Solved

Cisco 2948G-L3

Posted on 2004-09-28
9
2,348 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
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
VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

 

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

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

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

Suggested Solutions

Short answer to this question: there is no effective WiFi manager in iOS devices as seen in Windows WiFi or Macbook OSx WiFi management, but this article will try and provide some amicable solutions to better suite your needs.
Meet the world's only “Transparent Cloud™” from Superb Internet Corporation. Now, you can experience firsthand a cloud platform that consistently outperforms Amazon Web Services (AWS), IBM’s Softlayer, and Microsoft’s Azure when it comes to CPU and …
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…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

816 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

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now