05-20-2019 09:52 PM - edited 07-05-2021 10:26 AM
Hi Guys,
The client is getting IPV6 IP Address instead of IPV4 IP Address from the DHCP pool. Please see image below for reference.
Is there a workaround on this issue.
Thank you.
05-20-2019 10:03 PM
HI,
If you are not using IPv6 then you can disable on WLC:
Step 1 : Choose Controller > General.
Step 2 : From the Global IPv6 Config drop-down list, choose Disabled.
Step 3 : Click Apply.
Step 4 : Click Save Configuration.
Also make sure that you put the right DHCP server under dynamic interface which is assigned to Guest wlan.
Regards
Dont forget to rate helpful posts
05-20-2019 10:50 PM - edited 05-20-2019 10:52 PM
Still same issues. Any more areas where I can look into?
Isolate:
IPV6 is disabled
DHCP server under dynamic interface - Configured correctly.
05-20-2019 11:46 PM
FE80 is a link local address, if IPv6 is disabled on the wireless side - check client side that IPv6 is also disabled.
Also confirm that DHCP is working for that SSID for other devices - as i have seen this if the client cant get an IPv4 before.
If AP is in flexconnect check VLAN mapping is correct as this will do it as well
05-21-2019 05:09 AM
05-21-2019 05:31 AM
Hi Leo,
Good catch! Please find below existing config and let me know if I can change and configure a trunk on the following interfaces.
*vlan 50 - management
*vlan 77 - new guest wifi
Please advise if this is correct. Trunk sample config:
!
interface TenGigabitEthernet1/0/41
description **WAP**
switchport trunk allowed 50, 77
switchport mode trunk
!
!!!!!!! existing config !!!!!!!
!
interface TenGigabitEthernet1/0/41
description **WAP**
switchport access vlan 50
switchport mode access
spanning-tree portfast
spanning-tree guard root
!
interface TenGigabitEthernet1/0/42
description **WAP**
switchport access vlan 50
switchport mode access
spanning-tree portfast
spanning-tree guard root
!
!
interface TenGigabitEthernet2/0/41
description **WAP**
switchport access vlan 50
switchport mode access
spanning-tree portfast
spanning-tree guard root
!
interface TenGigabitEthernet2/0/42
description **WAP**
switchport access vlan 50
switchport mode access
spanning-tree portfast
spanning-tree guard root
!
!
interface Port-channel20
description WLC
switchport mode trunk
!
!
interface TenGigabitEthernet1/0/39
description **WLC**
switchport mode trunk
channel-group 20 mode on
!
!
interface TenGigabitEthernet2/0/39
description **WLC**
switchport mode trunk
channel-group 20 mode on
!
Thanks
05-21-2019 05:51 AM
05-21-2019 02:48 PM
Hi Leo,
Please see below config.
CORE-SW#sh vlan
VLAN Name
---- --------------
77 Wireless-Guest-New active
CORE-SW#sh interface Ten 2/0/39 trunk
Port Mode Encapsulation Status Native vlan
Te2/0/39 on 802.1q trunk-inbndl 1
(Po20)
Port Vlans allowed on trunk
Te2/0/39 1-4094
Port Vlans allowed and active in management domain
Te2/0/39 1,10,14,20-21,25-26,30,35,40-41,45,50,55,60,70,77,80,88,90,95,100-101,401
Port Vlans in spanning tree forwarding state and not pruned
Te2/0/39 1,10,14,20-21,25-26,30,35,40-41,45,50,55,60,70,77,80,88,90,95,100-101,401
05-21-2019 06:06 AM
Chekc the ports
See if you correctly configure dthe DHCP server IP
REgards
Dont forget to arte helpful posts
05-21-2019 06:28 PM
05-22-2019 12:18 AM
Check the DHCP pool.
Check the DHCP scope.
Check the dynamic interface and make sure it is pointing to the correct DHCP server.
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