• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 469
  • Last Modified:

I have two separate networks that need to share one internet connection


I am no networking guru and so am looking for a little bit of advice

We currently have two sites that will be merged into one. Both sites haveapproximately 10 users and one SBS2003 premium server each.

When they come to the one site we need to keep the networks separate but still give access to the internet through one adsl connection.

What is the best approach to take including any hardware considerations we may need to take

Our network set up goes something like

clients - - - clients ----> sbs2003-----> pix 506 firewall ---->adsl connection ---->internet

Thanks in advance
  • 7
  • 7
1 Solution
Fatal_ExceptionSystems EngineerCommented:
Not sure what you mean with your diagram..  You are merging these two sites into one location, but are you keeping both servers (domains) separate?  From your diagram, it appears you are not..  or did you mean this?  :

clients  <-> SBS Server 1 <->
                                               <->  Pix <-> ADSL Modem <-> WAN
clients  <-> SBS Server 1 <->

If so, you only need a router (or a managed Layer 3 switch with VLAN capabilities) to aggregate the two connections into one WAN outside line through your PIX.  This will keep the domains separate, including broadcasts, etc...

cyjazzmanAuthor Commented:

Sorry should have been clearer

The diagram is the basic set up at each site. I didnt diagram the desired set up.

The setup you have diagramed is what we are trying to achieve. Do you know of any good tutorials / resources for configuring VLAN's?

Any suggestions on particular models of switch to purchase aswell?


Fatal_ExceptionSystems EngineerCommented:
For your setup, with 20 users and a couple of servers, you could go with a low scale Cisco 1924 Switch, but you will need a router for this to route between the VLANs, as it is a Layer 2 switch only...  The router must support VLAN trunking if you want the domains to be able to access the other VLANs.  If you don't need to have access from one VLAN to another, then it is not a concern.  The thing is, be ready for quite an expense if you wish to have it all in one device.

Layer 3 Switching:


Vlans are setup within the CLI (Command Line Interface) and are really not hard to do, except you need to have an understanding of the command syntax, and they do provide a 'friendly' menu driven interface, which is much easier for the Cisco novice.  

Cisco provides an abundance of resources on 'how to's' for all their devices..  For instance:



and then there are other sites available such as this one..


Now, I am not an 'expert' on Cisco, like some of our other contributers, like Lrmoore...  But I have setup basic routing and switching needs in the past...  If he sees this thread, he can add much to answer any questions you may have....  

Cloud Class® Course: Python 3 Fundamentals

This course will teach participants about installing and configuring Python, syntax, importing, statements, types, strings, booleans, files, lists, tuples, comprehensions, functions, and classes.

cyjazzmanAuthor Commented:
I have set up a pix before so hopefully I could also manage to set up a switch and router. ALthough from my understanding PIXOS is totall different to IOS, is that right?

Thanks for your help so far, I will take a look at the hardware required and those other sites, I may be back with a few more questions.

Fatal_ExceptionSystems EngineerCommented:
Not totally different in the context, but different in the commands and syntax...  If you have experience in PIX then you should have little trouble with switches, especially if you use the Menu Driven setup..  

I suggest anyone wanting basic training for these (and I mean basic), that they purchase the CBT Nuggets CCNA videos.  When I had to get up to speed on Cisco quickly last year, I bought them and they helped a lot...  They won't get anyone ready to pass the CCNA without a lot of additional reading, but they do jump start you into the Cisco IOS, and show how to create VLANs, etc...


If you want to see a sample, they have some free videos for you to ck out..  I think the free Cisco is the OSI Model, which won't do you much good, but you can see how they train..

cyjazzmanAuthor Commented:
Excellent thanks FE

I will take a look at this tonight.

Just a couple of things quickly, the 1924 only provides 2 x 100mb ports, a lot of the work that this office does is heavy multimedia files (i.e large) so we really want a full 100basex switch, what is the recommended model in this scenario?

Also, I dont kow where to begin with looking for routers, Cisco hardware is not my strong point

Thanks again
Fatal_ExceptionSystems EngineerCommented:
Yea.. you are right..  the 2 100 Mbps ports are used to link switches and routers together, not for connecting your collision domains (PCs).  These are strictly FastEthernet ports..  You will have to jump up to a more expensive solution if you need 100
Mbps ports...  Something like a Catalyst 3524 Switch, 24 Ports 10/100Mbps.  You might ck out the Refurbs though for a price break..  just make sure you get a good warranty..


cyjazzmanAuthor Commented:
With this product would we still need a router?

I know its not cisco but our it budget is pretty low :-(

NETGEAR FSM7326P - Switch - 24 ports - EN, Fast EN - 10Base-T, 100Base-TX + 2x10/100/1000Base-T/SFP (mini-GBIC) external  
  Maximize your 10/100 network. The NETGEAR FSM7326P Switch features Power-over-Ethernet (PoE), which optimizes the installation and power management of network devices such as wireless access points (AP), Voice over IP (VoIP) phones, and security video cameras. Power-over-Ethernet (IEEE 802.3af) capabilities reduce installation costs for many new network productivity devices. It frees your wireless AP deployment from restrictions due to power outlet locations. Power and data switching are integrated into one unit and delivered over a single cable, eliminating costs for additional AC wiring and reducing installation time. The FSM7326P Layer 3 provides both Layer 2 and Layer 3 managed switching functionality, including routing, switching, and quality of service (QoS) feature sets. It can be used to provide new IP-based services: multiple VLANs, QoS, bandwidth limiting, and access control features enable smooth, clear VoIP telephony and video conferencing; subnetting and strong, standards-based security protocols isolate wireless APs and video surveillance equipment, protecting critical data from potential abuse; IP subnetting and gigabit ports provide dedicated high-speed links to servers and network backbones. Affordable and reliable, the FSM7326P's robust feature set is ideal for small and growing businesses that want to get the most out of their networks.  
Ingram Micro SKU: 0710460 Part Number: FSM7326PEU        
   Extended Specifications  Related Products
Main Specifications
Form Factor    External    
Manufacturer Warranty    Limited lifetime warranty    
Dimensions (WxDxH)    44 cm x 38.5 cm x 4.3 cm    
Power    AC 110/230 V ( 50/60 Hz )    
RAM    128 MB    
Device Type    Switch    
Data Transfer Rate    100 Mbps    
Ports Qty    24 x Ethernet 10Base-T, Ethernet 100Base-TX    
Data Link Protocol    Ethernet, Fast Ethernet    
Flash Memory    16 MB    
Auxiliary Network Ports    2x10/100/1000Base-T/SFP (mini-GBIC)    
Product Description    NETGEAR FSM7326P - switch - 24 ports    
Compliant Standards    IEEE 802.3, IEEE 802.3U, IEEE 802.3z, IEEE 802.1D, IEEE 802.1Q, IEEE 802.3ab, IEEE 802.1p, IEEE 802.3af, IEEE 802.3x, IEEE 802.3ad (LACP), IEEE 802.1w, IEEE 802.1x, IEEE 802.1v    
Features    Flow control, routing, Layer 3 switching, Layer 2 switching, DHCP support, power over Ethernet, BOOTP support, VLAN support, IGMP snooping, port mirroring, manageable, store and forward, IPv6 support    
Remote Management Protocol    SNMP 2, RMON 1, RMON 2, SNMP, RMON 3, RMON 9, Telnet, HTTP    
Extended Specifications
Width  44 cm  
Depth  38.5 cm  
Height  4.3 cm  
Device Type  Switch  
Enclosure Type  External  
RAM  128 MB  
Flash Memory  16 MB  
Expansion / Connectivity
Expansion Slots Total (Free)  2 SFP (mini-GBIC)  
Interfaces  24 x network - Ethernet 10Base-T/100Base-TX - RJ-45 ¦ 2 x network - Ethernet 10Base-T/100Base-TX/1000Base-T - RJ-45 ¦ 1 x management - RS-232 - 9 pin D-Sub (DB-9)  
Manufacturer Warranty
Service & Support  Limited lifetime warranty  
Service & Support Details  Limited warranty - lifetime  
Features  Flow control, routing, Layer 3 switching, Layer 2 switching, DHCP support, power over Ethernet, BOOTP support, VLAN support, IGMP snooping, port mirroring, manageable, store and forward, IPv6 support  
Connectivity Technology  Wired  
Data Link Protocol  Ethernet, Fast Ethernet  
Compliant Standards  IEEE 802.3, IEEE 802.3U, IEEE 802.3z, IEEE 802.1D, IEEE 802.1Q, IEEE 802.3ab, IEEE 802.1p, IEEE 802.3af, IEEE 802.3x, IEEE 802.3ad (LACP), IEEE 802.1w, IEEE 802.1x, IEEE 802.1v  
Data Transfer Rate  100 Mbps  
Status Indicators  Link activity, port transmission speed, power, link OK  
Ports Qty  24 x Ethernet 10Base-T, Ethernet 100Base-TX  
Remote Management Protocol  SNMP 2, RMON 1, RMON 2, SNMP, RMON 3, RMON 9, Telnet, HTTP  
Switching Protocol  Ethernet  
MAC Address Table Size  8K entries  
Auxiliary Network Ports  2x10/100/1000Base-T/SFP (mini-GBIC)  
Routing Protocol  RIP-1, RIP-2, IGMPv2, IGMP, VRRP, OSPFv2  
Compliant Standards  CE, FCC Class A certified, TUV, C-Tick, CISPR 22 Class A, cUL, EN 60950, EN50081-1, IEC950, UL 1950, VCCI Class A ITE, EN55024, CSA 22.2 No. 950, EN55022 Class A  
Rack Mounting Kit  Included  
Authentication Method  RADIUS  
MTBF  58,300 hour(s)  
Power Device  Power supply - redundant - internal  
Voltage Required  AC 110/230 V ( 50/60 Hz )  
Power Consumption Operational  36 Watt  
Software / System Requirements
Peripheral / Interface Devices  CD-ROM  
Environmental Parameters
Min Operating Temperature  0 °C  
Max Operating Temperature  40 °C  
Max Altitude Operating  3 km  
Fatal_ExceptionSystems EngineerCommented:
Yes, Netgear makes a good product, and even though I am not familiar with this specific Layer 3 device, it sure looks like it can do the job.  Probably easier to configure than a Cisco too.  I like all the features it comes with, including the routing protocols, although for your use, RIP V1 will do just fine...
cyjazzmanAuthor Commented:
Excellent and at £600 all-in, its within our budget.

I currently have netgear switches in all of our sattelite offices but they are all unmanaged - however they've always been very reliable.

Thanks for all your help I will award the points to you with great pleasure
Fatal_ExceptionSystems EngineerCommented:
great..  I will also keep an eye out for that Netgear Switch..  I would be interested in seeing what it can really do..

Best of luck with you Lan Merge!

cyjazzmanAuthor Commented:
thanks very much FE you have been a great source of help.

Fatal_ExceptionSystems EngineerCommented:
you are welcome..  come on back when you need more help!

And thanks!

cyjazzmanAuthor Commented:
I sure will, keep a look out for more questions from me
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Upgrade your Question Security!

Your question, your audience. Choose who sees your identity—and your question—with question security.

  • 7
  • 7
Tackle projects and never again get stuck behind a technical roadblock.
Join Now