11-29-2007 12:29 PM - edited 07-03-2021 03:01 PM
I am trying to get a controller to work on my network. output from the switch arp table.
Internet 172.28.227.2 0 001b.d5cf.79c0 ARPA Vlan103
Internet 172.28.227.1 - 001c.b1ad.7400 ARPA Vlan103
Internet 172.28.227.12 0 001d.a1cc.b7f8 ARPA Vlan103
controller config:
Interface Name................................... management
MAC Address...................................... 00:07:0e:25:ac:a0
IP Address....................................... 172.28.227.2
IP Netmask....................................... 255.255.255.0
IP Gateway....................................... 172.28.227.1
VLAN............................................. 103
Physical Port.................................... 1
Primary DHCP Server.............................. 172.28.224.1
Secondary DHCP Server............................ Unconfigured
DHCP Option 82................................... Disabled
ACL.............................................. Unconfigured
AP Manager....................................... No
The switch see's it but i can not ping or access it via web or telnet. please help!!!!!!!!
11-29-2007 03:15 PM
Is the switch interface configured to be a trunk?
interface FastEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
no shut
11-29-2007 04:00 PM
The switchport is configured as:
interface GigabitEthernet7/48
description Connection to WLC-2100
switchport
switchport access vlan 103
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 103
switchport mode trunk
no ip address
GigabitEthernet7/48 unassigned YES unset up up
i also got this from debugging the wlc.
(LON-WLC-2106) >debug qThu Nov 29 15:44:39 2007: dtlArpSetDefGw: Send an event to DTl ARP to Set Default GW
Thu Nov 29 15:44:39 2007: dtlArpFind: ARP Lookup failed on IP 172.28.227.1
Thu Nov 29 15:44:39 2007: dtlArpFind: ARP Lookup failed on IP 172.28.227.1
Thu Nov 29 15:44:39 2007: dtlArpTask: Unable to complete GW ARP processing, starting a retry timer.
12-03-2007 07:05 PM
you should configure the management interface to untagged "0" and set the switchport to switchport trunk native vlan 103.
02-26-2013 07:50 AM
I had the same issue with a 2504 controller and Scott's recommendation fixed it.
Great job, Scott.
Cisco should clarify their startup guide to account for this.
02-26-2013 12:59 PM
When the management interface is part of VLAN x
Make sure that the management interface vlan id is set to 0 (untagged ) If the native vlan on the switch trunk connected to controller is vlan x. If the native vlan is something else make sure to tag the mangement interface vlan with x.
Another interesting thing that might happen with switch having the following command enabled:
SW(config)#dot1q tag native
In that case all trunk native vlan frames will be tagged , so you have to tag the management vlan on the controller as well in that case.
To be able to troubleshoot such connectivity problem, you should get the output of:
show run int
show interface <\\ > switchport
the latter command should be your best friend.
One recommondation, make sure to tag your management / ap-manager interface with vlan id to maintain QoS limiting based on dot1p values for downstream traffic from the wired side.
In the above scenario , If you can provide the output of show interface <\\> switchport
I should tell you why the recommended action solved your issue based on the above explanation, and if you would like I can maitain the tag for you.
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