07-24-2007 07:30 AM - edited 03-05-2019 05:27 PM
Hello,
I have a 4948, which is new for us, and I want to create a vlan with two ports channel-grouped together to increase the bandwidth back to a 6506. I have two vlans on the 4948 and the second one is private with 12 ports added into it. The problem is once I create the channelgroup on the 4948 it doesn't belong to the Vlan1 anymore. I cannot add either the portchannel or the actual interfaces to access the vlan.
I know this is probably stupid but if anyone can help me I would appreciate it.
Thanks
Solved! Go to Solution.
07-24-2007 09:45 AM
You need to go into the port-channel interface and issue the command switchport, as well.
07-24-2007 07:51 AM
Can we see the config ?
If seems like the port is changing from Layer2 mode to Layer3.
07-24-2007 08:58 AM
07-24-2007 09:21 AM
William
Are you just trying to have a layer 2 etherchannel from your 4948 back to your core switch.
If so
interface GigabitEthernet1/1
no switchport
no ip address
speed 1000
duplex full
channel-group 1 mode auto
!
interface GigabitEthernet1/2
no switchport
no ip address
speed 1000
duplex full
channel-group 1 mode auto
You need to change each interface above to be a switchport
eg.
int gi1/1
switchport
int gi1/2
switchport
Once you've done this you should be able to allocate them into a vlan.
Also if you are using auto at this end make sure it is set to desirable or on at the other end or the channel won't form.
HTH
Jon
07-24-2007 09:33 AM
Hello,
Thanks for your response...
The issue is now I'm back to my original issue. I cannot type channel-group on the interfaces in question after setting them to switchport. How do I channel-group the interface if I set it to switchport?
07-24-2007 09:38 AM
Do you mean that you go into
config t [enter]
interface GigabitEthernet1/1 [enter]
you can't type
channel-group 1 mode on
?
07-24-2007 09:40 AM
This is the message I get...
Command rejected (Port-channel1, Gi1/1): Either port is L2 and port-channel is L
3, or vice-versa
07-24-2007 09:45 AM
You need to go into the port-channel interface and issue the command switchport, as well.
07-24-2007 09:32 AM
As Jon stated, if you want to proceed with any Layer2 task such as Vlan membership, you need to change the port default behavior from Layer3 to Layer2 with the switchport command.
Currently, your ports are in Layer3 mode (default) and you are only allowed to enter IP address information.
07-24-2007 09:42 AM
Hello,
If I understand you correctly you are saying that I am not able to group ports together for improved bandwidth and then add them to Vlans?
07-24-2007 09:47 AM
Etherchanneling will provide bandwidth aggregation and you are doing the right thing. However, your initial query stated you want to assign Vlans on those ports, therefore you need to convert those ports from Layer3 ports to Layer2 ports.
The switchport command does that for you.
07-24-2007 09:51 AM
William,
As stated by Edison, you can use the switchport command under the port-channel interface.You can also remove the interface port-channel that got created when you configured the ether-channel on the ports and when you configure the etherchannel on L2 ports it will also get added as l2 only.
Do this:
Config t
no interface port-channel
default interface gig 1/1
default interface gig 1/2
Then,
interface gig 1/1
switchport mode access
switchport access vlan 1
channel-group 1 mode on
interface gig 1/2
switchport mode access
switchport access vlan 1
channel-group 1 mode on
HTH,Please rate if it does.
-amit singh
07-24-2007 09:52 AM
Hello,
I appreciate all the answers on this post...
I see where I have gone wrong and it is I didn't type switchport on the portchannel interface. When I do that I am able to channelgroup the ports as I hoped to.
Thanks for all the help :)
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