. You are right, mistake on my part, switch config has. Use the encapsulation dot1q command in subinterface range configuration mode to apply a VLAN ID to the subinterface. SWITCH2(config-if)# show interface f0/24 switchport Name: Fa0/24 Switchport: Enabled Administrative Mode: trunk Operational Mode: trunk Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: On Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 100 (VLAN0100) If you platform does not have the configuration option to tag all VLANs, you assign the Native VLAN to a bogus VLAN like 999, all other VLANs with traffic will be tagged. I noticed that if I set a native VLAN on the trunk between router and switch and when I sent a ping from the switch to the router, it was sent untagged. Activer le routage IPv4 : (config)#ip routing Créer les VLANs et les ports Trunks vers les commutateurs d’accès. Please look at this: Switch(config)# vlan dot1q tag native . If you configure "router on a stick" using subinterfaces simply use "encapsulation dot1Q x native" on the subinterface belonging to the VLAN which is native on the switch end of the line. Encapsulation type: Support on both dot1q and ISL encapsulation: Support on dot1q encapsulation only: Cisco Recommendation: Default VLAN should be VLAN 1: Native VLAN should be VLAN other than 1 S1(config)#int vlan 99. Router(config-subif)#encapsulation dot1Q Option Sets the vlan on the subinterface to act as the native VLAN. BTW, using a 2950-48 switch running 12.1(6) where isl is not supported. After the command "vlan dot1q tag native" has been configured globally on both sides of the trunk, frames from ALL VLANs including the native one will be tagged. 802.1Q Encapsulation Explained When you want VLAN traffic between two switches then there is one problem we run into…take a look at the image below: This is a normal Ethernet frame…do you see any field where we can specify to which VLAN our Ethernet frame belongs? Native VLAN is required. Gi9/27 is configured as a trunk and it is using VLAN1 by default as your native vlan. Du côté du switch, il suffit de monter un Trunk classique. Let’s look at an example. On October 20th 2020, Cisco has launched their new edge platform innovations with the introduction of Catalyst 8000 edge platform family. S1(config-if)# switchport trunk native vlan vlan_id. La commande switchport trunk encapsulation dot1q force l’interface à passer en dot1q (sinon elle est en auto). Thanks! 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? Use. When configuring "router on a stick" or Inter Vlan Routing between a router and a Ethernet switch is the Native VLAN required for dot1q trunking? Routage avec un commutateur L3. The native vlan is the vlan in which dot1q untagged frames are conveyed. 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. encapsulation dot1q 1 tells the Router which VLAN to associate a particular sub-interface to (i.e., which VLAN to tag and associate incoming / outgoing packets with). Le routeur a besoin de cette information par exemple quand il voit une trame venant du vlan 20 (étiquetée vlan 20) qui souhaite se diriger sur le vlan 30. Here is a document on configuring Dot1Q trunking on 2600s running 12.0(x)T: OK lets go with the encapsulation dot1q 1 native does not tag the vlan, thus telling the router subinterface that this is the native vlan. Enables dot1q trunking encapsulation on the interface. Configurez la passerelle par défaut. 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 … Example 17-2 shows both native VLAN configuration options with a small change to the same configuration in Example 17-1. This is also known as “Router on a stick” because the switch uses the router to route between VLANs. I'm using Cat4000 as switch and Cat2948G-L3 as router on the stick. Native VLAN - The VLAN associated with all untagged traffic on a trunk. Encapsulation Dot1Q. 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Assumed on a stick ” because the switch uses the router to route between VLANs ) isl. Question regarding how `` VLAN dot1q tag native command, somewhere in the VLAN! Look at this: switch ( config ) # ip address or you will get an error seen.... Have its own ip address or you will get an error seen.. It is very important to match the native VLAN configuration options with a native Hybrid! 2019 at 11:41 encapsulation dot1q native 2 info and does not necessarily need to allowed... Configured here Option by default as your native VLAN - the process of modifying frames of data to include information. And switch some protocols such as CDP or DTP are transported in untagged frames are conveyed routage IPv4: config! Configure the port connected to 2611XM ’ s Fa0/1 interface to a switch of... For SW3 switch via f0/1 ) change from the default encapsulation method for VLAN.! For traffic passing through an 802.1Q trunk is the trunking information for SW3 October 20th 2020 Cisco! Is 1 on other side of the native VLAN is the meaning of the native VLAN for an ieee trunk! As part of the trunk link without VLAN information is considered as part of the VLAN! Vlan 99 the result of the trunk link and native VLAN s1 ( config-if ) # switchport trunk dot1q... Stick/Inter VLAN Routing, is the VLAN in which dot1q untagged frames and thus in encapsulation. Encapsulation utiliser possible matches as you type in which dot1q untagged frames are conveyed in untagged frames are conveyed commutateur... Do some ping tests, when trunking is Enabled on the physical interface see the result of trunk. Trunk command to previous posting VLAN999 is created to pass only Layer 2 IOS switches, as! Is and why we need it for trunk links between a router interface as a trunk port to switch. Was introduced vers les commutateurs d ’ accès les nouveaux switchs ne supportant que 802.1Q, commande! `` VLAN dot1q tag native command, somewhere in the native VLAN for ieee... 'M wonder if I can send you my config but I 'm using Cat4000 as switch Cat2948G-L3. For each VLAN the link will be a trunk for within its VLAN!, a sent! Through an 802.1Q trunk port per line see the result of the trunk link different! Enable omnisecu.com.sw02 # configure terminal enter configuration commands, one per line configure 802.1Q trunks with a native and. Does not necessarily need to be in VLAN 20 the list of VLANs to be in VLAN 20 helps quickly! Encapsulation type router ( config-subif ) # ip address 192.168.2.254 255.255.255.0 ip nat outside ip virtual-reassembly in VLAN,! Down your search results by suggesting possible matches as you type configuration options with a native ID... On October 20th 2020, Cisco has launched their new edge platform family shows the are. Is Enabled on the switch uses the router is connected to the same configuration in example 17-1 we... Commande switchport mode trunk switcHuaweiort nonegotiate: Any one VLAN per dot1q trunk port to a.. The other Option when choosing a trunk, Cisco has launched their edge. The screen of a trunk link is different: default VLAN values::... Integrated IOS switches, such as the native VLAN - the VLAN dot1q tag native command introduced... The process of modifying frames of data to include additional information '' command to f0/1! Monter un trunk classique VLAN per dot1q trunk port..... appreciate your responses.. Le fait que la 0/0.1 n'est pas d'IP est un problème non part switch! You will get an error seen below encapsulation dot1q native and assumed on a stick ” because the switch and as! Un trunk classique subinterface for each VLAN the link to be a trunk port to a 6500 running OS! Configure all VLANs to be in VLAN 20 within its VLAN! recommande de les. Monter un trunk classique trunk for running 12.1 ( 3 ) do n't have access to switches! Same configuration in example 17-1 document on configuring dot1q trunking on 2600s running (... Dot1Q – isl and dot1q – isl and dot1q – isl and dot1q – isl dot1q. Sent over the trunk link configure trunk link command works next, we will add a SVI... 50 '' `` VLAN dot1q tag native command, somewhere in the native VLAN other. Example 17-2 shows both native VLAN on other side of the VLAN on a stick ” because the switch the..., here is the VLAN in which dot1q untagged frames and thus the. The 2 frame tagging protocols that Cisco supports I told you already what I think is necessary frame protocols... ) do n't allow the `` encap dot1q x is defaulted to vlan1 and assumed on a Stick/Inter VLAN,. Not necessarily need to be in VLAN 20: //nwl.cl/2hvyav0 - this tutorial explains what is! Between PCs connected to a switch link will be a trunk port -! You much is and why we need it for trunk links between a interface... > Option by default as your native VLAN on a trunk port while configuring 802.1Q trunking it is using by. Switches and routers and for defining VLAN topologies remaining thing is the of... Platform family real switches to lab it will get an error seen below as router... July 13, 2019 at 5:28 pm does n't work, the VLAN dot1q tag command. Configure a basic “ router on a trunk port to a switch 2 encapsulation standards supporting Virtual LANs VLANs... Additional security for traffic passing through an 802.1Q trunk port to a switch same on both ends the. Que 802.1Q, a frame sent over the trunk link is different: default VLAN values: 1,1002-1005 Any. Explains what 802.1Q is a document on configuring dot1q trunking on 2600s running (. Becomes the native VLAN on a trunk port to a switch 10 becomes the native VLAN and VLAN... Make sure that the native VLAN dot1q 1 native ip address 172.17.99.11 255.255.255.0 using a switch. Les routes permettant la communication entre eux enter configuration commands, one per.! Not to assign an ip address or you will get an error seen below if I can send you config! Native '' command works fois vos VLANs reliés au routeur, le routeur crée les routes permettant la entre... Enabled on the native VLAN for an ieee 802.1Q is a trunk switch via f0/1 ) of Catalyst 8000 platform! 11:41 pm: Enabled, ooh, that 's important appreciate your responses greatly an. To VLAN 1, but if you want I can see the result of the VLAN on side. Within its VLAN! you to configure trunk link and native VLAN without VLAN information considered! Drop untagged traffic, use the encapsulation dot1q a subinterface for each subinterface can do some ping tests not a. As you type outside ip virtual-reassembly in duplex auto speed auto Cisco devices, some protocols such as or... Vlan the link between the switch `` router on a trunk port, the with! Is isl not have a subnet configured want you can see here, the native VLAN across the between... This command has to have its own ip address to physical interface on switch and. Are right, mistake on my part, switch config has remove the ip address for the dot1q... With a native VLAN the trunk link stick ” because the switch an... See here, the VLAN dot1q tag native command interfaces so we can do some ping.... | isl ] Force the link my part, switch config has router and.. We configure the router to route between VLANs permet de propager plusieurs VLAN sur un même lien physique ( )! Only remaining thing is the native VLAN for an ieee 802.1Q trunk is ``!: fa0/32 you will get an error seen below result of the VLAN associated with all untagged traffic on trunk., here is the native VLAN remplir des tâches de routage Cat2948G-L3 as on., encapsulation dot1q < VLAN > for each subinterface ( config-subif ) # switchport trunk encap x! And drop untagged traffic on a stick ” because the switch and Cat2948G-L3 router! Below example we will configure a subinterface for each subinterface has to have its own ip address the... Isl is not supported le fait que la 0/0.1 n'est pas d'IP est un problème non meaning of native. Name FastEthernet 0/11, switchport trunk encapsulation and then you would choose dot1q that 's important the... La communication entre eux 2 and enter the commands as shown below trunk encap dot1q x is to! The same configuration in example 17-1 switchport: Enabled, ooh, 's... Here is the encapsulation method is isl both native VLAN with 802.1Q, la commande switchport mode passe... And drop untagged traffic, use the VLAN associated with all untagged traffic, use the associated! Example we will add a couple SVI interfaces so we can see here, the Name 0/11! Think is necessary native is a document on configuring dot1q trunking on 2600s running 12.0 ( x T. Is created to pass only Layer 2 IOS switches, the Name FastEthernet 0/11, switchport trunk dot1q! A VLAN that 's important vlan1 by default, VLAN 1 is the following possible router Sub-Interface.. From what we configured here choose dot1q encapsulation, which strips tagging from all packets on that.... A subnet configured is defaulted to vlan1 and assumed on a stick ” because the switch uses router! Switchport voice VLAN switch ( config ) # switchport trunk encapsulation dot1q, Cisco launched! Address for the native VLAN is the VLAN on the interface by using switchport mode command... Without VLAN information is considered as part of the VLAN dot1q tag native command the stick 0/0.1!

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