Questions tagged [vlan]

For questions about Virtual LANs (VLANs) which are used to divide what otherwise would be a single OSI layer-2 broadcast domain into multiple, logical OSI layer-2 broadcast domains.

Filter by
Sorted by
Tagged with
3
votes
1answer
281 views

Port Channel Hybrid Port Issue

I have a Dell Sonicwall NSA 4600 running the latest firmware with an Interface that's configured to have a secondary redundant port. This interface also has a VLAN sub interface assigned to it. On ...
0
votes
1answer
49 views

What would happen if I connect VLAN aware NICs via a hub?

What would happen if I connect VLAN aware NICs via a hub? The vlan tagging is enabled and the hub here means a device that electrically connects the lines together. Would the frames with different ...
0
votes
1answer
58 views

OSPF with 2 Routers, N redundant links

I'm having a hard time trying to find a solution, and I can't seem to find anywhere on the web exactly what I need. We need to configure 2 Routers (MOXA EDR 810) to have N redundant links between one ...
0
votes
1answer
41 views

DHCP Help 3560-CX + Aruba AP515

The problem VLAN 100 is not assigning IP address to the SSID Guest from the AP, but Aruba is Tagging the SSID to be VLAN 100. How do I get the Switch to assign the DHCP? On the switch, it seems to ...
0
votes
1answer
65 views

How do I apply an access list on a switch?

I'm configuring a very small network on packet tracer 8.0 and I have a single 2960-24TT switch which is connected to 2 PCs and 1 router. Everything is on the 24.17.2.0/24 network and I added a VLAN. I ...
0
votes
1answer
23 views

Why I can't ping my switch Vlan99?

In the following network, I have configured every device but somehow I can't ping my Customer-PC and Technical-PC to PasirGudang-SW and Segamat-SW. The PCs can ping the other ip address just fine ...
0
votes
0answers
8 views

Moving hosts between VLANS [closed]

I have a question regarding the ability for a server to move devices between different VLANs. For example, I have VLAN 1 at 192.168.1.0/24 and VLAN 2 at 192.168.1.1/24. if my IDS registers something ...
1
vote
0answers
9 views

MRV OptiSwitch “action tag nest”

What does this command does in an MRV OptiSwitch ? action tag nest [VLAN X] The configuration of the whole rule is the following : rule 1 action redirect port X action tag nest [VLAN X] tag eq ...
1
vote
0answers
12 views

DATA & VOICE VLAN ROUTING BETWEEN 2 ROUTERS [closed]

Good Afternoon All- I would appreciate a little help with a current issue I am facing... I can ping all Network Segments, all Routers, all Switches, and all Servers on the network. PROBLEM IS: I CAN'T ...
1
vote
1answer
34 views

Is it possible to configure Cisco ASR901 as a layer 2 VLAN switch?

I have been fiddling with a Cisco ASR901 for a while now, but I can't wrap my head around configuring it as a layer 2 VLAN switch. Is it not possible to configure one of its Gigabit Ethernet ports as ...
1
vote
1answer
10 views

IPFIX vlanId element in access switchports

According to IANA definition, IPFIX elementId 58 vlanId is: Virtual LAN identifier associated with ingress interface. For dot1q vlans, see 243 dot1qVlanId. But according to RFC5102: Description: ...
3
votes
1answer
23 views

is private Vlan concept an alternative for access-list configuration?

is private Vlan concept is introduced by cisco for alternative for access-list to segregate traffic among different Vlan and within same Vlan .
1
vote
1answer
33 views

With reference to Juniper MX , what's the difference between Bridge Domain and Learning Domain?

I am trying to understand the difference between bridge domain and learning domain. I have tried to read through documentation and Juniper MX series book but no success. Need to understand the ...
0
votes
1answer
461 views

JUNIPER EX-2200-C Layer 3 Switch Configuration

I am setting up attempting to simulate a small infrastructure of Clients and Servers. Current Setup 1x. Dell Inspiron Tower Running ESXI 6.5 1x. HP Z800 Workstation Running ESXI 6.5 1x. Juniper ...
0
votes
1answer
23 views

How to connect 2 SIP trunks to a PBX device which only has 1 SIP trunk port?

I stumbled upon a bit of an issue regarding SIP trunk here. In short, I am doing a PBX project for a company & this company leased 2 SIP trunks from the local telephone service provider. The ...
2
votes
2answers
23 views

How does the VTP Client update it's information if the revision number is equal?

I am new to networking and my questions may be a bit weird. Please correct me if I am wrong. According to what I understand, Client updates it's information with the Server's if the Server's revision ...
0
votes
2answers
31 views

transfer vlan from one cisco switch to an other through a central cisco switch

I can't figure out how to pass one vlan from one switch to an other: Let's say, I have 2 valns: Vlan 1 and Vlan 2 3 cisco switches: Cisco Catalyst 3560g (central switch) Cisco SG-300 (with native ...
2
votes
1answer
6k views

How to configure DHCP Relay Agent with multiple VLANs?

I have a network with 2 routers. Router 0 is a DHCP server and Router 1 I assume should be a relay agent. The routing protocol I use is EIGRP. The problem is that PC in vlan 15 and vlan 20 cannot get ...
1
vote
1answer
50 views

VLAN not working in ComNet switch [closed]

I'm trying to configure VLANs with 3 switches ComNet (2- CNGE2FE8MSPOE + 1- CWGE26FX2TX24MSPOE) and it's not working as I expect. It's the first time that I work with VLAN and I don't know If I didn'...
0
votes
1answer
43 views

How to connect to different VLANs through VPN

I have the following setup: I have setup a Layer 3 Switch with multiple VLANs Multiple devices are connected to it on different VLANs via untagged access ports There is also a router connected to the ...
0
votes
0answers
32 views

Masking all IP Addresses in a subnet to appear as one IP Address on the main network Using Siemens S615

I am trying to create a network setup that would take many devices that are working together and have them appear as one device or IP on a network using a Siemens Scalance S615. The setup would be as ...
0
votes
1answer
32 views

Do unicast frames get sent to all switches associated with the target VLAN?

If a network topology has a VLAN which spans multiple switches, what happens if a frame is sent to a MAC address that is connected to the source device's "home" switch? By that I mean if a ...
1
vote
7answers
423 views

IP Helper in Multiple Access Switches

Just a dumb question.. I have 1 core switch and 5 access switches. Just wondering if it would be best to setup the IP helper on all access switches rather than just on the core switch? Does this ...
0
votes
2answers
120 views

STP Priority field and 4 bits in multiples of 4096

For the STP Priority Field, how do you get "multiples of 4096" out of 4 bits?
0
votes
1answer
58 views

Design question: VLANS or Routed interfaces over dark fiber between sites seperated by 10s of km

Production network design idea: 7 sites total. Each site has an HP Procurve core switch. Each switch has at least 2-10G dark fiber connections to other sites. A few links are under 40km, the remaining ...
0
votes
1answer
96 views

Duplicated Vlan ID

I have one flat network with our data center and it is causing as a lot of issues, so i had to design a new network to separate the buildings from the data center, when I designed the new network i ...
1
vote
1answer
92 views

pFsense, Unifi AP, HP switch and VLANS

I have a Unifi AP with a single MYNET SSID connected to my HP 2520 switch on port 23. I have a pfSense LAN interface connected on port 1. AP clients get DHCP (192.168.1.0/24) from pfSense and can ...
4
votes
1answer
8k views

VXLAN: how receiver knows that the received packet is VXLAN-encapsulated?

I'm trying to understand how a receiver knows that the received packet is a VXLAN-encapsulated. Looking at the VXLAN RFC, I can't see anything specific that defines that the packet contains VXLAN ...
0
votes
2answers
55 views

Tagging a VLAN or not

I want to create a wi-fi network for guests using access points. I asked to the IT provider a dedicated network with its VLAN and it is: 172.16.0.0/24 VLAN ID 344 The above network is configured on ...
2
votes
1answer
123 views

Correct vlan/interface config for connection to upstream provider network

We have recently switched from HP Procurve series to HP Comware based switches. A configuration which has been working on Procurve doesn't seem to work on Comware. Here are the details: The provider ...
1
vote
0answers
17 views

Merge (and split) 2 different LAN in one Cable with VLAN? [closed]

I am searching for a way to connect two different buildings with one GB Ethernet Cable. On both LAN i have two different routers with different subnets that needs to be remain in the new building. The ...
2
votes
2answers
521 views

Cisco 2960 not receiving dhcp from the router

I have a problem with Dhcp of some the Vlans. here is how my network is : I have a router ASR1001, which connects 15 switches(2960) as a ring topology. each switch has a subinterface of the router ...
0
votes
1answer
56 views

pfSense - Trunking VLANs on LAGG vs. individual links

We are a small business. I am running pfSense on a decommissioned developer's PC. We have also a Cisco SG 300 L3 switch, capable of VLANs and LAGG (link aggregation). I am going to do RoaS (router on ...
-1
votes
3answers
586 views

how to make multiple subnet able to use one resource without being able to connect to each other in any way

i`m trying to connect multiple subnets to one web server but these subnets should not be able to connect to each other.i cant make any changes on these subnets. I just have a lan cable from each ...
4
votes
3answers
381 views

Mgmt Vlan vs other SVI s

Think of a layer 3 switch. Assume that we have a management vlan and a mgmt vlan interface. And we have other svi's on the switch. The question is this. I know that mgmt vlan is for telnet/ssh, simply ...
0
votes
1answer
23 views

client has 2X1910 switches 1x1920 switch traffic not passing correctly some nodes are responding to pings and others are not [closed]

New to vlans, bridging across multiple L3 switches and not sure where to start so here goes in hopes of learning Layout is this 1910-24g-POE (Switch01)>>>>>>>>>>>>&...
2
votes
3answers
1k views

Inter VLAN routing on layer 3 switch over routed ports with trunk link

Gentleman, Please let me know if is scenario on picture possible. I don't know how to configure layer 3 switch over routed ports with trunk link which is connected to layer 2 switch.
2
votes
1answer
2k views

Configure Routing on Catalyst 3650 with LAN Base

I am attempting to configure routing on a Catalyst 3650 running LAN Base to meet a particular set of criteria. For context: the switch is being configured as part of a lab environment that will allow ...
4
votes
5answers
46k views

Intervlan routing using two Layer 3 Switches in Packet Tracer

I am having trouble when I am using two Layer 3 switches and two PCs to create a simple network for Inter Vlan routing, First of all have a look at this network, The configuration for PC1 is, IP: ...
5
votes
2answers
3k views

Routing on firewall vs L3 switches

So we have an environment with several VLANs connected to a FortiNet firewall using multiple interfaces trunked back to our L3 Dell PowerConnect 6248P switches. Currently the FortiNet is setup to do ...
1
vote
2answers
56 views

Transfer subnet needed between Firewall and Routing Switch?

When looking at the image, the Switch is routing capable (L3) and is the default gateway for clients in the LAN. We plan to introduce a new Firewall and stand before the question if we should give its ...
2
votes
2answers
3k views

How to assign multiple VLANS to a port?

I have a simple question about a network (I am new to this concept so please correct me if I am wrong). I have a simple network as shown (GNS3): The network have 3VLANS (VLAN10 = DesignTeam, VLAN30 ...
6
votes
4answers
6k views

Why do we use VLAN?

According to my understanding, the network switch will look out for the specific MAC address and then it will forward the frame so basically it doesn't broadcast the frames then why do we make VLANs? ...
3
votes
2answers
2k views

Wireless access point to switch connection

I am a newbie to networking. I think I have a good grasp on Switching, routing and VLANs. I am trying to extend my knowledge to wireless networks. Looking for answers on a few questions Should I ...
2
votes
5answers
5k 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 ...
3
votes
4answers
925 views

How can I introduce VLANs to an existing setup with wireless Access Points?

I am by no means an expert when it comes to networking but I recently inherited a network setup which is using wireless Access Points that clients can connect to (usually via a wireless device used in ...
2
votes
2answers
40 views

Cisco Catalyst: interVLAN with shared addressing

Can I make several VLANs in a typical Catalyst (for instance, Cisco C3640) that share the same addressing? For example: vlan 1 -> address in Fa0/0.1: 3.3.3.1/29 vlan 2 -> address in Fa0/0.2: 3.3.3.2/...
1
vote
2answers
704 views

Switch0 is configured as DHCP server but not working?

Here I am not able to obtain ip automatically using DHCP. Here is configuration of swtich0 which is having DHCP Server. Switch#sh run Building configuration... Current configuration : 1237 bytes ! ...
2
votes
3answers
46 views

Need help with setting vlans(is it possible?)

I have network like this: i have 2 problems: a) how to create connection in vlans between 2 hosts in diffrent networks? b) how i can set vlan 4 to be seen by rest vlans(1,2,3) but 1,2,3 must be ...
2
votes
3answers
1k views

Can VLANs with same no but on different switches communicate with each other?

If i have a VLAN (say VLAN 10) on switch 1 and again a VLAN 10 on switch 2. Can the hosts on these VLANS communicate with each other?

1
2 3 4 5
23