?
Solved

Cisco router to handle traffic for multiple subnets

Posted on 2010-09-10
4
Medium Priority
?
477 Views
Last Modified: 2012-08-13
Hi Cisco Router Experts:

I have a question regarding the best way to grow my network.  I provide Internet to a couple hundered customers and use private static IPs (10.50.10.x - 255.255.255.0).  I use a cisco 2621 router as gateway  10.50.10.1.  

I've outgrown the single subnet and want to add new customers on 10.50.20.x addresses.

What is the best recommendation for this expansion?  Should I just add another cisco router as 10.50.20.1?  Or can the single cisco router act as a gateway for multiple subnets?  If so, what commands would I need to add.

Thanks for your advice!

0
Comment
Question by:dkbeckstrom
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 24

Assisted Solution

by:rfc1180
rfc1180 earned 1200 total points
ID: 33647187
The Cisco 2621 (non XM) handles about 25Kpps @ 64Byte packets, so depending on what you are utilizing now, you might need to add an additional router. Due to the fact that the 2621 is end of life and support, you would be better off just upgrading the existing router to a router that will support your existing customers, and any new customers in the future (Scalability). I would create a new network ID from a subnet perspective because extending the subnet mask to a /23 will require an update to all your customers subnet mask. Depending on how your infrastructure is laid out (distribution layer and access layer) you might need a redesign. Do you have a current network diagram?

Billy
0
 
LVL 3

Assisted Solution

by:kf4zmt
kf4zmt earned 800 total points
ID: 33647215
The router can handle multiple subnets if it has the proper IOS to do trunking.  This would mean that your new subnets that you are going to add are in a different vlan on the switch.  The connection from the switch to the router would need to be a trunk and the router would need to be configured with Ethernet sub-interfaces each running dot1q encapsulation.
0
 

Author Comment

by:dkbeckstrom
ID: 33647333
@rfc1180  I don't have a formal network diagram, but it's pretty simple.

                                                         |-> Cisco 2621(10.1) -|
(DSL1, 2, 3,) -> Peplink Aggregator |                                  |  -> Cisco Switch -> Customers
                                                         |-> Cisco 2621(20.1) -|

This is the basic design I have in mind (if my ascii text translates properly).  I'm just wondering if the additional router is necessary or recommended.

Thanks.
0
 
LVL 24

Accepted Solution

by:
rfc1180 earned 1200 total points
ID: 33647567
You could essentially do what you asking with no issues; I am sure cost is a factor is you can pick a 2621 for barely nothing. As I said, you could just use one 2621 (if you have enough resources) and depending on the switches you have on the network (You essentially could use 802.1q and trunking, if your switches support the technology).  Note, that the 2621 can only handle about 12Mbps of traffic; so for a couple hundred customers, one 2621 might not handle any future growth. Yes, what you have on your simple diagram you can do with no issues.

Billy
0

Featured Post

Don't Cry: How Liquid Web is Ensuring Security

WannaCry is just the start. Read how Liquid Web is protecting itself and its customers against new threats.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For many of us, the  holiday season kindles the natural urge to give back to our friends, family members and communities. While it's easy for friends to notice the impact of such deeds, understanding the contributions of businesses and enterprises i…
This month, Experts Exchange’s free Course of the Month is focused on CompTIA IT Fundamentals.
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
There's a multitude of different network monitoring solutions out there, and you're probably wondering what makes NetCrunch so special. It's completely agentless, but does let you create an agent, if you desire. It offers powerful scalability …
Suggested Courses

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question