Port Group question

[rdanevich]

Here's the situation:

I have an old 2924XLV connected to an old 5500 switch via 4 access ports like so:

interface FastEthernet0/20

speed 100

duplex full

port group 2

spanning-tree portfast

!

interface FastEthernet0/21

speed 100

duplex full

port group 2

spanning-tree portfast

!

interface FastEthernet0/22

speed 100

duplex full

port group 2

spanning-tree portfast

!

interface FastEthernet0/23

speed 100

duplex full

port group 2

spanning-tree portfast

2924XLV#sh port group

Group Interface Transmit Distribution

----- ---------------- ---------------------

2 FastEthernet0/20 source address

2 FastEthernet0/21 source address

2 FastEthernet0/22 source address

2 FastEthernet0/23 source address

The 5500 is being replaced with a new 4507. How should I configure the 4 ports on the 4507? Currently is this an Etherchannel setup with PAgP?

So should I do something like this for all 4 ports on the 4507?:

interface GigabitEthernet4/3

switchport trunk encapsulation isl

switchport mode trunk

speed 100

duplex full

channel-group 2 mode auto

(note: I know trunking is not enabled on the 2924XLV at this time, I will add switchport mode trunk to the configuration when connecting up the new 4507 switch)

Port-group is NOT an option on the 4507.

Thanks in advance for your input.

[rdanevich]

Where are the Experts????

[sourabhagarwal]

port-group will not be an option in 4507. to bundle links in 4507, you need to configure etherchannel.

hope this URL will answer your queries.

http://www.cisco.com/en/US/products/hw/switches/ps663/products_configuration_guide_chapter09186a00800ddacd.html

rate if it helps ....

[rdanevich]

This I know, hence the question.

Since this is an older switch I don't know what "port-group" means. Is that the early version of "Etherchannel" before it was giving that official name? Will it work? Or is it just plain incompatible?

[sourabhagarwal]

"port group" interface configuration command is used to assign a port to a Fast EtherChannel or Gigabit EtherChannel port group.

check this URL to get more information on this command.

http://cco.cisco.com/univercd/cc/td/doc/product/lan/c2900xl/c2900sa4/sa4cr/macrcli.htm#xtocid1053017

hope to help ... rate if it does ...

[rdanevich]

Not a solid answer but that link does help! Looks like this one will have to be verified with real world experience. Live by the sword! :-)

Thanks for the help amigo!

[amit-singh]

Hi Friend,

Port-group was an older command that we use have on older IOS on 2900/3500Xl's and was on Pagp on default, the cisco proprietry protocol. The new IOS have "port-channel " command on the switches. This command is the same and has the same effect as port-group command. However the configuration has slightly changed on the new IOS. You have to first configure "channel-group " under the physical interfaces on the switch interfaces that you want to bundle.

I think the command that you have on 4500 will be sufficient in your case.

HTH,

-amit singh

[rdanevich]

My thoughts EXACTLY! Thanks for your input!