?
Solved

Cisco 3550 smi routing

Posted on 2004-09-25
8
Medium Priority
?
379 Views
Last Modified: 2010-04-10

Hello

Looking for some configuration tips on a couple of 3550 smi switches. I currently have production PLC and PC devices on the switches and am looking to segment them into 2 networks but they need to talk between a single server. I have been looking at Ciscos configurations and was wondering if anyone can tell me if I have to put an IP address at each interface or just the vlan them interface belongs to? Any other tips would be appreciated. since the switches are smi they only support static and rip routing? 1 switch is running Version 12.1(13)EA1a and the other is Version 12.1(12c)EA1. In total I have 6 of the 3550 on this lan but only need to segment and route between the 2. Thanks in advance.

JF
0
Comment
Question by:Jffishbones
[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
  • 3
  • 3
  • 2
8 Comments
 
LVL 5

Expert Comment

by:netspec01
ID: 12150885
You need to put an address on the VLAN interface only, not each interface.
0
 
LVL 5

Expert Comment

by:netspec01
ID: 12151325
If you sick with the standard image you will need another layer 3 device to perfrom intervlan routing.  This could be another L3 switch or a router.  Connecting a router to a switch to perform this function is called "router on a stick".  This can be done with or without trunks.  

http://www.cisco.com/en/US/products/hw/switches/ps679/products_configuration_guide_chapter09186a008007d1b7.html#39627
provides configuration examples for intervlan routing with a layer 2 switch.

Beware that router on a stick can be a performance bottleneck.  L3 switching with the enhanced image will provide the best performance.

If you upgade to the enhanced image you can do layer 3 switching:
http://www.cisco.com/warp/public/473/howto_L3_intervlanrouting.html
0
 
LVL 43

Accepted Solution

by:
JFrederick29 earned 1000 total points
ID: 12151680
The SMI version of the 3550 provides multilayer switching.  You do NOT need an external router for inter-vlan routing.

To route between VLAN's, simply create the VLAN's:

en
conf t
vlan 2

Next, assign IP addresses to the VLAN interfaces (SVI):

en
conf t
int vlan1
ip address 192.168.1.1 255.255.255.0
no shut

int vlan 2
ip address 192.168.2.1 255.255.255.0
no shut

You need to also enable "IP routing" as it is disabled by default:

en
conf t
ip routing

You should at that point be routing between the two VLAN's/Subnets.  Make sure the default gateway on the end systems is configured for the appropriate VLAN interface IP address.
0
Four New Appliances. Same Industry-leading Speeds.

But don't take it from us.  The Firebox M370 is Miercom tested and Miercom approved, outperforming its competitors for stateless and stateful traffic throughput scenarios.  Learn more about the M370, M470, M570 and M670 and find the right solution for your organization today!

 
LVL 5

Expert Comment

by:netspec01
ID: 12152032
I stand corrected.  The SMI version added intervlan routing starting with 12.1(11)EA1:

http://www.cisco.com/en/US/tech/tk389/tk815/technologies_configuration_example09186a008019e74e.shtml

Give JFrederick29 the points!
0
 

Author Comment

by:Jffishbones
ID: 12152733
Is it necessary to turn on IP routing on all switches on Lan or just the 2 switches where my Vlan 4 needs to talk to Vlan 1.
Also, I do not understand the default gatewey. Devices on Vlan 1 have the router for gateway. Do I change all devices on this vlan to point to vlan IP address for gateway. And does Vlan 4 devices use Vlan 4 ip address as gateway? Thanks in advance
0
 
LVL 43

Expert Comment

by:JFrederick29
ID: 12154334
You can leave the VLAN 1 devices using the router for the gateway but the router will need a static route to the VLAN 4 subnet using the 3550 as the next hop.  The VLAN 4 devices should use the VLAN 4 interface IP address as their default gateway.
0
 

Author Comment

by:Jffishbones
ID: 12155844
Thanks JFrederick29.
0
 

Author Comment

by:Jffishbones
ID: 12156533
Jfrederick29
Thanks for the help. Everything seams to be working well for the 3550 I enabled IP routing on but I was curious, I have
another 3550 that will have ports on Vlan 4, will I need to enable routing on this switch as well or will the first 3550 handle all intervlan routing for Vlan 4 no matter what switch traffic is coming from, I did put the static route in the router to point to vlan 4.
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

When it comes to security, there are always trade-offs between security and convenience/ease of administration. This article examines some of the main pros and cons of using key authentication vs password authentication for hosting an SFTP server.
In this article, I am going to show you how to simulate a multi-site Lab environment on a single Hyper-V host. I use this method successfully in my own lab to simulate three fully routed global AD Sites on a Windows 10 Hyper-V host.
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…
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…
Suggested Courses
Course of the Month12 days, 20 hours left to enroll

777 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