Questions tagged [trunk]

For questions about trunks, layer-2 links across which traffic for multiple VLANs travel.

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router on a stick and VRRP on the same router and full redundancy possible?

The routers on a stick are running VRRP on g0/0.10, g0/0.20 and g0/0.30. On switches, ports fa0/1-8 are on VLAN 10, fa0/23 and fa0/24 are configured as trunk port, with allowed VLANs 10, 20 and 30. ...
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1answer
1k views

Mikrotik - Cisco requests not working properly

We've got a problem with our WiFi company network. We bought a Cisco Switch and Wireless LAN Controller (Cisco 2500 WLC) plus eight Access Point (Aironet 2700) to offer clients seamless roaming ...
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1answer
895 views

Alcatel Lucent with Cisco Router

I have an Alcatel Lucent OS6450 and a Cisco 1812 Router. I need to trunk two VLANS to the Switch. VLAN 210, 300. VLAN 210 should be native VLAN. They all should be trunked to Interface 1/1 and then ...
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2answers
3k views

SG300 - no traffic across trunk

This one's got me banging my head against a wall... likely a simple answer, but I've tried everything I know. I heard the internet's a smart place. :) Have an SG300-28MPP connected to a clients' ...
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3answers
3k views

Operational mode is down for one link

I am setting up a simulated Cisco Packet Tracer with three Cisco Catalyst 2960 switches S1, S2 and S3. S1 being the trunk for S2 and S3. I have three(3) interfaces F0/6, F0/11, F0/18 that are ...
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2answers
10k views

How to configure native vlan on D-Links switches

My infrastructure contains exclusively D-Link switches, I wonder if there is a way to configure native vlan on trunk ports? I need to configure native on DGS-3100 48
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1answer
2k views

VLans Cisco Packet tracer

I have two vlans configured through a multilayer switch and one router with DHCP service. I configured trunk and access ports as shown in the image below. I need to block traffic between vlan's. ....
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2answers
503 views

Swap VLAN by changing IP address of a device

We expect that there is a switch, configured with three VLANs on one port (Trunk). VLAN10 -> 10.0.1.0/24 VLAN20 -> 10.0.2.0/24 VLAN30 -> 10.0.3.0/24 A unmanaged switch is connected to ...
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5answers
1k views

Are there any security advantages to activating VLAN tagging?

I understand the concepts of generating a VLAN. However, on a small, closed, sophisticated network, are there any security advantages to activating VLAN tagging?
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2answers
456 views

VLAN tagging between Linux and Cisco Small Business switches: fluke, bug or am I missing something?

I seem to be having trouble with communications between a Ubuntu 16.04 VM and Cisco SG-300 10 port switch. I feel like there is something obvious I MUST be missing but for the life of me I cannot ...
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1answer
769 views

VTP not working in all switches

In server: C3650-48TS, 03.03.05SE SW01#sh vtp sta VTP Version capable : 1 to 3 VTP version running : 1 VTP Domain Name : TEST VTP Pruning Mode : ...
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1answer
103 views

How can I create a multi-gigabit link between these switches?

I have a server rack with an HP 2810-24G in it, and a data cabinet with an HP 1800-24G. All the clients connect with gigabit to the 1800-24G, and all the servers are connected with gigabit to the ...
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2answers
3k views

VTP and VTP domain

Does a VTP server switch, with a VTP domain configured on it, advertise the VTP domain name to a client switch, so that the VTP domain is automatically configured on client switch?
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4answers
1k views

How can i access three vlans on one port?

I have VLAN 11,12,13. i need to use these vlans to L2 switch port( call it as port 3). 11 for printer, 12 for PC(dhcp from server), 30 for cisco phone. Connected as from port to Cisco IP Phone, then ...
4
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1answer
2k views

What happens with tagged traffic on access port of Cisco switch?

I am broading up more this unanswered question: VLAN tagging and access port Let's assume I am trying to accomplish Double Tagging Attack. From my understanding, prerequisites of this attack is to be ...
3
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1answer
800 views

Cisco Router with Dell Switch VLAN Configuration

My Plan (Short Version) Actually we have three access points directly connected to our router. I want all of them to connect to a switch and from there only one cable to the router. The Hardware: ...
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2answers
1k views

Netgear SFP and trunking between three switches

Can you use SFP stacking with trunking? We have two Prosafe S3300-28x switches stacked using two SFP cables. These switches also have two 10Gig ports, which we would like to connect to a separate ...
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2answers
3k views

What is native vlan tagging?

I researched a lot of native VLAN tagging resources, but I still don't understand what is the difference with VLAN tagging. Can anyone explain it simply?
3
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1answer
1k views

TCI ( Tag control information ) use VLAN

I have simple VLAN network diagram . I want to show how the TCI field can be used to have a VLAN number policy for this diagram. How do I do this?
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1answer
1k views

How do 2 trunk ports communicate with each other?

Scenario: switch 1 has hosts of vlan 20 and 30 only switch 2 has hosts of vlan 30 only Neither of the switches are connected to any other switches My questions: Why would we need to filter vlan 20 ...
2
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4answers
782 views

Trunk link between Cisco switches does not allow internet to the end users

I have a issue in my network. In terms of OSI I am OK in the physical layer. My link is OK because I tested connecting a computer on a fiber link, and I was able to surf the Internet, but when I make ...
2
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1answer
149 views

Behavior about 802.1D with ISL

Reading this quote, The 802.1Q standard defines one unique Spanning Tree instance to be used by all VLANs in the network. STP runs on the Native VLAN so that it can communicate with both 802.1Q and ...
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2answers
3k views

VLAN, Trunk and OSPF

So I have this problem in trunking that the outside hosts cant ping one another. Here is my configuration please help me and what network should I put in my OSPF? VLAN Number - Port assignment 10 - ...
2
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1answer
293 views

HP V1910 - Why is tagged traffic going to VLAN1?

HP(3Com) V1910 switch with 2 vlans: VLAN1 (native) and VLAN191 The Trunk Port is configured like this: Why are frames tagged for '191' also being forwarded to VLAN1? Any ideas. Thanks
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1answer
2k views

Setting up a new Meraki MS220-48FP Switch to replace a pre-existing DellForce10 Switch

I have a new Cisco Meraki Switch that is replacing a DellForce10 switch that is already in place. I need to configure the Meraki switch to how the Dell switch is setup. The only thing that is ...
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3answers
2k views

Extending VLANs to other switches

I am working in an inherited environment where I have basically been thrown in feet first. I'm also brand new to VLANs, and only set it up via documentation from other techs in my company. After ...
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2answers
189 views

No ping between Nokia (IPSO) and Cisco switch through trunk link

I have a Nokia and a Cisco switch, connected with one RJ cable. I've configured the switch in trunk mode, and the port on the Nokia with some VLAN number. I don't have a ping between them, I don't ...
5
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2answers
2k views

Juniper trunking with two links (not using LAG)

Some reason I'm drawing a blank on this. Let's say I have two EX switches connected together with 2 links to each other (xe-0/1/0 and xe-0/1/1 on both switches). I can easily setup a trunk on one of ...
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3answers
349 views

Confusion over VLAN tagging

My question is, if I have a Cisco switch with a particular port kept in default VLAN 1 and the native VLAN of the trunk port is changed to 2. When a frame arrives at the trunk port from that port it ...
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2answers
2k views

How do I remove a vlan from a trunked port

I had a question about a vlan I accidentally added a port to. I have a cisco 2960x 48 port switch. I entered the incorrect port and added it to our wireless vlan. The port is a trunked port to my ...
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1answer
268 views

DTP mode desirable and on

the on mode still negotiable (send/receive DTP) until i set it no negotiate so what is the Difference between on and Desirable. please give an example :))
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2answers
1k views

VTP: VLAN is not propagating

This Topology is simple but my VLAN is not propaganting. I'm following this Tutorial Multilayer Switch0 VTP Version : 2 Configuration Revision : 2 Maximum VLANs ...
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1answer
85 views

Routing between several nets

I have 4 IDFs(cisco 3560) and one MDF(cisco 3560). IDFs are connected via fa0/24 to MDF. Every fa0/24 is in mode trunk. Look at the picture Fa0/1-4 on MDF is in mode trunk. Problem : I cannot ...
2
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3answers
8k views

Tagged vs Untagged Question [duplicate]

Since I'm a noob, I'm unable to post a follow up question on the following question... Why and how are Ethernet Vlans tagged? In my image, I believe I have correctly depicted how tagged networking ...
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1answer
2k views

What VLAN to set as trunk's native VLAN

I have 4 VLANs set up for our network. VLAN 50 for Servers / Firewall, VLAN 100 for Workstations, VLAN 150 for VOIP, and VLAN 200 for WiFi. What is the best practice for setting the trunk links VLAN ...
4
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2answers
431 views

Neighbor switch's port doesn't change to access mode

When Switch A's port is configured to access mode from trunk mode, Switch B's port stays in trunk mode. Switch A is DTP disabled (#switchport nonegotiate). Switch B has default configuration which ...
3
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1answer
3k views

VLAN routing using Cisco 2950 Switch and Cisco 1841 Router

I am new to networking and I have recently purchased a 1950 switch and 1841 router. What I am trying to do, is to use VLANS to segregate my network. From whaty I have read I think I need to ...
1
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1answer
198 views

IPV6 Neighbor Advertisement (NA) not recieved

I'm trying to make a project to detect NAs in an inter-vlan IPv6 environment via trunk line. I know that NAs are sent in multicast so it would be possible to see the NA messages using a trunk line. ...
2
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2answers
181 views

Addressing between routers - vlans

I am a little confused with assigning ip to computers. I have a topology like this : Should all segments between Router 9 and Router 10 be on the same subnet ? I should be able to communicate ...
2
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2answers
812 views

inter vlan , sub interfaces

I have a big problem with configuring inter vlan. I have a topology like this : I don't have routing configured. I want to ping from Router 3 (VLAN 10) , a router 4 (VLAN 20). I know that I have to ...
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2answers
7k views

Why only one amber light between two switches

I have two Cisco 2950C switches with two trunk port connections between them. On one line the lights are green on both ends. On the other, the light turned amber only on one end (green on the other). ...
3
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1answer
929 views

Distributed Trunking With core and Access Swtiches?

Is it possible to set up a Distributed Trunk with 2 Core an 1 Acces Switch on HP 5406zl? I know that you can connect two switches with an interswitchconnect port. That would be the 2 core switches. ...
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2answers
2k views

VLAN Tagging on Trunk Port

A normal (untagged) broadcast packet is sent into a trunk port on a switch, the vlans it accepts are 11, 12, and 13. What will happen to that packet? Will it be sent out all access ports with vlan 11 ...
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2answers
3k views

Uplink ports in trunk mode or aggregate link?

Question: To setup uplink ports from network switch in trunk mode vs putting them in a port-channel? We use Dell N series and PowerConnect switches in our agency. We are installing a new rack for our ...
3
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2answers
438 views

Trunking MGMT Vlan Cisco x Dell

@edit: SOLVED!!! - See my answer below! how's going? Scenario: Trunk two Switches (Dell 6224 and Cisco SF300) for accessing them from the MGMT VLAN. Cisco ge2 -------TRUNK-------> Dell 1/g22 ...
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1answer
470 views

How to add Giga and SFP ports as LACP trunk members [closed]

I want to add 1000M and SFP TX ports as LACP trunk members but am unable to so because the selection is only for ports 1-24. Is there a way to overcome this? I have a TP-Link TL-SL2428WEB switch.
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1answer
598 views

Cisco ME3x00 - QoS for layer 2 trunks

I have some ME3800's running 15.3(3)S which aggregate layer 2 circuits from customers. They all have a similar configuration of an incoming trunk on Gi0/1 and then Gi0/23 & Gi0/24 are layer 3 p-t-...
5
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1answer
5k views

Native VLAN on Trunk port of Zyxel GS1910

If I have a configuration on a Cisco switch; int Gi 0/48 switchport mode trunk switchport trunk native vlan 100 switchport trunk allowed vlan 101-110 Configuration on a Zyxel Switch ...
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4answers
52k views

Switchport mode access VLAN & switchport mode trunk on one interface

Googling around to see if this setup on one port is correct (it doesn't look right to me), I'm not really seeing a straightforward answer. There is an interface with the following configuration: ! ...
2
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1answer
460 views

VLAN links for IP Cameras

I currently have fiber vlan trunks between all of our buildings. We are adding another ip camera server and am looking to segregate traffic. I am thinking of dedicating a fiber link and putting it on ...