No encapsulation dot1q command You must also use the encapsulation dot1q command on the subinterface to specify the trunk VLAN to use on outgoing packets. The encapsulation dot1Q 20 command has not been configured. Conventions. vlan-id—Virtual LAN identifier. Ethernet Interfaces Commands. Cisco has dropped its ISL encap protocol in all new switch models; so there is no need to specify dot1q encap method as it is default. 1q tag of 2 will be terminated on the Bundle-Ether10. 1(3)T. 1Q or dot1q Trunking Protocol Explained The encapsulation dot1q command enables a Layer 2 sub-interface to receive packets with a specified 802. 1Q (dot1q), and specifies the VLAN identifier Step 5. 1Q. 10 Router(config-if)# encapsulation dot1q 10 The following example shows how to map 802. 1Q encapsulation on a subinterface: switch encapsulation dot1q. 31(13a),i have the vlans all set up on the switches and can get into subinterface mode on the router but when i try to enter do Physical and Logical ATM Interface Commands. Seetheencapsulation dot1q commandformoreinformation. VLAN range configuration is not supported, for example This document describes the configuration of Ethernet services, including configuring link aggregation, VLANs, Voice VLAN, VLAN mapping, QinQ, GVRP, MAC table, STP/RSTP/MSTP, SEP, and so on. bandwidth 2048. Configuration procedure. Switch(config-if)#switchport trunk encapsulation dot1q. It has been a very long time since I have seen a switch configured to use isl, so the command to set encapsulation type is not used very frequently in live environments. 71 MB) PDF - This Chapter (1. encapsulation dot1Q vlan-id. 3560config-if)# switchport trunk encapsulation dot1q. switchport trunk encapsulation dot1q is an optional command that defines the encapsulation type of this trunk. 1(3)T Here is an example of how to do that: c2600#configure terminal However, the subinterface configuration command encapsulation dot1q also supports the native keyword, allowing to explicitly designate a VLAN as the native VLAN. Refer to the exhibit. E Commands. ) You can also specify a range of interfaces along with the associated dot1q VLAN IDs as shown in this example. 1Q encapsulation on a subinterface: switch encapsulation dot1Q. If the devices is configured to tag encapsulation dot1q. So encapsulation dot1q is enabled by default when you enable trunk. the "switchport trunk encapsulation dot1q" command is only valid is ISL trunking is also supported on the I have a Cisco 2960 switch that is not allowing me to setup switchport trunk encapsulation dot1q on a trunking interface. xconnect peer-ip-addr vc-id encapsulation mpls. PDF - Complete Book (19. 1Q encapsulation on a subinterface: switch Book Title. Device(config-subif)# encapsulation dot1Q 1105: Enables IEEE 802. 1Q frames ingress on an l2transport sub-interface: Router# configure Router(config)# interface HundredGigE 0/0/0/24. bridge-dot1q encap. If it doesn't take that then do a "sh int <x> capabilities" and it should show you which encapsulation methods are supported. 1Q tunneling (aka Q-in-Q) is often used by Metro Ethernet providers as a layer 2 VPN for customers. PDF - Complete Book (21. The ios indeed does not contain the Encapsulation command. Use the interface type number. Associates an 802. If it doesnt work, you need the IP code as pointed out above. 1Q encapsulated traffic from the specified vlan-id. Configure Host A, Host B, Host C, and Host D: (To remove an interface, use the no form of this command. Allows you to use a router interface as a trunk port to a switch. Let‟s change it to 802. The switch does support Layer 2 trunks and Layer 3 VLAN interfaces, which provide equivalent capabilities. 1Q as the trunking technology, then you can do these other commands. 41 MB) View with Adobe Reader on a variety of devices encapsulation dot1q 1 native ip add 192. The show capabilities shows that the interface can If the command takes, then try your sub interfaces. The encapsulation options are ignored with the no form of the command. 1Q encapsulation of traffic on a specified subinterface in a virtual LAN (VLAN), use the encapsulation dot1q command. In most cases, the switch then supports only IEEE 802. interface fa0/1. Note dot1q vlan vlan-id [{vlan-id2 |any}] SyntaxDescription vlan-id IDofthesubinterface. Jon The no shutdown command has not been configured. Switchport Trunk Encapsulation dot1q. For more information on document conventions, refer to the Cisco Technical Tips Conventions. . 2 ENCAPSULATION DOT1Q <SP-vlan ID> SECOND-DOT1Q <CE-vlan ID> Configures the subinterface so that it executes a double IEEE 802. The range is To define the matching criteria that maps the ingress dot1q, QinQ, or untagged frames on an interface to the appropriate service instance, use the encapsulation dot1q command in service instance configuration mode. 0. 45 MB) View with Adobe Reader on a variety of devices Router(config-int-range)# encapsulation dot1Q vlan-id . 1Q encapsulation is confi gurable on Ethernet and EtherChann el interfaces. A dot1q VLAN subinterface is a virtual Cisco IOS interface that is associated with a The no shutdown command has not been configured. This is also known as “Router on a stick” With the particular module you have it only supports dot1q trunks. The "encapsulation dot1Q 1 native" command is used on cisco router to a associate a subinterface to a VLAN, configured as Native on the Switch. 1. Use the ip address address mask command in To disable encapsulation, use the no form of this command. You may have to "no" the command and re-add it without native at the end. dot1q. Use the encapsulation dot1q command in interface range mode to apply a VLAN ID to each subinterface within the range specified by the interface range command. You do not need encap dot1q command on main router interface when you connect it to a switch and do not use ROAS concept. The dot1q vlan command is is replaced by the encapsulation dot1q command. 1 logical interface. Edit: a basic trunk port config would be Switchport mode trunk Switchport no negotiate (optional but recommended) Switchport trunk allowed vlans 10, 20, 30 (optional) Issue the no encapsulation dot1q command to remove the incorrect configuration. Try to use ISL on both ends of the links. 1Q encaps ulation of traffic on a spec ified subinterface, use the encapsulation dot1q command. Here is what i've tried. I checked and he was right. jesserc68. The encapsulation list-extended dot1q command supports only comma-separated list of outer and inner VLAN tags or VLAN ranges along with untagged Ethernet frames (no spaces allowed Ethernet Virtual Connections You use the ethernet evc evc-id global configuration command to create an Ethernet virtual connection (EVC). You are however using the wrong command, it should be - "switchport trunk encapsulation dot1q" ie. And I'd like to enable encapsulation dot1q on that trunk "#switchport trunk encapsulation dot1q" but it is not allowed on this Cisco ("unrecongized command"). The IP address on CiscoVille is incorrect. When you configure "switchport mode trunk" the encapsulation will use dot1q. Mark as New; Bookmark; Subscribe; Mute; Subscribe to RSS Feed; Permalink; Print; Report Inappropriate Content ‎03-27-2012 08:28 PM. 1q tag to a specific logical interface. A network administrator has 802. Interface-port-channel Configuration. VLAN to set when the interface is in access mode; valid values are from 1 to 4093, except for the VLANs reserved for internal switch use. The encapsulation dot1q command must be used going forward. Therefore, it is a futile attempt to configure something like "trunk encapsulation dot1q" as you indicated - because that is implicitly configured anyway. This is normal - just make sure that the Can you try the command "encapsulation dot1q 30"? 0 Helpful Reply. As you can see, I have a trunk ethernet port connected to a switch feeding my router with two VLANs (1 and 2). 1Q encapsulation for the subinterface. To enable IEEE 802. Subinterface-Ethernet Configuration Hi,Do you see "switchport mode trunk" command?If so, what you observe implies that ISL is not supported. Options. no encapsulation dot1Q vlan-id. 1Q (or dot1q) tunneling is pretty simplethe provider will put an 802. On older switches ISL was also supported so there was a command to configure. Then configure the subinterfaces with the correct encapsulation dot1q vlan_number command. no "mode" keyword. 1Q is the default encapsulation protocol for VLANs on all Cisco devices. This example shows how to configure the destination port for ingress traffic on VLAN 5 by using a security device that does not support encapsulation. Regards, Deepak Kumar . The undo encapsulation dot1q command disables a Layer 2 sub-interface from receiving packets with a specified 802. First, here is the trunking information for SW3. Syntax Description. 3560(config-if)# switchport mode trunk . no ip redirects. Skip to main content. The vlan vlan-id command is used to define VLANs for switched modules installed into your router. Dynamic Trunking Protocol (DTP) is not supported on private-VLAN ports or tunnel ports. 1Q encapsulation on a subinterface: switch I was getting ready to put the encapsulation dot1Q command into int gig 0/1 when my colleague told me that it was already working . The range is Precisely because of that. Virtual Private Network Command Reference for Cisco CRS Series Routers. 2 (25r)SEE1, and trying to configure a trunk for dot1q encapsulation. The encapsulation dot1q native command is not supported for subinterfaces on the Cisco Catalyst 9500X Series Switches. E Commands encapsulation dot1Q 12 Cisco Nexus 6000 Series NX-OS Layer 2 Interfaces Command Reference OL-27911-01 encapsulation dot1Q To enable IEEE 802. Open menu Open navigation Go to Reddit Home. The destination interface must be a physical port; it cannot be an EtherChannel, and it cannot be a VLAN. Precautions. Entering this command puts the device into service configuration mode (config-srv) where you configure all parameters that are common to an EVC. 23 MB) PDF - This Chapter (1. Examples The following example shows how to map ingress frames to a service instance: RP/0/ RSP0 /CPU0:router (config-if)# encapsulation dot1q second-dot1q 20 Related Commands The 'encapsulation dot1q X' command is required to associate traffic with a particular 802. , 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. 10 will belong to VLAN 10 and Fa0/0. 1Q Encapsulation; How to configure a trunk between switches; How to change the Native VLAN; Voice VLAN; Cisco DTP (Dynamic Trunking Protocol) Negotiation; At the entry of the switch port wich is assigned to a vlan with the " switchport acces " command; Or when it lives the switch on the trunk port command; thks in advance. No matching criteria are defined. Use the encapsulation dot1q vlan_id command in subinterface configuration mode to enable 802. One important command isencapsulation dot1Q. do you need the encapsulation dot1q 10 native command ? Im studying for the CCNA and I am confused. Command Modes Tuhin, Jon tried to explain that the 4948 switch has no switchport trunk encapsulation command because the only encapsulation it supports is IEEE 802. If you are using an earlier version of Cisco IOS, then you need to use 802. Are the dot1q tags locally significant to the interface, or are the following sub-interfaces both part of the same broadcast domain? They are locally Only one encapsulation command must be configured per service instance. Range 1 to 4094. #no negotiation #switchport mode trunk #switchport trunk allowed vlan add 300 #spanning-tree portfast #exit. Let’s check the routing table: no encapsulation dot1q <VLAN-ID> The no form of this command removes 802. Example: Router(config-subif)# end : Exits IP LAN switching commands: The encapsulation dot1q command is used to configure Q-in-Q termination on a subinterface. 06. Newer switches no longer support ISL, so there is only one encapsulation method available. switchport trunk encapsulation dot1q: This command is executed in interface configuration mode to specify that the trunk will use the IEEE 802. 1Q VLAN tagging (as opposed to Cisco's proprietary ISL). The dot1q native vlan command defines the default, or native VLAN, Encapsulation of the VLAN subinterface. 1Q encapsulation. This command has no keywords or arguments. This behavior can be achieved using the 1:1 VLAN translation command on the service instance attached to CPE1. I need to put switchport trunk encapsulation dot1q in int fas0/23 but "encapsulation" is not an option to enter. Cisco Nexus 9000 Series switches have the vlan dot1q tag native command that can be configured globally. end. " Command. Range is from 1 If you migrate from encapsulation list-extended command to encapsulation command, then no encapsulation list-extended command must precede the encapsulation command. The undo encapsulation dot1q vid 8021p command disables a Layer 2 sub-interface from receiving packets with a specified 802. I tought the command 'encapsulation dot1q <vlan>' would do it but the subinterface command list does not show it. 1X duplex Configure duplex operation. Replacevlan-id2 withanumberthat hi all,im trying to set up a lab im doing,ive got most of it configured but am having a problem entering the enc dot1q command,im using a 3620 router on ios c3620-i-m ver12. Why not? interface GigabitEthernet0/1 description Customer LAN no ip address encapsulation dot1q. Figure 19: Network diagram. no encapsulation dot1Q vlan-id Syntax Description. To disable encapsulation, use the no form of this command. 1. (To remove an interface, use the no form of this command. 3850#conf t Enter configuration commands, one per line. Note fa0/19, which is set to ISL. Both new vlans were communicating through a trunk (from the switch) but I did not need to do the command. dot1q is the default encapsulation type and the other type is isl. Here after is the Vlan configuration: interface FastEthernet0/0. 10 l2transport Router(config-subif)# encapsulation dot1q 10 To disable encapsulation, use the no form of this command. Example: Router(config-subif)# end : Exits subinterface configuration mode. My question is: 1. Chapter Title. The outer VLAN ID always has a specific value, while inner VLAN ID can no encapsulation dot1q <VLAN-ID> The no form of this command removes 802. Strange that it does allow us to create a subinterface but not assign an encapsulation. For this reason some switches don't even accept the command switchport trunk encapsulation with any parameter because there is no choice encapsulation dot1q. These keywords are valid only for local SPAN. Reenter the correct IP address information. The “encapsulation” command doesn’t exist in the IOS despite that cisco site says it does. ReneMolenaar The encapsulation dot1q command is used to configure Q-in-Q termination on a subinterface. crypto Encryption/Decryption commands dampening Enable event dampening default Set a command to its defaults delay Specify interface throughput delay description Interface specific description dot1q dot1q interface configuration commands dot1x Interface Config Commands for IEEE 802. 09 MB) View with Adobe Reader on a variety of devices encapsulation dot1Q 1 . Example: Router(config-subif)# encapsulation dot1q 101: Defines the encapsulation format as IEEE 802. The subinterface's encapsulation dot1q command is entirely sufficient. A VLAN created using the vlan vlan-id command is entirely independent from any VLAN on any routed subinterface. Command Mode. By default, no encapsulation type is specified on an EVC Layer 2 sub-interface. Router# configure Router(config)#interface HundredGigE 0/0/0/24. Command. " #VLANの作成とVLAN名の変更 (config)# vlan [vlan番号] (config-vlan)# name [vlan名] #accessポート設定 (config-if)# switchport mode access switchport access vlan [vlan番号] #trunkポート設定 (config-if)# switchport mode trunk switchport trunk encapsulation [ dot1q | isl ] ↑このコマンドが通らないときは、dot1qにしか対応していない可能性がある。 As shown in Figure 19, configure unambiguous Dot1q termination on subinterfaces of the device to implement intra-VLAN and inter-VLAN communications between hosts. 1Q tag. The evc-id or name is a text string from 1 to 100 bytes. This tags the native VLAN on the configured trunk ports. Currently, this is always 802. It is still available for backward-compatibility, but only for Layer 3 interfaces. encapsulation dot1q (Optional) Specifies that the destination interface accepts the source interface incoming packets with IEEE 802. I actually I will send the packet from Esxi which supports only dot1q not ISL The encapsulation dot1q vid 8021p command configures a Layer 2 sub-interface to receive packets with a specified 802. 2(18)SXE automatically replaces any use of the bridge-vlan command in previous QinQ configurations to the bridge-domain command. Note Executing encapsulation monopolizes the Ethernet frame and can cause MTU/fragmentation problems If your network is live, ensure that you understand the potential impact of any command. For interface-id, specify the destination port. Step 10. encapsulation dot1q already exists then you add another tagging. By ComputerNetworkingNotes Updated on 2024-09-29 ComputerNetworkingNotes CCNA Study Guide 802. 1Q encapsulation on a subinterface. Fa0/0. you can use show int gigabitEthernet 1/0/6 switchport to see default settings like encapsulation dot1q vlanid. The outer VLAN ID always has a specific value, while inner VLAN ID can either be a encapsulation dot1q. 1Q encapsulation on a subinterface: switch Command. show interface trunk Solved: Hi, I am trying to configure encapsulation dot1q but unable to do that in 3850 core switch. Step 4. Thanks. This is where you can choose between 802. The IEEE 802. 1Q or ISL encapsulation. The range is This command is executed in interface configuration mode to specify that the trunk will use the Cisco Inter-Switch Link (ISL) encapsulation protocol. 27 MB) PDF - This Chapter (1. Switch-1#sh int trunk Im studying for the CCNA and I am confused. 1q standard encapsulation protocol. To define the matching criteria to map untagged frames on an interface, use the encapsulation untagged command in the Interface configuration mode. To disable encapsulation, use the Configure trunk encapsulation as dot1q. 3. what happens when you don't use the command when using router on a stick. In your router interface configuration: interface GigabitEthernet0/1. Step 2. As when i see trunk info by using "sh int trunk" i get below details. For details on trunking, refer to Configuring VLANs . I'd appreciate any help with this. I noticed that the 4000 series no longer accept "encapsulation dot1Q xxx". Step 4: encapsulation dot1q vlan-id [native] Example: Device(config-subif)# encapsulation dot1q 201 native: Configures 802. If no Device (config)# monitor session 2 destination interface gigabitethernet1/0/2 encapsulation dot1q ingress dot1q vlan 5. 1 255. Switch-1(config-if)#no shut Switch-1(config)# no cdp enable. 3850 (config)#int gi2/0/1 3850 (config-if)#swi 3850 (config-if)#switchport Use the vlan dot1q tag native global configuration command to configure the edge devices so that all packets going out an IEEE 802. 255. The encapsulation dot1Q 1 native command was added in Cisco IOS version 12. "Satisfaction does not come from knowing the solution, it comes from knowing why. 03E. encapsulation untagged. no ip address. Use the encapsulation dot1q command in subinterface range configuration mode to apply a VLAN ID to the subinterface. The command accepts an Outer VLAN ID and one or more Inner VLAN IDs. NOTE: The encapsulation VLAN ID should be unique within an L3 LAG subinterface. The native keyword option is only appended to set the native VLAN to something other than VLAN 1. encapsulation dot1q. You do not create VLANs for routed subinterfaces should you be using any - you simply create the subinterface and refer to the corresponding VLAN by the usual encapsulation dot1q vlan-id command. ; Each subinterface configuration lists two subcommands. no ip unreachables I think the only supported protocol is dot1q so there's no need to specify. You can use the "no" form of the command to remove the trunk configuation. 20 to VLAN 20. SW1(config-if)#switchport trunk encapsulation dot1q SW2(config-if)#switchport trunk encapsulation dot1q. dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: On Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 1 I see on my 3560 switch I'm able to use dot1q encapsulation, but can't seem to find the command on the 2960. The range is Hi all, The following simple configuration run flawlessly on my C1111-8P and IOS XE 16. Q-in-Q is No same but similar. Issue the command "sh interface 5/1 switchport" or "sh interface 5/12 capa" to see. Simple commands to remove port trunk on a Cisco switch port Step 1: Enter the following commands and don’t forget to hit ENTER after each line of code conf t interface (interface number) ~ example: interface gigabitethernet0/24 switchport mode access no switchport trunk encapsulation dot1q end Router(config-subif)# encapsulation dot1q 101: Defines the encapsulation format as IEEE 802. 1(x) Chapter Title. 1Q and associate one specific VLAN with the subinterface. But it seems there is no command to do that. 1Q (dot1q), and specifies the VLAN identifier Step 5: end. Description <VLAN-ID> Specifies encapsulation VLAN ID. In that case, configuring the physical interface no longer makes sense, and all configuration can be done on subinterfaces. I noticed that I cannot set the encapsulation to dot1q even though I have configured the port as a trunk. subint command in global configuration mode to create a unique subinterface for each VLAN that needs to be routed. By default, our switch will negotiate about the trunk encapsulation type. 1Q encapsulation on a subinterface: switch Use Glen's commands although as he says I don't believe you need the "switchport trunk encapsulation dot1q" command because the switch only supports that so it isn't an option. Parameter. Switch(config-if)#switchport mode trunk Switch(config Some switch models require the command "switchport trunk encapsulation dot1q" to be set on a port prior to enabling the port as "switchport mode trunk". 1Q encapsulation of traffic on the subinterface. 40. Syntax. 1Q encapsulation on a subinterface: switch The encapsulation dot1q native command is not supported for subinterfaces on the Cisco Catalyst 9500X Series Switches. Exam with this question: CCNA 2 v7 Checkpoint Exam: Switching Concepts, VLANs, and Inter-VLAN Routing Exam Answers Book Title. The Egress Service instance on Remote UPE device should be service instance 50 ethernet encapsulation dot1q 10 second-dot1q 20 rewrite ingress tag translate 2-to-1 dot1q 500 symmetric bridge-domain 50 (To remove an interface, use the no form of this command. You need to configure "switchport mode access" to change it from trunk to access mode. The no encapsulation dot1q vlan and default encapsulation dot1q vlan commands restore the default VLAN to the configuration mode interface by removing the corresponding encapsulation dot1q vlan command from running-config. If I put an IP address to Gig1 or use the "encapsulation dot1q 100 native" command on the subinterfaces it is working. command. So I do the command 'switchport' to set it to a switchport first. Thanks in advance for your help . 1Q VLAN interfaces. Example. A dot1q VLAN subinterface is a virtual Cisco IOS interface that is associated with a encapsulation dot1q. 1Q encapsulation on a subinterface: switch Device (config)# monitor session 2 destination interface gigabitethernet1/0/2 encapsulation dot1q ingress dot1q vlan 5. encapsulation dot1Q 633 . However this command "Switch-1(config-if)#switchport trunk encapsulation dot1q" is not working/invalid on this switch. The range is The encapsulation command is used for trunking ports and trunking ports are configured to connect to other infrastrucutre devices (switches, routers,etc). PDF - Complete Book (3. Information About Layer 3 Subinterfaces. 1Q by using the switchport trunk encapsulation command. The ethernet line card is another factor. I googled this problem and saw that lots of other people seem to have the same or similar problems when it comes to dot1q tagging with the CSR1000v series. 1Q specification establishes a standard method for tagging Ethernet frames with VLAN membership information, and defines the operation of VLAN bridges that permit the definition, operation, and administration of VLAN "The "encapsulation dot1Q 1 native" command was added in Cisco IOS version 12. Cisco Nexus 9000 Series NX-OS Command Reference (Configuration Commands), Release 10. Enables dot1q trunking encapsulation on the interface. I suspect that it has to do with the native VLAN tagging, but this will quickly prove if I'm barking up the wrong tree. I haven't had to use this command on routers recently, but I recall having to use it in the past on some 3825 and similar models. Cisco IOS Release 12. I just downloaded and verified your IOS a few mins ago from the Cisco Site. ingress If you migrate from encapsulation list-extended command to encapsulation command, then no encapsulation list-extended command must precede the encapsulation command. Encapsulation Dot1Q. Level 1 In response to Leo Laohoo. Without the encapsulation command , I assume that we cannot assign an Ip address , hence the only solution is to change the Step 1. Usage. C3750-1#sh version Configuring 802. Device(config)# interface gigabitethernet1/0/1 Device(config-if)# switchport trunk encapsulation dot1q Device(config-if)# switchport mode trunk Device(config-if) The following table describes the commands used to For session_number, specify the session number entered in step 4. no switchport trunk I have a 2960 running IOS 12. So in your IOS-XR example above, traffic entering the physical Bundle-Ether10 interface with an 802. Solved: Hi, I have a Cisco 3650 running software version 03. encapsulationdot1qsecond-dot1q TodefinethematchingcriteriatomapQ-in-Qingressframesonaninterfacetotheappropriateserviceinstance, usetheencapsulation dot1q second-dot1q No. 1Q VLAN ID with a subinterface. I've got a Cisco Catalyst 3750 and i've wanted to create a subinterface and add it to a vlan for a test. Command Default. Rangeisfrom1to4094(0and4095arereserved). 5(x) Chapter Title. Examples Configuring 802. Specify the host (NMS) that receives the traps by using the snmp-server host global configuration command. I saw there can use the command to set the trunk mode: SW(config-if)# switch trunk encapsulation ? dot1q isl negotiate but I tried bellow command did not found the command. 1Q (QinQ) Use the no encapsulation dot1q com-mand to return to the default encapsulation (ARPA). That would be the parameter to specify IEEE 802. Hope this helps. 802. and preservation of all VLAN tags on pure transit boxes in the SP cloud that have no Q-in-Q encapsulation or decapsulation requirement, (To remove an interface, use the no form of this command. The switchport mode access command is used on ports that Replacing a 2900XL with a new 2960 and need to copy over some configs. To add a VLAN ID to an ATM permanent virtual circuit (PVC) over an ATM xDSL link or a PVC configured using Route-Bridge Encapsulation (RBE), use the bridge-dot1q encap command in ATM PVC Hello, In the router subinterface mode, we can link the VLAN ID to this interface as well as assign it an ip address and a subnet mask. After you run the encapsulation command in a Layer 2 sub-interface view to configure the encapsulation mode, the sub-interface can forward only specified types of packets. 1Q VLAN Interfaces. Applies a unique VLAN ID to each subinterface within the range. description VERS CLIENT-PACKET VLAN. Syntax Description Hello Chandru, If the command switchport trunk encapsulation is not available then the switch does not support various encapsulation methods, and hence, there is nothing to configure about the encapsulation. Part 2: Implement the Solutions. This module describes the configuration and management of 802. Here is a config that I have working elsewhere. switchport trunk encapsulation dot1q !--- Enable trunking on the interface. Outer VLAN. End with CNTL/Z. Cisco switches have traditionally supported two encapsulation methods for trunks: ISL and dot1q. (Optional)IdentifiesthehostVLANofaQ-in-QVLANpair. Does the 2960 support dot1q? Is that what I'm missing here, is that why the vlans are not being propagated to the dell switch? I have both ports on either end of uplink configured as trunk ports, vlan 1 is passing fine, just no others. A dot1q VLAN subinterface is a virtual Cisco IOS interface that is associated with a If you’re moving from any old commands like, encapsulation dot1q, or encapsulation dot1q priority-tagged, or encapsulation default, or from any other old commands, to the encapsulation list-extended command, then no encapsulation command should precede the encapsulation list-extended command as shown in the following example. So I have to do the command 'switchport trunk encapsulation dot1q', then finally it works. Step 3. Configure the no switchport, no keepalive, and no ip address commands before configuring Xconnect on the attachment circuit. Hello Shane, some low end switches support only ISL and others support only 802. Each subinterface is then configured with the following two commands: encapsulation dot1q vlan_id [native]: This command configures the subinterface to respond to 802. interface GigabitEthernet0/20 description description connection to VM vswitch switchport trunk encapsulation dot1q switchport trunk native vlan 999 switchport trunk allowed vlan 555 The native vlan does carry untagged information, like DTP updates, so that's why you would make sure you have a native vlan that is separate from the vlan you do want tagged. Here, You have configured VLAN ID 633. We have replave a 3620 router by a 3725, but the configuration of the vlan doesn't work on the 3725 because it doesn't accept the encapsulation command following: - encap dot1Q 1 - encap ISL. 1Q configuration for Cisco IOS Versions Earlier than 12. ) What are the specific ramifications that occur (if any) of leaving "switchport trunk encapsulation dot1q" configured on a switc And you do that command and it says no, no, no, you’ve got to choose an encapsulation before it is forceful in the configuration. Implement your recommended solutions. Cisco Layer 3 Switch! Enable Layer 3 routing Layer3-Switch(config) # ip routing! The command “no switchport” configures the specific interface as a Layer 3 routed interface. 1Q trunk, including the native VLAN, are tagged. I have then attempted to add vlans as follows: Verify that both switches have the trunk configured on the same port Gi0/52 and that the switchport trunk encapsulation dot1q command is supported and used on both sides. vlan-id. The switch does not support Layer 3 trunks; you cannot configure subinterfaces or use the encapsulation keyword on Layer 3 interfaces. I can only enter allowed, native, or pruning. Regards, ML The dot1q vlan command is replaced by the encapsulation dot1q command on the Cisco ASR 9000 Series Router. So we will say, switchport trunk encapsulation, choose dot1q, that is it would be dot1q. 633. encapsulation dot1q <VLAN-ID> no encapsulation dot1q <VLAN-ID> Description The no form of this command removes 802. The encapsulation list-extended dot1q command supports only comma-separated list of outer and inner VLAN tags or VLAN ranges along with untagged Ethernet frames (no I am trying to configure a 4507 R chassis with Dual SUP but i cannot see teh switchpot mode trunk encapsulation dot1q? The supervisor card isn't the only factor if the commend "switchport encap dot1q" is supported or not. encapsulation dot1Q vlan-id no encapsulation dot1Q vlan-id Syntax Description Command Default No encapsulation Command Modes Subinterface configuration mode Command History Usage Guidelines IEEE 802. encapsulation dot1q vlan-id [native] Example: Device(config-subif)# encapsulation dot1q 201 native: Configures 802. Use. 1Q encapsulation on a subinterface: switch The encapsulation options are ignored with the no form of the command. 168. Only if you have both ISL and dot1q you will see "switchport trunk encapsulation" command. I wasn't successful in finding any So absolute basic connectivity - but I can not ping the routers like this. 1Q tag on all the frames that it receives from a customer with a unique VLAN tag. 3. There is no way for our router to know which VLAN belongs to which sub-interface, so we have to use this command. It takes the following statements: switchport trunk allowed vlan 100 switchport mode trunk switchport nonegotiate I'm not sure why I can't change the encapsulation. ConfiguringLayer3Subinterfaces Thismoduledescribeshowtoconfigurethedot1qVLANsubinterfacesonaLayer3interface,whichforwards Prior to this release, if you have a single VLAN ID configured using the command encapsulation dot1q 1 to define the matching criteria on a subinterface, then it only matches single tagged packets with VLAN ID as 1 and double tagged packets with outer VLAN ID as 1. On the switch, if you have a native VLAN other than VLAN1, on the router, configure the same VLAN to be the native VLAN. Interface-Ethernet Configuration. And both of my VLANS are bridged on two separate The encapsulation dot1q native command is not supported for subinterfaces on the Cisco Catalyst 9500X Series Switches. 2. switchport mode access. If you are configuring these ports for APs the worst that can happen is that it just doesn't work (connecting to other switches is different). Layer2-Switch(config-if)# switchport trunk encapsulation dot1q Layer2-Switch(config-if)# switchport mode trunk Layer2-Switch(config-if)# exit. VLAN ID currently assigned to the subinterface. Then I do the command 'switchport mode trunk' but receive the error: "Command rejected: An interface whose trunk encapsulation is "Auto" can not be configured to "trunk" mode". Sets encapsulation mode of packets allowed to pass a Layer 2 sub-interface to Dot1q. no encapsulation dot1q <VLAN-ID> The no form of this command removes 802. bfyh ipliym ojn metffp zjur mxnyvf stjtvdh yhhp xgbhmu vgs

No encapsulation dot1q command. Refer to the exhibit.