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Questions tagged [trunk]

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

5
votes
1answer
363 views

Assigning a single switchport to different VLANs

I've been trying to figure out how to achieve the outcome below. VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- ...
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0answers
16 views

DTP On Trunk Ports [duplicate]

When Statically Configuring a Port As Access, DTP Will Be Automatically Disabled. So Why Is It When Statically Configuring a Port As Trunk, DTP Will Still Be Enabled?
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1answer
32 views

when to make a port dynamic desirable instead of trunk?

i'm reading CCNA stuff and just got stuck in this issue: i read some articles about DTP and trunking but didn't understand when to make a port trunk and when make it dynamic desirable ? in what case ...
0
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1answer
32 views

Quanta LB6M : how to make trunk port

My hardware is (quanta10g-uha) #show hardware Switch: 1 System Description............................. Quanta LB6M, 1.2.0.14, Linux 2.6.21.7 ...
1
vote
1answer
37 views

Dhcp Broadcast Through Switches

Think of a pc connected to switch1. Sw1 is connected to sw2(trunk port on both switches) and sw2 is connected to a router(dhcp server). Pc sends a dhcp broadcast. Does sw1 passes the broadcast through ...
0
votes
1answer
56 views

Create a dead end vLAN for untagged/native between Aruba and Cisco switches

I would like to use a dead vLAN as the native/untagged vLAN on trunk feeds as a security best practice. The trunk feed is between a Cisco and Aruba switch. On Cisco switch, the vLAN is left out of the ...
4
votes
1answer
119 views

What are reasons to configure a Voice VLAN using the Auxillary VLAN feature instead of a Trunk + Native vLAN

Imagine this topology: [PC] ------- [VOIP Phone] ------- [eth0/0 on a Switch] And this configuration on the switch: vlan 22 name DATA vlan 33 name VOICE There are two ways to have both the PC'...
5
votes
1answer
95 views

What is VLAN Hopping

I am starting on my journey into the world of Networking and have come across a term called VLAN hopping. The sentence I read was that if the Native VLAN on two switches connected to each other via ...
0
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0answers
24 views

How to set the network module port to trunk?

I use the SuperMicro network module, which use Intel SDN product, the command PDF . and the Web GUI manual. Now, I want to make the qe57 port to a trunk mode, but I don't find a command to set. 192....
1
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2answers
45 views

Partitioning between VLAN in a Trunk switch architecture

Supposing we have a Trunk switch architecture with multiple VLAN as shown below : A computer that belongs to the VLAN1 on the first switch (from the left) will be able to communicate with the VLAN1 ...
3
votes
1answer
78 views

Need help/advice on basic network setup involving security cameras, guest access, and VLANs

At some point, I'd like to move from a single, flat, network to having a more secure network using VLANs. I have an idea of what I would want, I just don't fully understand some details of Native ...
2
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2answers
44 views

Use of VLAN allowed feature and security risk associated with not configuring it

if i have 3 vlans say, 10,20 ,30 if i don't assign vlan allowed to trunk port , what are the security risks i could face if i am using default vlan allowed range what are the benefits of VLAN ...
4
votes
2answers
243 views

Does 802.1Q protocol will remove the VLAN tag in the received place?

Does 802.1Q protocol will remove the VLAN tag in the received place? Such as the VLAN 10 trough 802.1Q protocol to pass frames. the 802.1Q will add 802.1q header(tag) and recalculate CRC/FCS like ...
1
vote
1answer
143 views

How can I set the switchport's trunk protocol?

How can I set the switchport's trunk protocol? 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 ...
2
votes
1answer
99 views

trunk between two switches on different network

I have a trunk setup between the 172.16.64.2 and 172.16.128.2 switches, but I can't ping them. I can only ping their default gateways which is their .1 on the router. What am I doing wrong?
1
vote
1answer
95 views

Layer 3 switch model 3950 encapsulation

How to ensure trunk link in the switch are using dot1q encapsulation, when dtp (dynamic trunking protocol) is enable along with vtp. I know when manually setting trunk links, you can force the trunk ...
1
vote
3answers
60 views

Management switch as a medium only

The main goal is to guarantee communication between CE switches without any PE reconfiguration. Interface GE0/0/1, GE0/0/2, GE0/0/3, GE0/0/4 will be connected to Customer switches. Customer decide ...
3
votes
2answers
141 views

Change VLAN id in trunk

I have 3 L3 switches. They're connected to each other with a trunk (in which I need to define the allowed VLAN's). On SW1 I have for example vlan 100. On SW3 I also have vlan 100, but it's another ...
1
vote
1answer
273 views

Cisco ASA context OSPF configuration issue

I've two cisco ASA configured in active/active HA. ASA is connected to switch with port-channel. Switch configuration: interface Port-channel47 description ASA2 switchport mode trunk switchport ...
1
vote
2answers
247 views

spanning tree loop with bpdufilter on acces port but not on trunk?

┌─────┐ ┌─────┐ | A ┼------┼ B | └─────┘ └┬───┬┘ └---┘ <-- loop behold the above drawing. this is a test setup connectin switch A and B, and a test loop A: cisco ...
3
votes
2answers
3k views

Port channel to two different switches

We had a technician move one of two port channel links from an old switch to a new switch before telling anyone. This left the new and old switch both connected to different links of the same channel ...
2
votes
1answer
520 views

Really basic SG300 VLAN setup not working

My understanding of VLANs may need improved, but isn't the idea that you can run multiple LANs at layer 2 level over the same router if VLANs are setup correctly on the SG300? If so, I fail to see how ...
3
votes
1answer
258 views

Add links to a port channel group without downtime

There are two trunk links with the same configuration connecting two switches. Currently they are independent links and one is blocked with spanning-tree. I would like to convert these to a single ...
1
vote
1answer
55 views

Pinging/ssh-ing into just trunk interface. How is it done? [closed]

I'm a junior network technician and I was tasked at work to do a switch upgrade. The most important part of this task is to set up SSH so we can at least get into the switch remotely configure once ...
1
vote
1answer
107 views

Sharing VTP Info Between two VTP Servers

Im trying to share info between two vtp servers these vtp server are connected using Etherchannel I have configured both on server mode, using the same domain and password, but the right one is not ...
3
votes
1answer
83 views

What is a fractional port?

I was reading a product sheet about a Metro-Ethernet backhaul service which mentions, which is described as a mechanism to connect two datacentres within the same region (ie, city) via point-to-point ...
1
vote
1answer
394 views

Trunk Ports only Allowing Native VLAN?

I'm trying to set up a guest network. The native VLAN for our switches (all Cisco Catalyst switches) was never changed away from 1 (untagged). I've created VLAN 20 to use for the guest network. ...
1
vote
1answer
206 views

Vlan trunking and routing

I need help with something. I have this topology and i want to know how to go about configuring it: I have 4 vlans and 10 hosts and 6 switches I have created 4 vlans vlan 2- Admin Vlan 3 - ...
4
votes
2answers
149 views

increasing bandwidth between two Cisco switches?

2 Cisco 3750 switches are connected via port 22(Trunk). First switch consists of 3 VLANs(each vlan have 7 ports such as 1-7,8-14,15-21) and 2nd switch consists of 2 VLANs. what solution can i use to ...
3
votes
1answer
278 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 ...
4
votes
2answers
2k 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 ...
1
vote
0answers
495 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
votes
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
vote
1answer
88 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
votes
1answer
352 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
votes
1answer
70 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?
2
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2answers
263 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 ...
1
vote
3answers
1k 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
vote
1answer
153 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
votes
1answer
456 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. ...
1
vote
1answer
53 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
votes
1answer
1k 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
vote
2answers
1k 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
vote
1answer
264 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... ...
0
votes
2answers
233 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
votes
1answer
316 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 ...
3
votes
2answers
361 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 ...
2
votes
3answers
476 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
vote
1answer
114 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
vote
1answer
450 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)...