Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Cisco 2948G-L3

Posted on 2004-09-28
9
Medium Priority
?
2,353 Views
Last Modified: 2008-03-17
We needed a layer 2/3 switch. Because of costs i didn't have a large budget so i ordered a 2948G-L3. The office need decent Layer 2 switching and route between 2 or 3 VLAN's, nothing crazy.

We haven't received this yet, but have started to do some researched and noticed that this switch is sort of an "odd ball".

1) It doesn't run VTP.
2) It uses Bridging.
3) Performance isn't that great.

Am I screwed? Can i run VTP? Can i use Vlans instead of putting interfaces in a bridge-group? Briding is a pain. I've also heard that this switch is really just a 48 port router...is this true. I need some reasurance that this will work out.

Thanks for you help.
0
Comment
Question by:AaronLeiberman
[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
9 Comments
 
LVL 79

Expert Comment

by:lrmoore
ID: 12170672
It will work out. You're right, it does not support VTP, but you can manually assign vlans, and yes, you have to setup bridge groups and BVI interfaces instead of assigning interfaces to vlans and using a vlan interface.

Here's some supporting documents:
http://www.cisco.com/en/US/products/hw/switches/ps607/products_configuration_example09186a008014c203.shtml

0
 
LVL 79

Expert Comment

by:lrmoore
ID: 12170692
0
 
LVL 43

Expert Comment

by:JFrederick29
ID: 12171273
In addition to the links lrmoore posted, here is a configuration example:

Instead of creating VLAN's and SVI's to route between the VLAN's you use bridge-groups for layer 2 and BVI's for layer 3.  For example, say you wanted fa0/1 and fa0/2 to be in vlan (bridge-group) 2, you would use the following config:

bridge irb <---enable integrated routing and bridging

interface fastethernet1
bridge-group 2

interface fastethernet2
bridge-group 2

Then if you wanted to route between VLAN's (bridge-groups), you would create BVI's and assign the layer 3 addresses.

interface bvi1
ip address 192.168.0.1 255.255.255.0

interface bvi2
ip address 192.168.1.1 255.255.255.0

Lastly, you need to enable bridging and routing for each bridge group:

bridge 1 protocol ieee
bridge 1 route ip

bridge 2 protocol ieee
bridge 2 route ip
0
Looking for a new Web Host?

Lunarpages' assortment of hosting products and solutions ensure a perfect fit for anyone looking to get their vision or products to market. Our award winning customer support and 30-day money back guarantee show the pride we take in being the industry's premier MSP.

 

Author Comment

by:AaronLeiberman
ID: 12172175
What binds the bvi to the bridge-group is it the bvi# to bridge #?
0
 

Author Comment

by:AaronLeiberman
ID: 12172192
can i run .1q trunks? or do i need to run ISL and create the subinerface for each vlan or bridge-group. then create bridge-group 1 on each switch.

can i create etherchannel to aggregate interfaces?

0
 
LVL 79

Expert Comment

by:lrmoore
ID: 12172403
>can i create etherchannel to aggregate interfaces?
Did you even read the first link I posted:
"Configuring EtherChannel and Trunking Between Catalyst 2950 and 2948G-L3/4908G-L3 Switches"

Yes, you can use dot1q
0
 
LVL 1

Expert Comment

by:z71mike8379
ID: 12176836
Aaron, if you don't mind me asking......how much did you pay for that switch?

I'd be interested in a cost comparison with a 3550 or 3750 option.
0
 

Author Comment

by:AaronLeiberman
ID: 12212850
I paid about $2000 for a 2948G-L3.
0
 
LVL 79

Accepted Solution

by:
lrmoore earned 2000 total points
ID: 12221343
Do you need any more help on this? Still working out the kinks?
0

Featured Post

Enroll in September's Course of the Month

This month’s featured course covers 16 hours of training in installation, management, and deployment of VMware vSphere virtualization environments. It's free for Premium Members, Team Accounts, and Qualified Experts!

Question has a verified solution.

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

I had an issue with InstallShield not being able to use Computer Browser service on Windows Server 2012. Here is the solution I found.
Make the most of your online learning experience.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …
Suggested Courses

688 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