Group of hosts with a common set of requirements connected as if on the same broadcast domain despite physical location

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0
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2answers
569 views

Switch sending DHCP packets to wrong VLAN

I have a basic remote site with a Cisco Catalyst 2924XL switch. There are 2 VLAN's at the site: 1 Default 2 Wireless There is a single server connected via a single ethernet cable, VLAN 1 is ...
1
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3answers
4k views

Duplicate MAC address on the same LAN possible?

Let's say someone is on the same network as me and spoofs their MAC address to match mine: Is this possible? Can two or more clients with the same MAC address be on the same network at the same time ...
1
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1answer
138 views

Physically isolated networks versus link aggregation + VLANs

When setting up internal cloud, the recommended best practice seems to be to isolate data traffic from management traffic by using separate L2 networks. For example, see the diagram in the OpenStack ...
1
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2answers
326 views

ASA, 2 WAN connections

I need help about configuration firewall ASA 5505 connected to 02 wan connections interface Vlan1 nameif inside security-level 100 ip address 192.168.254.1 255.255.255.252 interface Vlan2 ...
1
vote
1answer
1k views

VLAN security compared to DMZ

I found this question very illuminating about DMZs and when to place a server in one. We're re-organizing our internal company network (keeping the same external IPs and domains), our mainly Windows ...
0
votes
1answer
324 views

Multiple VLANs w/internet access?

My company has just setup some Brocade ICX-6610 switches as our new core. We have them setup in full layer 3 mode, and have started breaking what was once a flat network into multiple VLANs. We have a ...
6
votes
4answers
834 views

Best Approach for subnetting/VLANing traffic?

Our network is currently setup with no subnets or VLANs. We are looking at going to VoIP so this needs to change before VoIP is installed. I believe that we want to use VLANs to separate Voice and ...
5
votes
1answer
726 views

Procurve Primary VLAN

I'm trying to depreciate usage of VLAN 1 on my ProCurve switches; 1 is unused. I understand that VLAN 1 must exist, but I want to remove it from all ports, especially trunks between switches. The ...
1
vote
1answer
65 views

Setting up untagged VLAN on GE-24F4GBW

I got this old boy of a switch, which has been set up with some vlans. Everything works great when using tagged VLAN id's, and when using VLAN1 (default). However, I cannot set the PVID of a port to ...
0
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1answer
92 views

Changing DHCP Scope brought down the Internet connection

My school DHCP server(Win2008) runs out of IPs so I expanded the scope: original: 10.20.1.0 to 10.20.2.255 new: 10.20.1.0 to 10.20.3.255 But as soon as I finished it, all my workstations could not ...
1
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0answers
170 views

How to prevent partial crash during VLAN configuration on a HP ProCurve 3500

As you can see from my question, I have a VLAN configuration problem with a ProCurve 3500. The goal is to remove a VLAN from the existing configuration, however when I use the WEB UI to do this, I ...
0
votes
1answer
2k views

routing through multiple subinterfaces in debian

my question is as simple as the title, i have a debian 6 , 2 NICs, 3 different subnets in a single interface, just like this: auto eth0 iface eth0 inet static address 192.168.106.254 ...
1
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0answers
1k views

Is it possible to mix jumbo frames VLAN and standard mtu VLAN on the same switch port?

If a managed switch and all attached devices both support VLANs and Jumbo Frames, is it possible to mix VLANs with jumbo frames and VLANs with standard frames on the same switch port / ethernet card? ...
0
votes
0answers
432 views

Network Segmentation - router, switches, or both?

I'm just looking for advice/best practices on how to properly segment my network with the goal of it being as secure as possible, but also easy to manage. Currently, the network is flat and almost ...
0
votes
1answer
891 views

Ping from a PC to a Switch - beginner

I new to Cisco networking. I am trying out a simple Network. I connected 3 PCs to a Switch. PC A --> VLAN 10 ip address of PC A 100.100.100.3 PC B --> VLAN 20 ip address of PC B 120.120.120.3 ...
0
votes
1answer
231 views

Destination host unreachable

I have 2 router connected to 1 switch which contains two vlans, 1 router has the ip table of vlan1 and the other router have the ip table of vlan2 I have trunked both router cable to the switch. I ...
1
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1answer
177 views

Use switch access list or switchport trunk allowed?

How should I go about preventing a VLAN from accessing another switch, should I use access lists or use switchport trunk allowed except? Any advice appreciated.
0
votes
1answer
384 views

vlans broadcast works but ping doesn't

i have a server with ESX5, have a Standar Switch(vswitch1) with one physical NIC attached, vswitch1 VLAN ID is set to All(4095) so it can see traffic on any VLAN, connected to vswitch1 i have 2 VM, ...
0
votes
3answers
512 views

Multiple VLAN on one switch port

I have a HP ProCurve 1810G-8 which I currently use as a normal switch between 3 servers and a firewall. 2 of the servers are ESXi hosts, and one is a Nexentastor box with 2 iSCSI target LUNs. As the ...
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2answers
175 views

VLAN Creation no Internet Access

I have a dell switch 6200. I am trying to add a new VLAN to the current VLANs. I currently have a VLAN that is 192.168.01 255.255.255.0. The default Gateway is 192.168.0.1. I created a VLAN ...
1
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0answers
376 views

Access All VLANS over XenServer Interface

For my current setup, I have a physical NIC on a XenServer machine that receives traffic tagged with various VLAN IDs. I have a virtual machine that is running Vyatta that needs to be able to access ...
0
votes
2answers
403 views

Dell powerconnect 6224 vlan routing

I have a small network and I need help with routing .. . My VLANs VLAN 1010 SALES VLAN 1020 HR I have assigned the above vlans to a tagged port and I have added a default route to send the ...
1
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0answers
82 views

Datacenter redundant hosting setup advice

We are moving our servers to a new DC and I am looking for a bit of advice with our new COLO setup. I have some knowledge of networking but I am an enthusiast more than anything so it gets a bit ...
0
votes
2answers
264 views

No Internet for Created VLan on Cisco CE500

I'm new here and also with networking but i can't set internet conection for some vlan created. I have a Cisco CE500 switch and created 4 vlans define by the roles in the switch. Vlan 2: Servers ...
0
votes
2answers
146 views

connecting to server with multiple nics in other vlan

I'm sorry to be unclear... I will try to rephrase the problem. I work in a school as IT-administrator and I'm not a specialist, but try to make the best out of it. I hope you guys have a little ...
2
votes
2answers
197 views

Is a vlan for one server unnecessary?

DETAILS I've been researching web hosting solutions in Japan. Based on this question one of the services available seems to be a VLAN. I've read about the advantages of such a system for a large ...
1
vote
1answer
163 views

esx5 debian VM vlan setup

i have a server with ESX5, have a switch with about 20 vlans, this is how setup the trunk port interface GigabitEthernet0/1/1 description ToOper port link-type trunk undo port trunk allow-pass ...
1
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2answers
846 views

Windows 8 Hyper-V & VLANs

I'm trying to setup Windows 8's Hyper-V so that I have: Switch which has 2 VMS connected to it Vyatta box which is connected to said switch and set as trunk (native vlan 1, allowed vlans 1-4000) ...
2
votes
1answer
1k views

DHCP for Multiple Subnets

So this is the current setup - essentially I would like to get my DHCP server, serving DHCP requests for two seperate subnets. Netgear DG834G acting as a modem connected to a Sonicwall Pro 2040. X0 ...
0
votes
1answer
351 views

Cisco ASA 5505: switchport VLAN assignment

Kind of a Cisco Luddite, but I'd like to assign physical switchports 0/1 and 0/2 to Vlan2 and physical switchports 0/3 and 0/4 to Vlan3. I'm assuming this is possible with base security license, ...
0
votes
1answer
133 views

PVLANs between switches

Currently we make use of a "VLAN and network per customer" model and NAT. I'm considering building a single routed network and making use of PVLANs to keep customer data separately for the smaller ...
-1
votes
1answer
109 views

Vlan and Switch setting - dummy [closed]

I need to speak tomorrow the network engineer and I would like to understand his so apologise for the Dummy question: In the school we have a cab with a 24 port Netgear manageable switch with an ...
1
vote
1answer
197 views

TAGGED and UNTAGGED VLANS

What do we mean when we say Tagged VLAN and untagged VLAN. Suppose there is a switch and we create ACCESS and TRUNK ports on it. ACCESS port is a part of VLAN say 80 and TRUNK port is allowing VLAN ...
1
vote
1answer
318 views

Multiple vlans access to shared pbx system

I'm new to networking and was looking for some assistance. First off I'm using packet tracer to diagram my scenario as I will be receiving my equipment next week to deploy. Hardware to be used: 2 ...
2
votes
1answer
331 views

Can a Private VLAN trunk also trunk normal VLANS

Imagine a topology with Switch A and Switch B trunked together. Also imagine a router on a stick attached to Switch A that routes for these VLANs. The VLANs are as follows: VLAN 1 = 10.1.1.0/24 ...
2
votes
1answer
149 views

Access to WAN from one VLAN

i want to create a VLAN for 3 guest VMs. I already have it and every VM can ping each other, but the problem is that any guest CAN NOT have access to Internet Network configuration in Host machine # ...
0
votes
1answer
258 views

Private VLAN configuration (With Diagram)

I mocked up a diagram in Visio as it can explain the network topology better than I can: http://i.imgur.com/fnPBe.jpg VLAN 1 is a standard VLAN Basically the top switches contain hosts on VLAN 1 ...
1
vote
1answer
166 views

Cisco Private VLANS with L3 switch

I understand the concept of PVLANs. All the guides I have been reading assume a simple topology with many hosts on a switch and a single router (default gateway). The router's port is designated as ...
2
votes
0answers
478 views

Configure vlan on Netgear switch via SNMP

I am trying to configure vlans on a netgear GS752TSX from the Linux command line with netsnmp. I have created vlan 99 on the web interface now want to control the pvid settings, egress and tagging. I ...
2
votes
1answer
404 views

Routing between two VLANs on Single Dell 6200 Switch

I want to be able to route between two vlans that I have created and I am not sure how to go about it. So I have created, VLAN 5 with IP Address 192.168.5.1/24 and VLAN 10 with IP Address ...
1
vote
2answers
425 views

Multiple VLANs on a single subnet

I would like to establish the setup shown below. The image is taken from (http://gcharriere.com/blog/?p=620) and explains how to set this up on a brocade device. I would like to use an ubuntu server ...
2
votes
1answer
686 views

Cisco: changing VTP mode server/client to transparent

I have around 40 L2 switches IOS v12.0-12.2 (2960, 3560, 3500, 3750) running in VTP client mode and one L3 switch CatOS v6.3(5) (6500) running in VTP server mode, all connected together. I would like ...
-1
votes
1answer
78 views

Using PVLANs with normal VLANs in a trunked environment

Assume a trunked environment with two switches, S1 and S2. The swtiches are connected with a trunk port designed to pass VLAN 26. What would happen if VLAN 26 on S2 is configured as a private-vlan ...
0
votes
1answer
60 views

Using PVLANS in conjunction with standard VLANs

For added security I am migrating out network to use PVLANs. My question is given standard VLAN (192.168.0.0/24) can I designate a few ports as isolated\promiscuous while still having the others work ...
0
votes
2answers
564 views

Inter-vlan routing issues

I've been brought in to help administer a network and I've run into an issue - I'm not sure why this one is beyond me, however I figure an extra set of eyes on the problem may help resolve the issue. ...
1
vote
1answer
128 views

VLAN Configuration Conflict, Who Wins?

I'm new to VLANs, so take that into consideration... Lets say that I had a server set up to create a virtual interface that is set to be tagged as VLAN 3. For example, the following Debian config: ...
7
votes
2answers
148 views

VLAN Inheritance?

Imagine the following scenario: Primary Switch | (VLAN 3 Port) | Unmanaged Switch (Dedicated to IPMI Interfaces) | / \ / \ Server 1 ...
1
vote
1answer
265 views

Procurve VLAN configuration

I have two ProCurve 1800-24G J9028B linked toghether by a fiber channel on ports n.23. I want an ethernet port (ex. port 21 of switch n1) to be isolated from all the others except of one of the other ...
-2
votes
2answers
234 views

Linux OS with GUI based multiple vlan support [closed]

Is there a distribution of Linux that includes support in the gui for managing 802.1q (trunks) We have techs in the field that may need to change from one vlan to another but don't know Linux CLI at ...
1
vote
1answer
453 views

Openstack - Connectivity between instances on 2 separate nodes

I have the following setup: 1 x Management Node (node A) 2 x Compute Nodes (node B & C) 1 x Volume Node (node D) Relevant configurations: VlanManager multi_host=true Node ...