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Questions tagged [trunk]

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

5
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1answer
48 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
22 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....
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2answers
39 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
57 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
votes
2answers
41 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
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2answers
102 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
73 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
76 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
63 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
59 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
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2answers
101 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
189 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
189 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 ...
2
votes
2answers
2k 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
376 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
166 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
52 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 ...
0
votes
0answers
88 views

ROAS driving me crazy

Can anyone else help me please! I have all clients connecting to a L2 switch, these trunk (etherchannel) into another L2 switch, which then trunk (etherchannel) into another L2 switch (core) and these ...
1
vote
1answer
81 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
79 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
267 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
165 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
112 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
250 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
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0answers
456 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
76 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
226 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....
1
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1answer
61 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
votes
2answers
213 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
944 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
128 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
393 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
52 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
201 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
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2answers
206 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
278 views

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

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
296 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
433 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
107 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 ...
0
votes
1answer
395 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)...
1
vote
1answer
55 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
vote
3answers
1k 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
vote
1answer
47 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
votes
1answer
212 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
420 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 ...
1
vote
2answers
12k 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?