not able to configure EtherChannel on

att-sgcops · ‎06-07-2006

I tried to configure EthernChannel on Cat2948 L3 switch, but failed. Not sure it is because of the limitation of the paltform or configuration problem, I post the "show version" and "show config" here:

sw#sh ver

Cisco Internetwork Operating System Software

IOS (tm) L3 Switch/Router Software (CAT2948G-IN-M), Version 12.0(25)W5(27b) RELEASE SOFTWARE

Compiled Tue 11-May-04 18:45 by integ

Image text-base: 0x60010928, data-base: 0x6060A000

ROM: System Bootstrap, Version 12.0(7)W5(15) RELEASE SOFTWARE

sw-sgdc-3rdflr uptime is 1 year, 27 weeks, 5 days, 7 hours, 31 minutes

System restarted by power-on at 02:31:36 UTC Fri Nov 26 2004

System image file is "bootflash:cat2948g-in-mz.120-25.W5.27b.bin"

cisco Cat2948G (R5000) processor with 49152K/16384K bytes of memory.

R5000 processor, Implementation 35, Revision 2.1

....

show config (configuration is the same for all the interface):

interface FastEthernet1

no ip address

no ip directed-broadcast

bridge-group 1

interface BVI1

ip address 10.10.10.1 255.255.255.0

no ip directed-broadcast

And if i want to add 1 more connection to implement load-sharing, how to do that?

vladrac-ccna · ‎06-07-2006

Just curious, do you really need bridging in this network?

your post title states etherchannel ?

where are these configs?

anyway check the following link for etherchannel configs for CAT2948

http://www.cisco.com/warp/public/473/172.html#configs

HTH,

if it does please rate this post.

vlad

att-sgcops · ‎06-07-2006

is it because of the bridging, that i am not able to config EtherChannel? It was configured by someone else and I don't want to change that. there are only 1 vlan on that.

devang_etcom · ‎06-07-2006

when confiugrin make sure that your all port should have same characteristics like duplex speed and i think your all ports should be in the same VLAN. so first of all check it out that.

rate this post if it helps

regards

Devang

vladrac-ccna · ‎06-08-2006

Hello,

there's no problem to put bridge-group on your configuration.

Please take a look on the link I've posted, you'll see etherchannel using bridge-group.

But again, could you give us the complete etherchannel configuration?

to have etherchannel running you need similar configs in all the interfaces under the same channel-group (in both switches), assuming that you are using a etherchannel to link 2 switches together.

Please give us more information about your actual problem and configs.

and dont forget to rate any helpful posts (grades range from 1 to 5 - from not helpful to really helpful).

Vlad

"!--- Configure a logical interface for the EtherChannel.

interface Port-channel1

no ip address

no ip directed-broadcast

hold-queue 300 in

!

!--- Create a subinterface for each VLAN on the port channel.

!

interface Port-channel1.1

!--- Specify the encapsulation and VLAN number.

encapsulation dot1Q 1

no ip redirects

no ip directed-broadcast

!--- Add the subinterface to the appropriate bridge group.

!--- All the interfaces (and subinterfaces) that belong to the

!--- same VLAN (network or subnet) should be configured to fall

!--- in the same bridge group.

bridge-group 1

!

!--- Configure a subinterface for the second VLAN.

!--- This procedure must be repeated for every VLAN.

!

interface Port-channel1.2

encapsulation dot1Q 2

no ip redirects

no ip directed-broadcast

bridge-group 2

!

!--- Configure a subinterface for the native VLAN.

!

interface Port-channel1.99

encapsulation dot1Q 99 native

no ip redirects

no ip directed-broadcast

!--- Note in this case you do not put any bridge group

!--- statements under this subinterface. A dummy VLAN has been chosen

!--- as the native VLAN on which you do not put any traffic,

!--- so there is no need to have this routed.

!

interface FastEthernet1

no ip address

no ip directed-broadcast

!--- Configure the port to channel 1.

channel-group 1

!

interface FastEthernet2

no ip address

no ip directed-broadcast

!--- Configure the port to channel 1.

channel-group 1

!

interface FastEthernet3

no ip address

no ip directed-broadcast

!--- The device connected on this interface belongs

!--- to the same subnet (VLAN 1) as subinterface 1 on

!--- the port channel, so this interface has to be added to

!--- bridge-group 1.

bridge-group 1

!

!--- If there are any other interfaces that belong to

!--- the same VLAN (subnet), they all have to be added to

!--- the respective bridge group.

( .... Output is suppressed)

!

! a routed interface for bridge-group 1

interface BVI1

ip address 1.1.1.1 255.255.255.0

no ip directed-broadcast

no ip route-cache cef

!

! a routed interface for bridge-group 2

interface BVI2

ip address 2.2.2.1 255.255.255.0

no ip directed-broadcast

no ip route-cache cef

"

Roberto Salazar · ‎06-07-2006

Hello,

Usually, when you channel two or more interfaces, is because you are connecting those interface to another switch. With your example above, it looks like you have a fastethernet that you might be connecting to a host, channeling will not work and it's not for that purpose, if however, I am wrong with my assumption, the following link should help you configure it:

http://www.cisco.com/univercd/cc/td/doc/product/l3sw/2948g-l3/rel_12_0/7wx515a/config_g/ether_ch.htm

Remember this is a router/bridge device not a switch like Cat2948G or Cat4000.

Please rate helpful post.