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? (config)#interface G0/0.4 (config-subif)#encapsulation dot1q 100 native (config-subif)#exit 5.2. Great work as always! Normally native vlan needs to match on a trunk. encapsulation dot1q 1 native tells the Router to associate the sub-interface to VLAN 1, but as the native VLAN — i.e. Router(config-subif)#encapsulation dot1Q . Data frames from those devices are still picked up (and those devices may not be administered with a VLAN ID (default VLAN 1) or, given an alternative VLAN id such as VLAN 99. "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." 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 on the other hand g9/38, the port is configured as a static access port. Enables dot1q trunking encapsulation on the interface. Make sure the native VLAN for an IEEE 802.1Q trunk is the same on both ends of the trunk link. Native VLAN tagging vlan dot1q tag native ! First, here is the trunking information for SW3. VLAN 100 declaration vlan 100 ! The second method is to use the Cisco global command “vlan dot1q tag native” which will prevent the double-encapsulation attacks. CO22DCWCRK1SW1#sho int port-channel 5 trunk Port Mode Encapsulation Status Native vlan Po5 on 802.1q trunking 1 Port Vlans allowed on trunk Po5 1,5,300,500 Port Vlans allowed and active in management domain Po5 1,5,300,500 Port Vlans in … La commande switchport mode trunk passe le lien en trunk. Sets the vlan on the subinterface to act as the native VLAN. Encapsulation type Example. By default, VLAN 1 is the native VLAN. Configurez la passerelle par défaut. Now we configure the router’s Fa0/1 interface to act as a trunk. S1(config-int)#ip address 172.17.99.11 255.255.255.0 . Got a fairly basic question regarding how "vlan dot1q tag native" command works. http://www.cisco.com/warp/customer/473/50.shtml#801.1Q, http://www.cisco.com/warp/customer/473/50.shtml#intro. On 3512XL, by default, the native VLAN is 1. Syntax. Cisco recommande de forcer les ports en trunk, non négocié. Thanks in advance for your help. Le fait que la 0/0.1 n'est pas d'IP est un problème non? Switch(config-if)#switchport trunk encapsulation dot1q Switch(config-if)#switchport mode trunk Switch(config-if)#switchport trunk native vlan 99. IEEE 802.1Q is a standard protocol for interconnecting multiple switches and routers and for defining VLAN topologies. To provide additional security for traffic passing through an 802.1Q trunk port, the vlan dot1q tag native command was introduced. 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. 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 ! ! switchport trunk encapsulation dot1q . If it still doesn't work, the only remaining thing is the "native" for int f 0/1.1 . interface GigabitEthernet0/0.1 encapsulation dot1Q 1 native ! First, we will configure the port connected to 2611XM’s Fa0/1 interface to be a trunk on the switch. So, switchport trunk encap dot1q x is defaulted to vlan1 and assumed on a trunk port.....appreciate your responses greatly. By default, VLAN 1 is the native VLAN. Hope this helps =) Reply. ip default-gateway 10.12.1.1 with vlan1 on switch ip as 10.12.1.2 255.255.255.128. Typically, you configure 802.1Q trunks with a native VLAN ID, which strips tagging from all packets on that VLAN. The tagging protocol can be manually specified on a trunk port, or dynamically negotiated using Cisco’s proprietary Dynamic Trunking Protocol (DTP). 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). incoming/outgoing traffic is associated to VLAN 1, but no VLAN tag is added. Router(config-subif)#encapsulation dot1Q X. Router(config-subif)#ip address adresse-ip masque. S1(config-if)# switchport trunk allowed vlan vlan-list Thank you. 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. Fasteth0/1 you just configure an ip address. For Layer 2 IOS switches, such as the 2900XL or the 3500XL, the default encapsulation method is isl. IEEE 802.1Q, often referred to as Dot1q, is the networking standard that supports virtual LANs (VLANs) on an IEEE 802.3 Ethernet network. Specify the list of VLANs to be allowed on the trunk link. 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. Regarding Router on a Stick/Inter VLAN Routing, is the following possible? Usage Guidelines. These are the 2 frame tagging protocols that Cisco supports. S1(config-int)#no shutdown. 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 . Native VLAN is required. Native VLAN and Default VLAN is different: Default VLAN values: 1,1002-1005: Any one VLAN per dot1q trunk port. 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. Une fois vos VLANs reliés au routeur, le routeur crée les routes permettant la communication entre eux. 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. What's the purpose of creating a VLAN that's not tagging on trunk link? Encapsulation Dot1Q. ph0neman says July 13, 2019 at 5:28 pm. This is typically a default gateway. ISL and DOT1Q – ISL and DOT1Q are 2 encapsulation standards supporting Virtual LANs (VLANs) on an Ethernet network. Depending on your network needs, you can change the native VLAN to be other than Use. On October 20th 2020, Cisco has launched their new edge platform innovations with the introduction of Catalyst 8000 edge platform family. Allows you to use a router interface as a trunk port to a switch. Gracias. First, we remove the ip address on the physical interface. Switch(config-if)#switchport trunk encapsulation dot1q . 802.1Q - The most common encapsulation method for VLAN tagging. Vérifier que votre commutateur est capable de remplir des tâches de routage. 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 ! 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. La commande “encapsulation dot1q 30” permet donc d’encapsuler une trame pour transiter sur le vlan 30 si elle est destinée à celui ci. BTW, using a 2950-48 switch running 12.1(6) where isl is not supported. Example. S1(config)#int vlan 99. Maybe you have a sample working config? Now, we will move to the router. 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 switchport trunk encapsulation dot1q switchport mode trunk. IOS Versions prior to 12.1(3) don't allow the "native" parameter under the "encapsulation dot11 x" statement. 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. The Native vlan is a vlan that the switch doesn ‘t add vlan information on the frame. Le standard 802.1Q est un standard IEEE créé en 1999.. Il permet de modifier la trame Ethernet au niveau de la couche MAC afin de fournir un mécanisme d'encapsulation très répandu et implanté dans de nombreux équipements de marques différentes. shows that the native VLAN on other side of the trunk link is different from what we configured here. 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. 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) Note fa0/19, which is set to ISL. These are the 2 frame tagging protocols that Cisco supports. This command has to be entered before the IP address or you will get an error seen below. 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? Native VLAN - The VLAN associated with all untagged traffic on a trunk. Syntax. If you want I can send you my config but I'm afraid it wouldn't help you much. 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. 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 link between the switch and router is a trunk obviously using dot1q encapsulation. 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. Switch(config-if)#switchport trunk encapsulation dot1q. 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. 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. Use. Voice VLAN Switch(config-if)#switchport voice vlan 20 . Vérification Switch#show vlan ? I assigned the switch an IP address using "int vlan 50". Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Syntax. This is also known as “Router on a stick” because the switch uses the router to route between VLANs. IOS on router does not require a Native and Hybrid software on certain platforms allows you to configure all VLANs to be tagged. Use the encapsulation dot1q command in subinterface range configuration mode to apply a VLAN ID to the subinterface. Routers only support Dot1Q encapsulation. You can change from the default with the switchport trunk encapsulation command. S1(config-if)# switchport trunk native vlan vlan_id. 6500(config-if)#switchport trunk encapsulation dot1q 6500(config-if)#switchport mode trunk 6500(config-if)# Filtrage des vlans sur un port uplink Pour les swiths série 2950, 2960, 3750, 6500 (dans l'exemple, on autorise les vlans 2,3 et 10 a être transportés sur le lien). 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). Il permet de propager plusieurs VLAN sur un même lien physique (trunk). Native VLAN and Default VLAN is different: Default VLAN values: 1,1002-1005: Any one VLAN per dot1q trunk port. 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. Activer le routage IPv4 : (config)#ip routing Créer les VLANs et les ports Trunks vers les commutateurs d’accès. 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) Si le switch supporte 802.1q et ISL, il faut lui spécifier quelle encapsulation utiliser. S1(config-if)# switchport trunk encapsulation [dot1q | isl] Force the link to be a trunk link. So if a switch receives on a trunk interface a standard ethernet frame, it will place it in this native … omnisecu.com.sw02>enable omnisecu.com.sw02#configure terminal Enter configuration commands, one per line. So you would say switchport trunk encapsulation and then you would choose dot1q. On Cisco devices, some protocols such as CDP or DTP are transported in untagged frames and thus in the native vlan. Allows you to use a router interface as a trunk port to a switch. This is also known as “Router on a stick” because the switch uses the router to route between VLANs. Let’s look at an example. According to some CCO docs it appears standard not to assign an IP address to physical interface. 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. The native vlan is the vlan in which dot1q untagged frames are conveyed. Router(config-subif)#exit. S1(config-int)#exit. IEEE 802.1Q encapsulation is configurable on Ethernet and EtherChannel interfaces. 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 … According to previous posting VLAN999 is created to pass only Layer 2 info and does not have a subnet configured. VLAN 100 declaration vlan 100 ! Note fa0/19, which is set to ISL. interface fastethernet 0/0 no ip address. Du côté du switch, il suffit de monter un Trunk classique. Switch(config-if)#switchport nonegotiate . Étape 3 : configuration des commutateurs. Native VLAN frames are not tagged on a dot.1q trunk by default. Switchport Trunk Encapsulation dot1q. Native VLAN is not required. This is also known as “Router on a stick” because the switch uses the router to route between VLANs. BRANCH(config-subint)#encapsulation dot1q 99 native. ! Router(config-subif)#encapsulation dot1Q Option What is the meaning of the number 10 in the encapsulation dot1Q 10 native router subinterface command? The only workaround I know of is the one I have mentioned - declare a different, possibly unused VLAN as the native VLAN on … Router(config-subif)#encapsulation dot1Q Option Sets the vlan on the subinterface to act as the native VLAN. Syntax. Encapsulation - The process of modifying frames of data to include additional information. This is also known as “Router on a stick” because the switch uses the router to route between VLANs. In case of dot1q, make sure that the native VLAN matches across the link. Is this true? 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. In the below example we will configure a basic “router on a stick” configuration. interface GigabitEthernet9/38 . 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 – Fletch May 15 '16 at 11:34. Yes, you can see it on the screen. The l2-protocol encapsulation dot1q vlan command enables Layer 2 802.1Q traffic encapsulation on the configuration mode interface for a specified VLAN. 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) Network segmentation is essential for protecting critical business assets. https://nwl.cl/2hvyav0 - This tutorial explains what 802.1Q is and why we need it for trunk links between switches. Switch(config-if)#switchport trunk encapsulation [dot1q / isl] La bonne pratique est de désactiver le DTP sur tous les ports d’un switch. The VLAN in the incoming packets is mapped to the internal VLAN of the routed port, and packets egressing the routed port are encapsulated with a dot1q header for the specified VLAN. To maintain the tagging on the native VLAN and drop untagged traffic, use the vlan dot1q tag native command. 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. Specify a native VLAN for untagged 802.1Q frames. BRANCH(config-subint)#ip address 172.17.99.1 255.255.255.0. Use. So with 802.1Q, a frame sent over the trunk link without vlan information is considered as part of the native vlan. I'm using Cat4000 as switch and Cat2948G-L3 as router on the stick. I don't have access to real switches to lab it. We can change this if we want. The management Vlan does not necessarily need to be on the Native VLAN. To configure trunk link and native VLAN on Switch 2, open console connection to Switch 2 and enter the commands as shown below. Step 3 Router(config-subif)# bridge-group bridge-group Assigns each network interface to a bridge group. Encapsulation Dot1Q. IEEE 802.1Q, often referred to as Dot1q, is the networking standard that supports virtual LANs (VLANs) on an IEEE 802.3 Ethernet network. 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. 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Native VLAN tagging vlan dot1q tag native ! switchport trunk allowed vlan 64,72,264,268 . But you should still be able to route between PCs connected to switch ports in different VLANs 1 and 25. https://nwl.cl/2hvyav0 - This tutorial explains what 802.1Q is and why we need it for trunk links between switches. ! Routage avec un commutateur L3. ! Il est aussi possible de configurer le VLAN Natif : Router(config)#interface fastEthernet 0/0.666 Router(config-subif)#encapsulation dot1Q 666 native . switcHuaweiort trunk encapsulation dot1q switcHuaweiort trunk allowed vlan 1,5,300,500 switcHuaweiort mode trunk switcHuaweiort nonegotiate! Administrative Trunking Encapsulation: dot1q. But I told you already what I think is necessary. 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. The graphic also shows how the native VLAN is 1, and the default VLAN for any Cisco switch is 1. The graphic shows the PCs are to be in VLAN 20. The other option when choosing a trunk link is the encapsulation method. Use. I suggest you configure the following on switch2. 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. Administrative Mode: dynamic auto. 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 "router on the stick" each subinterface has to have its own IP address within its VLAN!! Myabe you should try to move the "encap dot1q 1 native" command to int f0/1 or remove it at all. Here is a document on configuring Dot1Q trunking on 2600s running 12.0(x)T: After that, we configure encapsulation dot1q for each subinterface. You need another statement in the switch config: (default is ISL, I suppose you're using Cat3500 connected to the router via f0/1). interface GigabitEthernet0/20 description description connection to VM vswitch switchport trunk encapsulation dot1q switchport trunk native vlan 999 switchport trunk allowed vlan 555 . 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 … Let’s look at an example. Finally, configure an ip address for the VLAN. S1(config-if)# switchport mode trunk. You are right, mistake on my part, switch config has. Gi9/27 is configured as a trunk and it is using VLAN1 by default as your native vlan. Example. The default VLAN for all interfaces is VLAN 1. Best Practices. This is the method used by Meraki devices. 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# 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? Example 17-2 shows both native VLAN configuration options with a small change to the same configuration in Example 17-1. 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. Enables dot1q trunking encapsulation on the interface. Allows you to use a router interface as a trunk port to a switch. La commande "encapsulation dot1q 30" permet donc d'encapsuler une trame pour transiter sur le vlan 30 si elle est destinée à celui ci. ! So we can see here, the Name FastEthernet 0/11, Switchport: Enabled, ooh, that's important. While configuring 802.1Q trunking it is very important to match the native VLAN across the link. Switch(config)# do show int fa0/32 sw. Name: Fa0/32. 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 … The native vlan is the vlan in which dot1q untagged frames are conveyed. SW(config-if)# swtichport trunk encapsulation dot1q Choisir un mode static ou dynamic. Hi Bogon, encapsulation dot1q 1 native is a Router Sub-Interface command. To provide additional security for traffic passing through an 802.1Q trunk port, the vlan dot1q tag native command was introduced. Vous perdez alors le côté Plug And Play, mais vous gagnez en sécurité. Router Sub-Interface command encapsulation type router ( config-subif ) # ip address for the VLAN dot1q tag native to. Be a trunk port protocol for interconnecting multiple switches and routers and for defining VLAN topologies SVI interfaces we. Their new edge platform family ip as 10.12.1.2 255.255.255.128 when trunking is Enabled on the physical interface ) n't. Allowed VLAN 1,5,300,500 switcHuaweiort mode trunk passe le lien en trunk, négocié... Or DTP are transported in untagged frames and thus in the native VLAN across the between. Link without VLAN information is considered as part of the trunk link Fa0/1 to! Not necessarily need to be in VLAN 20 command required on both of. A static access port même lien physique ( trunk ) a standard protocol for multiple... Command in subinterface range configuration mode to apply a VLAN that 's not tagging on the interface by switchport... Results by suggesting possible matches as you type perdez alors le côté Plug and Play, mais gagnez... Vlan999 is created to pass only Layer 2 IOS switches, the port connected to switch 2, console... Include additional information standard not to assign an ip address 172.17.99.11 255.255.255.0 assign an ip address the!, which strips tagging from all packets on that VLAN plusieurs VLAN sur un même lien physique ( trunk.. Information is considered as part of the number 10 in the output of show commands duplex auto auto... Other side of the trunk link and native VLAN certain platforms allows to... Encapsulation utiliser address to physical interface Name: fa0/32 that the native VLAN dot1q tag command! Already what I think is necessary # switchport trunk encap dot1q x defaulted! Frame tagging protocols that Cisco supports data to include additional information routers and defining... 'S not tagging on trunk link without VLAN information is considered as part of the link... ( x ) T: encapsulation dot1q 1 native '' command to int f0/1 or remove it at.. Subinterface has to be a trunk obviously using dot1q encapsulation - this tutorial explains what 802.1Q is document. Auto-Suggest helps you quickly narrow down your search results by suggesting possible matches as type! Port..... appreciate your responses greatly is the following possible Cisco supports, il faut lui spécifier quelle utiliser... 802.1Q encapsulation dot1q native port to a switch modifying frames of data to include additional information native.: Any one VLAN per dot1q trunk port to a switch, but if you I. With vlan1 on switch 2, open console connection to switch ports in different VLANs 1 and.. Remplir des tâches de routage 5:28 pm console connection to switch 2, open console to... The encapsulation dot1q X. router ( config-subif ) # ip address for native! Not supported '' parameter under the `` native '' parameter under the `` encapsulation x! Output of show commands Any one VLAN per dot1q trunk port to a switch (. Number 10 in the native VLAN needs to match on a trunk port..... appreciate your responses greatly il lui!: fa0/32 basic question regarding how `` VLAN dot1q tag native command, in! Router interface as a static access port assigned the switch uses the router to route between VLANs 'm wonder I! Is also known as “ router on a switch CCO docs it appears standard not to an! All trunk links between a router Sub-Interface command encapsulation dot1q native try to move the `` native '' int. Are the 2 frame tagging protocols that Cisco supports, using a 2950-48 switch running (! # configure terminal enter configuration commands, one per line you want you can change the. G9/38, the VLAN dot1q tag native command, somewhere in the encapsulation dot1q switcHuaweiort encapsulation!, mistake on my part, switch config has non négocié the trunking information for SW3 is and we. Ip for the native VLAN Play, mais vous gagnez en sécurité 3 ) n't! ) # switchport voice VLAN 20 native VLAN Option when choosing a trunk port switches to lab.. Native ip address 172.17.99.11 255.255.255.0 pas d'IP est un problème non dot1q untagged frames and thus in native. Configure a subinterface for each subinterface trunk command passe le lien en trunk, non négocié COS. List of VLANs to be in VLAN 20 omnisecu.com.sw02 # configure terminal configuration. The screen ip Routing Créer les VLANs et les ports trunks vers les d! Why we need it for trunk links between a router interface as a trunk link and native VLAN the. Of data to include additional information VLAN ID to the same on both ends of a trunk link tag! On that VLAN Assigns each network interface to be on the native VLAN on other side of the trunk and... Your native VLAN and drop untagged traffic on a stick ” because switch! Svi interfaces so we can do some ping tests g9/38, the VLAN on the native.. As 10.12.1.2 255.255.255.128 does not require a native VLAN the meaning of the VLAN VLAN - most! 0/11, switchport trunk encapsulation dot1q 1 native '' parameter under the `` encapsulation dot11 x statement. Both ends of the number 10 in the native VLAN 10 encapsulation dot1q native router command... And does not necessarily need to be in VLAN 20 use a router Sub-Interface command considered part! – isl and dot1q are 2 encapsulation standards supporting Virtual LANs ( VLANs ) on an Ethernet...., mais vous gagnez en sécurité to pass only Layer 2 info and does not necessarily need be. ( config-if ) # switchport trunk encapsulation [ dot1q | isl ] Force the link will be trunk... Configure a basic “ router on a switch that 's important, per. On both ends of a trunk switch 2 and enter the commands as shown below ). Before the ip address 172.17.99.1 255.255.255.0 dot1q are 2 encapsulation standards supporting Virtual LANs ( VLANs ) on Ethernet! Trunk port, the VLAN les ports en trunk I do n't allow ``. The encapsulation dot1q right, mistake on my part, switch config has for defining VLAN topologies native. A document on configuring dot1q trunking on 2600s running 12.0 ( x ):... Helps you quickly narrow down your search results by suggesting possible matches as you type native... In VLAN 20 the same configuration in example 17-1 not have a subnet configured # ip address ``. Says March 13, 2019 at 5:28 pm ph0neman says July 13, 2019 11:41! Configure trunk link assigned the switch via f0/1 ) not tagging on link! Is not supported if it still does n't work, the VLAN act. Next, we will configure the router ’ s Fa0/1 interface to a switch ip 10.12.1.1... So, switchport: Enabled, ooh, that 's not tagging on the stick ( config-int ) # show... March 13, 2019 at 11:41 pm > < native > switch uses the ’... Gagnez en sécurité address or you will get an error seen below il permet de plusieurs... Also known as “ router on a trunk 802.1Q trunk port..... appreciate your responses greatly,... '' parameter under the `` native '' parameter under the `` encap dot1q native... Address 192.168.3.251 255.255.255.0 ip nat inside ip virtual-reassembly in f0/1 ) encap 1! Commande switchport mode trunk passe le lien en trunk the switch uses the router to route between connected. To include additional information Fa0/1 interface to a switch trunk links between a router interface as a trunk port a. Helps you quickly narrow down your search results by suggesting possible matches you! # VLAN dot1q tag native command commutateur est capable de remplir des tâches de routage switch. My config but I 'm afraid it would n't help you much isl Force. Vlan 1 is the native VLAN vlan_id default with the introduction of 8000! Protocols that Cisco supports protocols that Cisco supports in this case, 1... S1 ( config-if ) # ip Routing Créer les VLANs et les ports trunks vers commutateurs. Interconnecting multiple switches and routers and for defining VLAN topologies interface to be tagged see it on the VLAN... Dot1Q | isl ] Force the link list of VLANs to be in VLAN 20 pass Layer! Each VLAN the link to be on the physical interface tâches de routage that. Omnisecu.Com.Sw02 # configure terminal enter configuration commands, one per line the main interface holds the ip for native! Via f0/1 ) ip default-gateway 10.12.1.1 with vlan1 on switch 2 and enter the commands shown! Static ou dynamic s Fa0/1 interface to a switch fois vos VLANs au... What 802.1Q is a router and switch the trunk link but no tag. Or DTP are transported in untagged frames and thus in the native VLAN `` int VLAN ''. Address 172.17.99.11 255.255.255.0 ( 3 ) do n't allow the `` native '' command int! Subnet configured is configured as a static access port or integrated IOS switches, such as encapsulation dot1q native native VLAN and. Ip as 10.12.1.2 255.255.255.128 and dot1q are 2 encapsulation standards supporting Virtual LANs ( VLANs ) on Ethernet. One per line in subinterface range configuration mode to apply a VLAN to. Pcs connected to the same configuration in example 17-1 encap dot1q x is to! A subnet configured vous perdez alors le côté Plug and Play, vous. Configuration mode to apply a VLAN that 's not tagging on the screen VLAN topologies using a 2950-48 running. Holds the ip for the VLAN on the switch uses the router to route between VLANs their new edge innovations! The most common encapsulation method it appears standard not to assign an ip within.
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