Does 12.2(35) SE5 (3750-IPSERVICES-M) IOS support L3 port-channel?

Unanswered Question
Feb 11th, 2010

I have a stack of 2 3750(E)s with the "c3750-ipservices-mz.122-35.SE5/c3750-ipservices-mz.122-35.SE5.bin" image that will not allow me to assign an ip address to a port-channel interface.  Please help.

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Paolo Bevilacqua Thu, 02/11/2010 - 14:12

L3 port-channel does not exist.


Either assign the IP address to a VLAN that is trunked on the port-channel, or remove port-channel, disable switchport, assing different addresses to the multiple links.


The results will be very similar.

zdrepaul Thu, 02/11/2010 - 14:16

is there another version of IOS that i can download to support an l3 port-channel?  Because it does exist on my other network gear.  i could assign ip addresses to multiple ints creating point-to-point connections, however that's not the most desired way.  thank you.

Jon Marshall Thu, 02/11/2010 - 15:14

p.bevilacqua wrote:


L3 port-channel does not exist.


Either assign the IP address to a VLAN that is trunked on the port-channel, or remove port-channel, disable switchport, assing different addresses to the multiple links.


The results will be very similar.


Paolo


L3 etherchannel does indeed exist. It allows you to bundle multiple physical links into one logical link and then assign an IP address to that logical link -


6500 L3 etherchannel


Jon

Paolo Bevilacqua Thu, 02/11/2010 - 15:18

I should have said, does not exist on the 3750.


Not a big deal considering you have two alternative methods to achieve the same.

Jon Marshall Thu, 02/11/2010 - 15:26

p.bevilacqua wrote:


I should have said, does not exist on the 3750.


Not a big deal considering you have two alternative methods to achieve the same.


Trouble is it does exist on the 3750 -


http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_35_se/configuration/guide/swethchl.html#wp1376182


agree that you could use SVI with L2 access ports but then you are not removing STP from the links.


Jon

Jon Marshall Thu, 02/11/2010 - 15:26

zdrepaul wrote:


I have a stack of 2 3750(E)s with the "c3750-ipservices-mz.122-35.SE5/c3750-ipservices-mz.122-35.SE5.bin" image that will not allow me to assign an ip address to a port-channel interface.  Please help.


Can you post relevant config.


Jon

zdrepaul Thu, 02/11/2010 - 15:36

#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
(config)#int po22
(config-if)#ip address 192.168.125.121 255.255.255.252
                              ^
% Invalid input detected at '^' marker.

(config-if)#ip ?
Interface IP configuration subcommands:
  admission  Apply Network Admission Control
  arp        Configure ARP features
  dhcp       Configure DHCP parameters for this interface
  dhcp       DHCP
  igmp       IGMP interface commands
  verify     verify
  vrf        VPN Routing/Forwarding parameters on the interface

(config-if)#ip

Jon Marshall Thu, 02/11/2010 - 15:37

zdrepaul wrote:


#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
(config)#int po22
(config-if)#ip address 192.168.125.121 255.255.255.252
                              ^
% Invalid input detected at '^' marker.

(config-if)#ip ?
Interface IP configuration subcommands:
  admission  Apply Network Admission Control
  arp        Configure ARP features
  dhcp       Configure DHCP parameters for this interface
  dhcp       DHCP
  igmp       IGMP interface commands
  verify     verify
  vrf        VPN Routing/Forwarding parameters on the interface

(config-if)#ip


I meant could you actually post the config off the switch.


Jon

zdrepaul Thu, 02/11/2010 - 15:39

i don't think the config is going to help us figure this one out; i think it has to with the version of ios the switch is running.

Jon Marshall Thu, 02/11/2010 - 15:39

Have you configured "no switchport" under the port-channel interface ie.


int po22

no switchport

ip address .....


Jon

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