LAG doesn't work - wlc 5508

[yeopaul]

Hi gurus,

I am using the startup utility to configure LAG on a 5508 to connect to 3560G switch. i have tried to use 7.0, 7.4, 7.5 but I just can't get it up, however I can get it connected using access port. I notice the light on the first port is always off, i can't find an option to configure the STP on the wlc 5508, i tried to follow the documentation but to no avail, I would really appreciate help here. Thanks a lot.

I have the below on the switch :

interface Port-channel32

description LAG port connected to BA-C-WLC03

switchport trunk encapsulation dot1q

switchport trunk native vlan 30

switchport mode trunk

spanning-tree portfast

!

interface GigabitEthernet0/1
switchport trunk encapsulation dot1q
switchport trunk native vlan 30
switchport mode trunk
channel-group 32 mode on
spanning-tree portfast

and the WLC 5508:

Port Summary
           STP   Admin   Physical   Physical   Link   Link
Pr  Type   Stat   Mode     Mode      Status   Status  Trap     POE    SFPType

-- ------- ---- ------- ---------- ---------- ------ ------- ------- ----------
1  Normal  Disa Enable  Auto       Auto       Down   Enable  N/A     1000BaseTX

2  Normal  Forw Enable  Auto       1000 Full  Up     Enable  N/A     1000BaseTX

3  Normal  Forw Enable  Auto       1000 Full  Up     Enable  N/A     1000BaseTX

4  Normal  Forw Enable  Auto       1000 Full  Up     Enable  N/A     1000BaseTX

Interface Name................................... management

MAC Address...................................... a4:93:4c:b0:93:2f

IP Address....................................... 10.200.130.11

IP Netmask....................................... 255.255.255.224

IP Gateway....................................... 10.200.130.1

External NAT IP State............................ Disabled

External NAT IP Address.......................... 0.0.0.0

VLAN............................................. untagged

Quarantine-vlan.................................. 0

Active Physical Port............................. LAG (13)

Primary Physical Port............................ LAG (13)

Backup Physical Port............................. Unconfigured

DHCP Proxy Mode.................................. Global

Primary DHCP Server.............................. 10.200.102.21

Secondary DHCP Server............................ Unconfigured

DHCP Option 82................................... Disabled

IPv4 ACL......................................... Unconfigured

IPv6 ACL......................................... Unconfigured

mDNS Profile Name................................ Unconfigured

AP Manager....................................... Yes

Guest Interface.................................. No
Interface Name................................... management
MAC Address...................................... a4:93:4c:b0:93:2f
IP Address....................................... 10.200.130.11
IP Netmask....................................... 255.255.255.224
IP Gateway....................................... 10.200.130.1
External NAT IP State............................ Disabled
External NAT IP Address.......................... 0.0.0.0
VLAN............................................. untagged
Quarantine-vlan.................................. 0
Active Physical Port............................. LAG (13)
Primary Physical Port............................ LAG (13)
Backup Physical Port............................. Unconfigured
DHCP Proxy Mode.................................. Global
Primary DHCP Server.............................. 10.200.102.21
Secondary DHCP Server............................ Unconfigured
DHCP Option 82................................... Disabled
IPv4 ACL......................................... Unconfigured
IPv6 ACL......................................... Unconfigured
mDNS Profile Name................................ Unconfigured
AP Manager....................................... Yes
Guest Interface.................................. No

[Scott Fella · Accepted solution]

Your sfp's working fine?  I would just connect one port at a time and test... so for example... connect only wlc port 1 to i'm guessing GE0/2 and see if that works.  Then disconnect that and only connect wlc port 2 to GE0/3 and so on.  Just doesn't seem right unless it something wrong with the switch.

Thanks,

Scott

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[yeopaul]

Hi Scott,

Thanks much for painstakingly trying to help me, I really appreciate it.

You are right, your answer " unless it is something wrong with the switch" help me, I get a 2960, channel up the 2 gig port, trunk to a 1841. it works!!

I just can't believe i have 2 production switch - 4500 & 3560 having problem!

thanks a lot.

[Scott Fella · Accepted solution]

Okay... as long as you can test everything out on the switch side it would be easier... as I have to assume things are all working.  The thing is, you can setup the switch ports all in a etherchannel and connect only one port on the WLC and it should work.  Now if you connect two and it fails, then we hav an issue somewhere. 

Can you post your show run-config no ap

Thanks,

Scott

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[yeopaul]

Hi Scott,

attached the 2960 & 1841 config.

Thanks again!

[Scott Fella]

Is this vlan 30 new?  Can you put the WLC in an existing vlan that has been working and test from there.

Thanks,

Scott

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[Yahya Jaber · Accepted solution]

Hi,

Disable LAG, and connect to a single trunk switch port, would port 1 go up?

also, you can check the switch port statistics if there are any packets from the WLC port 1.

[yeopaul]

Hi Yahya,

Yes, the port comes up using trunk or access.

           STP   Admin   Physical   Physical   Link   Link
Pr  Type   Stat   Mode     Mode      Status   Status  Trap     POE    SFPType

-- ------- ---- ------- ---------- ---------- ------ ------- ------- ----------
1  Normal  Forw Enable  Auto       1000 Full  Up     Enable  N/A     1000BaseTX

(Cisco Controller) >ping 10.200.130.1

Send count=3, Receive count=3 from 10.200.130.1

BA-1F-C-CS01(config-if)#BA-1F-C-CS01(config-if)#switchport trunk encap dot1
BA-1F-C-CS01(config-if)#switchport mode trunk
BA-1F-C-CS01(config-if)#switch trunk nativ vlan 30

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.200.130.11, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
BA-1F-C-CS01(config-if)#

[yeopaul]

Hi Yahya,

Thanks for helping. the problem with port1 is coming from the switch.

Thanks a lot.