10-06-2011 06:09 AM - edited 07-03-2021 08:52 PM
Hello !
Side Catalyst 6509 :
cata6#sho running-config interface gigabitEthernet 8/15
Building configuration...
Current configuration : 224 bytes
!
interface GigabitEthernet8/15
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
channel-protocol lacp
channel-group 4 mode active
end
cata6#sho running-config interface gigabitEthernet 8/45
Building configuration...
Current configuration : 224 bytes
!
interface GigabitEthernet8/45
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
channel-protocol lacp
channel-group 4 mode active
end
et
cata6#sho running-config interface port-channel 4
Building configuration...
Current configuration : 149 bytes
!
interface Port-channel4
description vers wificontrol
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
end
Side WLC 4402 :
(Cisco Controller) >show port summary
STP Admin Physical Physical Link Link Mcast
Pr Type Stat Mode Mode Status Status Trap Appliance POE
-- ------- ---- ------- ---------- ---------- ------ ------- --------- -------
1 Normal Forw Enable Auto 1000 Full Up Disable Enable N/A
2 Normal Forw Enable Auto 1000 Full Up Disable Enable N/A
(Cisco Controller) >show lag summary
LAG Enabled
and :
(Cisco Controller) >show mirror ap
AP
-----------------
(Cisco Controller) >show mirror foreignAp
Foreign AP Port
---------------
(Cisco Controller) >show mirror mac
Client MAC Type
----------------- -------
On the web admin interface of the 4402, the 2 ports GigaEthernet are in mirror mode BUT it is not possible to disable (when i click on "apply" it return to enable). Even if i disable the LAG (and i reboot) I CANNOT disable the mirror mode of the 2 ports.
In the config guide it is noted :
"Port mirroring is not supported when link aggregation (LAG) is enabled on the controller"
Yes i agree BUT i cannot disable !!!
The WLAN work apparently good, BUT the traffic is VERY similar across the 2 interfaces (verify by SNMP/rrdtool side catalyst) AND a ping toward the management-interface of the 4402 show a DUP response :
root@net-adm:~# ping wificontrol
PING wificontrol (10.3.254.159) 56(84) bytes of data.
64 bytes from wificontrol (10.3.254.159): icmp_req=1 ttl=64 time=0.393 ms
64 bytes from wificontrol (10.3.254.159): icmp_req=1 ttl=64 time=0.404 ms (DUP!)
64 bytes from wificontrol (10.3.254.159): icmp_req=2 ttl=64 time=0.316 ms
64 bytes from wificontrol (10.3.254.159): icmp_req=2 ttl=64 time=0.323 ms (DUP!)
64 bytes from wificontrol (10.3.254.159): icmp_req=3 ttl=64 time=0.347 ms
64 bytes from wificontrol (10.3.254.159): icmp_req=3 ttl=64 time=0.355 ms (DUP!)
It seems that the traffic is mirrored on the 2 ports !!!
It's not very useful to have the same traffic, instead a sharing between the 2 ports .
WHERE IS MY MISTAKE ???
Thanks a lot for your help.
Regards.
Solved! Go to Solution.
10-06-2011 09:54 AM
Michel,
The WLC does not negotiate a protocol for etherchannel.
So you'll need to issue the follwoing commands under the G8/15 and 8/45
no channel-protocol lacp
channel-group 4 mode on
As for the WLC side, you should be fine if the native is VLAN 1, or if you are tagging the management/ap-manager interface(s)
HTH,
Steve
----------------------------------------------------------------------------------------------------------
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10-06-2011 09:55 AM
Michel,
Stephen is correct. +5 Stephen.. and a native vlan statement is not needed as long as your management and ap-manager interfaces have a vlan assigned to them in the controller
10-06-2011 06:22 AM
Hello Mitchel,
I do not see a native vlan defined or any other vlans at all.
switchport trunk native vlan
10-06-2011 09:54 AM
Michel,
The WLC does not negotiate a protocol for etherchannel.
So you'll need to issue the follwoing commands under the G8/15 and 8/45
no channel-protocol lacp
channel-group 4 mode on
As for the WLC side, you should be fine if the native is VLAN 1, or if you are tagging the management/ap-manager interface(s)
HTH,
Steve
----------------------------------------------------------------------------------------------------------
Please remember to rate helpful posts or to mark the quesiton as answered so that it can be found later.
10-06-2011 09:55 AM
Michel,
Stephen is correct. +5 Stephen.. and a native vlan statement is not needed as long as your management and ap-manager interfaces have a vlan assigned to them in the controller
10-07-2011 12:44 AM
Hello !
I modify this and try again and post the result later.
But i don't undertsand why the ports are in mirror mode ?
Thanks.
10-07-2011 05:05 AM
Hello again !
Good response !
It was the lacp which don't work with the 4402.
I no longer have a duplicate traffic onto the 2 ports and the ping DUP disappear.
But it is always impossible to disable the mirror mode of the 2 ports onto the web user interface of the 4402.
I think for a bug in the GUI.
Thanks a lot and bravo to everybody !
10-07-2011 12:37 AM
Hello !
In fact i am on the default native VLAN : idem for the Giga 8/45 and Giga 8/15
cata6#show interfaces gigabitEthernet 8/15 switchport
Name: Gi8/15
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: down (suspended member of bundle Po4)
Administrative Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
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