07-19-2007 07:11 AM - last edited on 03-25-2019 03:55 PM by ciscomoderator
Hello we are installing Vmware in our network and I need setup trunking of the ports for VLAN tagging. However i am unable to ping the interfaces of the server. Can someone please verify my config.
07-19-2007 07:40 AM
Change the channel-groups to mode 'on'.
If the VMWare NIC supports LACP, then you can use mode 'active'.
Your current mode is 'auto' and it expects the other end to have 'desirable' which is Cisco's PAgP.
07-19-2007 08:55 AM
According to the Vmware engineer it should be set to auto for the VLAN tagging. Not sure if the NIC supports LACP, however I can't ping the NIC interface on the server.
07-19-2007 11:45 AM
The channel-group on the cisco side is not for Vlan tagging but to denote the etherchanneling mode.
I wouldn't argue with a VMWare engineer on how to configure their products, but you are asking for Cisco configuration help and I'm giving it to you.
If you want some written explanation, feel free to read:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3560/12237se/scg/swethchl.htm#wp1275779
As for pinging the server NIC, I don't see any Layer3 information on the config you posted but you should be able to ping since the ports are in forwarding mode and up/up - just not bundled on a channel.
I see you have vlan 1,20,21,25 on the trunks, do you have the same vlans created in the VMWare server ?
What Vlan are you trying to ping ?
Can you post the 'show vlan' and 'show ip int brief' from the switch ?
07-19-2007 11:51 AM
I thank you for all your assistance the VLAN thatthe server is on is 21, VLAN 25 is the iCSI connection. So from your standpoint all is well and it doesn't have to be bundled.
07-19-2007 12:06 PM
Bundling is for aggregation purposes, you can still connect via one link and shouldn't affect your ping process.
Can you please post the output I requested in the previous post ?
07-19-2007 01:50 PM
07-19-2007 06:37 PM
Thanks for posting the information I requested. Vlan25 does not contain any L3 information, is that one of the Vlans you are trying to ping ?
What address are you trying to ping and where are you pinging from ?
Can you also post the command from 'show int trunk' ?
07-20-2007 03:28 AM
07-20-2007 06:02 AM
The Cisco side looks fine. Vlans are created in L2 and L3 - they are being forwarded via the trunk interfaces w/o problems.
I believe the problem is at the VMWare side.
If you have another switch, you can verify your trunking is fine. Connect the switch to one of those ports and create Vlans 20,21,25 on that switch, then a SVI for Vlan 21 - assign an IP and you will be able to ping across the trunk (switch-to-switch).
07-20-2007 06:40 AM
Thank you i have a problem when i just have one port in the trunk/channel-group it works fine but when i add the others i get this error.
Jul 20 14:19:40.347: %EC-SP-5-CANNOT_BUNDLE2: Gi13/36 is not compatible with Gi12/36 and will be suspended (vlan mask is different)
Jul 20 14:19:40.767: %EC-SP-5-CANNOT_BUNDLE2: Gi13/37 is not compatible with Gi12/36 and will be suspended (vlan mask is different)
Jul 20 14:19:41.179: %EC-SP-5-CANNOT_BUNDLE2: Gi13/38 is not compatible with Gi12/36 and will be suspended (vlan mask is different)
Jul 20 14:19:47.367: %SYS-5-CONFIG_I: Configured from console by drutledge onvty3 (10.1.15.64)
Jul 20 14:21:29.060: %EC-SP-5-CANNOT_BUNDLE2: Gi13/33 is not compatible with Gi12/36 and will be suspended (flow control send of Gi13/33 is on, Gi12/36 is off)
Jul 20 14:21:29.260: %EC-SP-5-CANNOT_BUNDLE2: Gi13/34 is not compatible with Gi12/36 and will be suspended (flow control send of Gi13/34 is on, Gi12/36 is off)
Jul 20 14:21:29.460: %EC-SP-5-CANNOT_BUNDLE2: Gi13/35 is not compatible with Gi12/36 and will be suspended (flow control send of Gi13/35 is on, Gi12/36 is off)
Jul 20 14:21:31.115: %SYS-5-CONFIG_I: Configured from console by drutledge onvty3 (10.1.15.64)
Jul 20 14:22:47.558: %EC-SP-5-CANNOT_BUNDLE2: Gi13/33 is not compatible with Gi12/36 and will be suspended (flow control send of Gi13/33 is on, Gi12/36 is off)
Jul 20 14:22:47.762: %EC-SP-5-CANNOT_BUNDLE2: Gi13/34 is not compatible with Gi12/36 and will be suspended (flow control send of Gi13/34 is on, Gi12/36 is off)
Jul 20 14:22:47.970: %EC-SP-5-CANNOT_BUNDLE2: Gi13/35 is not compatible with Gi12/36 and will be suspended (flow control send of Gi13/35 is on, Gi12/36 is off)
07-20-2007 06:58 AM
When you bundle ports, they must be identical in configuration.
What channel-group mode are you configuring the ports under ?
Can I see your latest config ?
07-20-2007 07:04 AM
07-20-2007 07:14 AM
Can you type
show mod
along with
show int GigabitEthernet12/36 thru /38
and GigabitEthernet13/33 thru /35.
I recommend removing the spanning-tree portfast from those ports.
07-21-2007 04:35 AM
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