Questions tagged [trunk]

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

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426 views

Trunk on the outside ASA interface

I have a topology as in the picture. It is designed to be a factory network. 2 ASAs in a failover cluster border the whole LAN. And it is pretty much clear how to configure them: outside interface to ...
5
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2answers
4k views

The best way to understand Vlans?

Every time i try reading about the configuration of a device and adding it to the network, i always face a problem. The problem is basically am not able to understand Vlan's, and how for example some ...
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0answers
659 views

Configure pfSense VLAN Trunk

I have setup a pfSense box as a transparent firewall between my Cisco router and first Cisco switch: CISCO ROUTER - 10.10.1.253 ↓ PFSENSE - OPT1 BRIDGE - 10.10.1.252 ↓ CISCO CORE SWITCH - 10.10.1.250 ...
5
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2answers
2k views

How far is VLAN broadcast propagated?

I'm not 100% sure of the vocabulary, so please bear with me. Suppose I've set up some new VLANs to better divide my network logically. I have a 4507 as a core network switch with VLANs 1 and 10-19. ...
1
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1answer
137 views

VLAN creation with trunk port configuration

I have three switches and I configured VLAN with trunk on those switches but my requirement is VLAN 1, VLAN 2, VLAN 3 has to be configured on Switch 1 and Switch 3, but I don't need VLAN 2 ...
3
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1answer
904 views

ACL on trunk Port

our network infrastructure as showing the image below I had to give an external company (dealing with Face recognition) software an access to both the server (172.26.33.56) and the IP Camera (172.26....
2
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1answer
81 views

Trunk method on cisco switch

I knew about trunk concept but I don't know about connecting cables method. If we have 8 switches to connect trunk cables across those 8 switches, any methods or rules?
3
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2answers
460 views

Trunking across different switch makes

I have a Dell N3132PX running 6 different VLANs. (192.xxx.xxx.10) VLAN 2 is my management VLAN for my switches. VLAN 3 is my DHCP network running production level for users. Port 25 (Untagged) VLAN ...
2
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3answers
2k views

Native VLAN question

Regarding the Native VLAN role (example, VLAN 1 by default for Cisco), we often can read that: The untagged frames arriving on a trunk port, are "put" in the Native VLAN The untagged frames arriving ...
1
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1answer
286 views

10Gbe Network Setup, Freenas Backup and File Sharing

I have a small office network that has: ISP: 100Mbps up / 100Mbps down Firebox M200 (Firewall/Router) 8 x 1Gbe ports / 3.2Gbps Firewall throughput Cisco SG200 1Gbe Switch / 26 port *Planned 10Gbe ...
3
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1answer
875 views

Setting a loopback/management address through a layer 2 trunk

We have two EX4200 switches in the following configuration: Router (.1)=====static route=====(.2) EX_01========trunk========EX_02 I want to configure a loopback or management interface on EX_02. ...
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1answer
55 views

Need clarification on some Cisco configurations

Here is the situation : I have an HP server with 2 network interfaces linked to a Cisco switch. I want to configure the switch to accept the NIC teaming of the server. I have always believed that the ...
5
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1answer
2k views

Cisco iOS SNMP OID for Vlan on Port

I am working on setting up SNMP monitoring for our internal switched network in Zabbix. I have everything working now, but the template I am using discovers all ports on the switch, and I really only ...
1
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2answers
2k views

Can default vlan 1 traffic goes to native vlan 2?

I have 2 switches running on 802.1Q trunking mode. On both switches the default vlan is 1. If I were to configure the native vlan to 2, can vlan 1 traffic still travel from switch to switch? After I ...
1
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1answer
778 views

Not able to get a trunk between router and distribution switch to succeed

I couldn't get a successful ping from the router to the distribution switch Distribution Switch Dist_Switch#sh ru Dist_Switch#sh running-config Building configuration... ...
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2answers
496 views

Feeling lost troubleshooting Trunk and STP configurations on Packet Tracer

I couldn't identify the mistake or what I have missing in the configuration on this network, if anyone of you is welling to check it out this is the link PacketTracerFile I could not ping from any PC ...
0
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1answer
482 views

L2 transparent firewall between router and switch running 802.1Q trunk mode [closed]

Router port facing to Core switch is running trunk mode allowed vlan 200 & 300. I am placing a firewall between the trunk connection. Can I set the firewall as L2 transparent mode or I need to ...
4
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2answers
572 views

VLAN Tags Being Different for a VoIP Phone vs. the Host Daisy-Chained to it?

I've recently began working for a VoIP Provider and I am constantly seeing VoIP Phones pulling different VLANs than the Host that is connected to it i.e. daisy-chained. When I've tried to look more ...
3
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3answers
671 views

Force VLAN traffic through specified interfaces

I have two VLANs, VLAN1 for "clients" and VLAN2 for (web)servers. Both VLANs have two ports in etherchannel (one Cisco switch). I would like to put transparent (WAF) device in bridge mode between the ...
1
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1answer
147 views

VLAN configuration help

I am lost on this, and I could use a bit of help. I have one PC that I want to isolate on my network on its own VLAN. Here is a rundown of my equipment: Netgear GS752TP Switch Cisco RV120w Router ...
1
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1answer
665 views

Help with Native Vlan mismatch error

I'm pretty new to networking. I'm working on creating some vlans, assigning them some ports, and then trying to configure one of those vlans as the native vlan. here's what I have done. Switch(config)...
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1answer
69 views

Bridge traffic forwarding in vlans

on a trunk, switch A having, say vlan 10 allowed and the other switch B does not. Switch B doesn't even know about that vlan. How does switch A behave in forwarding broadcasts in vlan 10? Will frames ...
1
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3answers
3k views

Connecting two switches with an access mode port

I manage a switch, and I saw that on one interface there were 19 different MAC addresses, all of them on the same VLAN, so I guessed that there was a switch connected to that interface. Since all MAC ...
1
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1answer
50 views

Create a trunk to a device with two NICs but one MAC address

I have a Linux device with two NICs, but they seem to share one MAC address. I want to configure a redundant network connection to a switch stack. Whenever I restart the end device, it is shutting ...
2
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1answer
365 views

Switchport negotiation between trunk and dynamic desirable

If two switches are connected, one with switchport mode trunk and the other with switchport mode dynamic desirable, will both switches form an operational trunk?
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2answers
764 views

Why is my inter vlan trunk routing not working?

I'm using packet tracer. I have the following configuration : On switch 2950-24 VLAN 99 . interface assigned to it is fa 0/1 PC 1 has ip 10.10.10.2 with default gateway 10.10.10.3. PC 1 is ...
3
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2answers
23k views

What is difference between standard VLAN extended VLAN?

I know that the range of standard VLAN is 1-1005 and in extended VLAN the range is 1-4094. But is just range is the difference?
4
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2answers
376 views

necessary and sufficient condition for vlans to communicate together

Let's say I know my switches configurations, for each, I know what port are configured in access, what port are in trunk, and what vlan is on a port. For each device. I want to group vlan that can ...
1
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1answer
1k views

Will DTP always use the native VLAN or always VLAN 1?

I'm having trouble understanding whether DTP will always use the native VLAN, even if it's configured to be non-default, or if it will use VLAN 1 in any case. For example, if you configured VLAN 50 to ...
2
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2answers
101 views

What happend when you set a trunk against an Access

I'm wondering what would happen in my network in the following configuration: on switch1 -> interface1 in mode access, vlan4 on switch2 -> interfaceA in mode trunk, vlan4 and vlan8 switch1 is ...
1
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1answer
2k views

Is DTP enabled by default on the newest Cisco devices?

Is DTP (Dynamic Trunking Protocol) enabled by default on the newest Cisco devices? I have been using Cisco 2960 switches and DTP is enabled by default. I was wondering if this was the same for the ...
2
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3answers
4k views

Best practice for connecting router to switch? (re: VLANs and multiple ports)

When using multiple VLANs, what is the best practice for connecting a router to a switch? For example, I can use one single port (and one cable) between the switch and router and set it up as a VLAN ...
2
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2answers
10k views

What is the purpose of a trunk port in a network switch? [closed]

I have recently taken over responsibility of the management of the switches in my apartment complex. We two switches, 1 and 2, the fiber connection to the internet is connected to switch 1. Switch 2 ...
3
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3answers
6k views

Aren't Switch Access ports tagged?

I've read where frames are tagged only when going over a trunk and that Access ports do not tag frames. But don't Access ports actually tag frames? When I configure a particular port to be in a ...
1
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1answer
2k views

QinQ and selective QinQ

What is difference between QinQ and selective QinQ ? We need to configure selective QinQ VLAN trunk between our setup. Please help in selective QinQ .
7
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3answers
706 views

New VLAN across multiple Cisco switches

I have setup a new VLAN on my corporate network for use for guests only. I am trying to setup a guest WiFi service and keep all of the traffic separate from the business traffic. So far I have ...
2
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2answers
318 views

Increasing output drops on a 2960 switch

Total output drops are still increasing on a Cisco 2960 switch trunk interface that is connected to ASA interface. What causes these drops?
2
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1answer
233 views

Should we trunk between L2 AS switches? Or send everything to the L3 DS?

Given the diagram below, does it make sense to trunk between the L2 access switches? Otherwise, all VLAN 10 and VLAN 20 broadcast domain traffic has to go through the L3 distribution switch. Thick ...
3
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1answer
139 views

Should the gateway for devices on a VLAN be set to the L3 switch they are connected to? Or just one switch?

Given: A typical collapsed core design where there are X number of L3 access switches connected to one L3 distribution switch. VLAN trunking is enabled between the various AS and the DS. A router ...
7
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4answers
429 views

Building too large for ethernet runs

I'm pretty new to network design. I know enough to wire small buildings and such, but I'm puzzled as to how work this one out. A building I'm working on is an odd shape, and very large. ...
2
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1answer
770 views

Is it possible to run PPPoE and dot1Q protocol simultaneously on a cisco router?

So here's a problem I need to solve and I am having issues researching for an answer. I have an optical cable that's coming in through SFP and it is forced to be connected to a switch before going to ...
5
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2answers
5k views

How to encapsulate all VLAN traffic inside VXLAN

As I understand VXLAN, it looks like it should be able to encapsulate and properly route VLAN-tagged traffic. However, in investigating how to actually configure VXLAN on network devices, it looks ...
1
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4answers
2k views

Trunking between switches

I am having trouble configuring trunking on these switches. I am unsure how to configure different VLANs on different switches, each connected to one another. I tried to configure the 802.1Q trunk on ...
0
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2answers
183 views

Separate Subnet for Each Vlan? [duplicate]

Thoughts and Query I was tring to understand Inter-vlan routing and realised, that each exsisting vlan in the switch is configured with a different subnet. Is this is a good practice or is there any ...
0
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1answer
2k views

Native vlan on D-link switches [closed]

I need to configure the trunk ports of the switch to tag all untagged frames with native VID.Configuring native vlan "Cisco way" is a solution. So I am looking for a way to configure native vlan on ...
2
votes
1answer
566 views

Problem with trunk between Cisco ASA 5505 and Catalyst 3750G

I'm trying to make a trunk between a Cisco ASA 5505 with the IP Service licence and a Cisco Catalyst 3750G. Here are my current config's: ASA: interface Ethernet0/1 switchport trunk allowed vlan ...
2
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1answer
594 views

HP 5900 Switch to ESXi vSwitch , how do you configure the HP port?

I have three ESXi hosts (Host A, B & C) all connected to a centralized Dell switch in trunk mode. Each using vSwitches (not dvSwitches). They are all configured for VLAN ID: All (4095). This ...
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2answers
163 views

Cisco VLAN configurations with WAP - Poor performance

We've recently applied a new modification to our network config. Separating two SSIDs into a guest \ corporate split config. All of the VLAN and DHCP scopes are functioning in the way it was designed ...
1
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1answer
695 views

Distributed Trunking with HPE 5130?

I am about to plan a Core Switch for a customer, who has only access switches connected to each other. I'd like to connect every core switch with two fiber connections to each of the two HPE 5130. I ...
2
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2answers
1k views

Adding a switch to provide redundancy

I inherited a network laid out (very broadly speaking) as follows: A number of access switches connect to 2 main switches. The Main Switch in the MDF (SW1) connects to the WAN router and is connected ...