Port-channel configuration 3560X and 2960S
Hello,
I am trying to connect a 2960 swith to 3560X using port channel. I have configred the switches with the following configratuion and connected them with straight ethernet cable, the link came up and then it went int err-disable state. I re-enabled the links and connected them using one cross over cable it connected and remained connected for a whole day in my lab. When I shut down both switches and took them the server room and connected both ports using cross over cable it came up and then went into err-disable state. Bellow is my configuration, can you please point out to me what I am missing: (no VTP domain configured on any of the switches)
------------------2960 configuration----------------------
interface Port-channel1
switchport trunk native vlan 999
switchport mode trunk
interface GigabitEthernet1/0/51
switchport trunk native vlan 999
switchport mode trunk
channel-group 1 mode on
interface GigabitEthernet1/0/52
switchport trunk native vlan 999
switchport mode trunk
channel-group 1 mode on
------------------3560X configuration-------------------------------
interface Port-channel1
switchport trunk encapsulation dot1q
switchport trunk native vlan 999
switchport mode trunk
interface GigabitEthernet0/23
switchport trunk encapsulation dot1q
switchport trunk native vlan 999
switchport mode trunk
channel-group 1 mode
interface GigabitEthernet0/24
switchport trunk encapsulation dot1q
switchport trunk native vlan 999
switchport mode trunk
channel-group 1 mode on
Thank you.
Hi,
Your condig looks good and straightthrough cable should work just fine. Can you do the following:
take the interfaces out of the portchannel
shut the portchannel
shut the interfaces
add the interfaces to the portchannel
"no sh" the PO and test again?
This should bring up the interface and the portchannel
HTH
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The controller's neighbor devices must also be properly configured to support LAG.
â¢Each neighbor port to which the controller is connected should be configured as follows:
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In one of my 6509s I've got a lot of old port channel configs listed that I can't remove. How do I remove them short of clearing the config entirely?
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set port channel 8/7-8 723
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I can't do a "clear port channel" or anything like that.Hi Friend,
I don't think you can remove this commands from configuration till the time you reuse this ports with etherchannel configuration.
The best idea will be copy the configuration from switch and paste it on a notepad and delete these lines and copy from notepad again and paste it on switch and I think this will take care of your issue.
HTH, if yes please rate the post.
Ankur -
ASA5550 port channel configuration ERROR: nameif not allowed on empty etherchannel interface
Hi All,
I am having problem when configure port channel on asa5550
IOS ver asa914-k8.bin also in ver 9.02 and 8.47.
Please let me know how can I solve this problem.
UK-LON-FW(config)# int port-channel 3
UK-LON-FW(config-if)# vlan 245
^
ERROR: % Invalid input detected at '^' marker.
UK-LON-FW(config-if)# nameif secure
ERROR: nameif not allowed on empty etherchannel interface.
UK-LON-FW(config-if)#
here is my interfaces configuration:
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UK-LON-FW(config-if)#Hi Marvin,
Thank you for your answer. I did everything but it did not work. Turn out it is a bug ver 8.45 will let you created the sub logical interface but actually it did not work right. Verson 9.x doesn't let you create more than 2 port channel (limitation of ASA5550 hardware).
https://tools.cisco.com/bugsearch/bug/CSCtq62715/?reffering_site=dumpcr
Also, you can see the 8.4 release notes were you can see that it is not supported:
http://www.cisco.com/c/en/us/td/docs/security/asa/asa84/release/notes/asarn84.html#pgfId-522232
Interface Features
EtherChannel support (ASA 5510 and higher)
You can configure up to 48 802.3ad EtherChannels of eight active interfaces each.
Note You cannot use interfaces on the 4GE SSM, including the integrated 4GE SSM in slot 1 on the ASA 5550, as part of an EtherChannel.
We introduced the following commands: channel-group , lacp port-priority , interface port-channel , lacp max-bundle , port-channel min-bundle , port-channel load-balance , lacp system-priority , clear lacp counters , show lacp , show port-channel . -
Port Channel Issue on Cisco 2960s-24ts
Hi All
Last week at a customer site we installed a 2nd 2960s 24 port switch to form a stack using flexstack cables, and the switch stack is working as expected as I can see a master switch and 2nd switch as a member.
For redundancy / resilience we decided to use port 24 on each switch over copper for trunk uplinks to our core switch. The issue that we're having is I can't ping the switch management address. I can however see the address in the arp table and the edge switch is visible when I run show cdp nei. As a work around I've shutdown one of the ports to the downlink from core to edge in order to ping the management address of the switch which is in vlan 1. I'd like to get the port-channel working on both sides for resilience.
ANY HELP IS APPRECIATED...
Core switch is a WS-C3750G-24TS-1U running software version C3750 Boot Loader (C3750-HBOOT-M) Version 12.2(25r)SEE4, C3750 Software (C3750-IPBASE-M)
Edge switch is a WS-C2960S-24TS-L running software version C2960S Boot Loader (C2960S-HBOOT-M) Version 12.2(53r)SE,C2960S Software (C2960S-UNIVERSALK9-M)
The config on the edge switch which goes to the core is :
interface GigabitEthernet1/0/24
description *****
switchport mode trunk
channel-group 6 mode on
end
interface GigabitEthernet2/0/24
description *****
switchport mode trunk
channel-group 6 mode on
end
interface Port-channel6
description ******
switchport mode trunk
end
The config on the downlink ports from the core to the edge:
interface GigabitEthernet1/0/20
description Edge
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 20 mode on
end
interface GigabitEthernet2/0/20
description Edge
switchport trunk encapsulation dot1q
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shutdown
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Hi everyone, I have dual 6120 interconnects, each of which have two uplink ports. I also have two Catalyst 4900M switches to uplink to. So I plan to configure both 802.1q and 802.3ad on each of the 6120 uplink pairs. My question relates to the physical cabling, bearing in mind ESX will be running on the blades.
Would you cable both the uplink ports on interconnect 1 to switch 1? Or would you cross-connect them to both switch 1 and switch 2?
As per this article I see ESX does not support splitting a port channel across two switches, but I am unsure how the presence of the 6120s affects this. Can anyone suggest the best way of doing the cabling based on the kit I have? Thanks.
http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1001938&sliceId=1&docTypeID=DT_KB_1_1&dialogID=14912551&stateId=1%200%2014916516Hey Simon, let's address this is two parts because there are two layers: server-bound (ESX-6120) and north-bound (6120-Cat4900).
At the ESX end, use the default srcPort in the vSwitch / port group with both 10GbE uplink ports (vmnic0 and vmnic1) set to active (not active/passive). There are no loops in this configuration. On the VNIC (in UCSM) you select trunk port and allow all the VLANs that your vSwitch port groups needs. If you don't use a VLAN for the Service Console/ESXi Management, then make sure you set Native to the correct VLAN in the VNIC to allow untagged traffic down the right path.
At the 6120 you can't explicitly configure a trunk for border ports, they are already set so and when you add VLANs they are added to every border port trunk configuration. You, of course, need to make sure the Cat4900 ports at the other end of the cable have the same trunkport VLAN configuration.
So in summary - set VLANs in vSwitch port groups, VNIC in UCSM and northbound switch.
Now when it comes to port channels, you can only configure two or more border ports as a port channel if they are cabled to the same Cat4900. If you had Nexus 5k/7k northbound then you could use vPC on them to allow "mesh" cabling (ie. one 6120 connects to both Nexus switches). But as you aren't using Nexus you will end up with a configuration as Jeremy explained:
ESX --> vSwitch0 --> srcPort load balancing --> 2 active uplinks --> many port groups
6120-a --> Cat4900-a
6120-b --> Cat4900-b
However, I would still recommend using a couple of border ports in a port channel on each fabric to each Cat4900 because, if you pull out a cable/lose a port, then when that port is re-enabled the existing live traffic is redistributed whereas without the port channel only new traffic will be spread across both links.
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Steve
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Interface port-channel btw N2K and Brocade VDX
Dear all,
I tried to configure a port-channel between a nexus 2K (2FEX) and a brocade VDX (VDX6710).
As you seen below, my configuration :
N2K
Po10
switchport access vlan 200
Eth101/1/6
switchport access vlan 200
channel-group 10 mode active (used LACP)
Eth102/1/6
switchport access vlan 200
channel-group 10 mode active (used LACP)
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Unfortunately, we can't up the link for interfaces and so the port-channel.
We have the next message from the N5K for FEX :
%ETHPORT-5-IF_ADMIN_UP: Interface Ethernet101/1/6 is admin up .
%ETHPORT-5-SPEED: Interface Ethernet101/1/6, operational speed changed to 1 Gbps
%ETHPORT-5-IF_DUPLEX: Interface Ethernet101/1/6, operational duplex mode changed to Full
%ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet101/1/6, operational Receive Flow Control state changed to off
%ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet101/1/6, operational Transmit Flow Control state changed to on
%ETHPORT-5-IF_UP: Interface Ethernet101/1/6 is up in mode access
%ETHPORT-5-IF_DOWN_NONE: Interface Ethernet101/1/6 is down (None)
%ETHPORT-5-IF_DOWN_ERROR_DISABLED: Interface Ethernet101/1/6 is down (Error disabled. Reason:BPDUGuard)
Any idea about the configuration ?
Thanks for your help.
MatthieuFexes are really made to connect hosts and not switches . So the ports should not see bpdu's so bpduguard is err-disabling the ports.
Spanning Tree Protocol
HIFs go down with the BPDUGuard errDisable message
HIFs go down accompanied with the message, BPDUGuard errDisable.
Possible Cause
By default, the HIFs are in STP edge mode with the BPDU guard enabled. This means that the HIFs are supposed to be connected to hosts or non-switching devices. If they are connected to a non-host device/switch that is sending BPDUs, the HIFs become error-disabled upon receiving a BPDU.
Solution
Enable the BPDU filter on the HIF and on the peer connecting device. With the filter enabled, the HIFs do not send or receive any BPDUs. Use the following commands to confirm the details of the STP port state for the port:
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