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Connect two Cisco 2960G Switches with Smartports

knelson99
knelson99 asked
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Last Modified: 2012-05-05
Our main switch is a Cisco 2960G-48TC.  Connected to it via fiber are four Cisco 2960G-24TC switches.  Due to expansion, we added a second Cisco 2960G-48TC next to the main switch.  The vendor that we purchased it from installed the switch and all the tech did to connect the two 2960G-48TC switches together (via ethernet) was to go into smartports and change two of the ports (on each switch) to "Trunk".

I asked about load sharing and he said the smartports would take care of it.  Is this a correct statement and is this the best way to connect the two switches together?

Thanks.
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SouljaSr.Net.Eng
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Top Expert 2011

Commented:
Are you referring to smartport macros? If so, then no, because the macro is nothing but a group of commands that you can apply to an interface. If all he did was place a trunk between the switches than they are just connected together. No load balancing of any sort. What type of load balancing are you trying to accomplish?

Author

Commented:
The vendor accessed the Switch via the web browser and then used the graphical interface to configure the ports.  He basically clicked on the port and changed it to a trunk under the smartport configuration menu.

The main switch should have been ordered as a 96 port to begin with.  Since I ran out of ports and had to add the second switch, I thought it might be beneficial to use more than a 1 GB link between the two switches.  The vendor recommended utilizing  at least two ports and stated I could use as many as I wanted..

If there are benefits to utilizing two (or more) ports, how do I configure the switches?

Thanks.

SouljaSr.Net.Eng
CERTIFIED EXPERT
Top Expert 2011

Commented:
If you have more than 1 link between the switches one is block if you are using spanning tree or the vendor set them up as an etherchannel. Maybe that is what is is referring to as the load balance. The switches will load balance across those two links if they are in fact set up as etherchannels.

Etherchannels are limited to 8 ports to my knowledge.

Author

Commented:
To configure, they went in to the Catalyst 2960 series device manager via the web browser.  They clicked on configure, smartports and then changed the port roles on two of the ports to "Cisco Switch".  They did not do any command line changes to these ports.

So my question is, what do I have? A 2 GB link, two 1 GB links with load balancing, or a 1 GB link with one port blocked?  
SouljaSr.Net.Eng
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Top Expert 2011

Commented:
I never work in the switch gui. Could you post your config? Log into the cli and do:

teminal length 0
sh run

Copy all the config to clipboard and paste it here.
SouljaSr.Net.Eng
CERTIFIED EXPERT
Top Expert 2011

Commented:
If it's etherchannel it is two 1Gb links being load balanced. If no etherchannel then on of the links will definitely be blocked by spanning tree.

Author

Commented:
Here's the config:
Current configuration : 2563 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname ServerRoom2
!
enable secret ..
!
username xxxxx privilege 15 password xxxxxxxxx
no aaa new-model
system mtu routing 1500
ip subnet-zero
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface GigabitEthernet0/1
description Trunk1 to Switch1
switchport mode trunk
macro description cisco-switch
auto qos voip trust
spanning-tree link-type point-to-point
!
interface GigabitEthernet0/2
description Trunk2 to Switch1
switchport mode trunk
macro description cisco-switch
auto qos voip trust
spanning-tree link-type point-to-point
!
interface GigabitEthernet0/3
!
interface GigabitEthernet0/4
description Beverage002
!
interface GigabitEthernet0/5
description 184-Keith1
!
interface GigabitEthernet0/6
description 184-Keith2
!
interface GigabitEthernet0/7
!
interface GigabitEthernet0/8
!
interface GigabitEthernet0/9
!
interface GigabitEthernet0/10
!
interface GigabitEthernet0/11
!
interface GigabitEthernet0/12
!
interface GigabitEthernet0/13
!
interface GigabitEthernet0/14
!
interface GigabitEthernet0/15
!
interface GigabitEthernet0/16
!
interface GigabitEthernet0/17
!
interface GigabitEthernet0/18
!
interface GigabitEthernet0/19
!
interface GigabitEthernet0/20
!
interface GigabitEthernet0/21
!
interface GigabitEthernet0/22
!
interface GigabitEthernet0/23
!
interface GigabitEthernet0/24
!
interface GigabitEthernet0/25
!
interface GigabitEthernet0/26
!
interface GigabitEthernet0/27
!
interface GigabitEthernet0/28
!
interface GigabitEthernet0/29
!
interface GigabitEthernet0/30
!
interface GigabitEthernet0/31
!
interface GigabitEthernet0/32
!
interface GigabitEthernet0/33
!
interface GigabitEthernet0/34
!
interface GigabitEthernet0/35
!
interface GigabitEthernet0/36
!
interface GigabitEthernet0/37
!
interface GigabitEthernet0/38
!
interface GigabitEthernet0/39
!
interface GigabitEthernet0/40
!
interface GigabitEthernet0/41
!
interface GigabitEthernet0/42
!
interface GigabitEthernet0/43
!
interface GigabitEthernet0/44
!
interface GigabitEthernet0/45
!
interface GigabitEthernet0/46
!
interface GigabitEthernet0/47
!
interface GigabitEthernet0/48
!
interface Vlan1
ip address xxx.xxx.xxx.xxxx 255.255.255.0
no ip route-cache
!
ip default-gateway xxxx.xxx.xxx.xxx
ip http server
!
control-plane
!
!
line con 0
line vty 0 4
password xxxxxxx
login
line vty 5 15
password xxxxxx
login
!
end

ServerRoom2#

Author

Commented:
Is there a way to retract that post???

Thanks.
SouljaSr.Net.Eng
CERTIFIED EXPERT
Top Expert 2011

Commented:
No port channels, so one of those links are blocked.
SouljaSr.Net.Eng
CERTIFIED EXPERT
Top Expert 2011

Commented:
I don't see any additional vlan, so they didn't need to make the ports trunks either.

Author

Commented:
If I want to set up two 1-GB links with load balancing on int gi0/1 and int gi0/2, what are the commands I need to put in?

Thanks.
Sr.Net.Eng
CERTIFIED EXPERT
Top Expert 2011
Commented:
This one is on us!
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Author

Commented:
I got sidetracked on another project.  Will work on this again tomorrow.

Thanks.

Author

Commented:
Etherchannel is up and running.  Thanks for your help.

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