chikagoh
asked on
Cisco 1262 AP with Cisco 525G Wireless phones. Getting lots of duplex mismatch messages
Sep 6 17:09:07 EDT: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on FastEthernet0/1/2 (not half duplex), with SIP708105B36528 wlan0 (half duplex).
Is this a problem, if so, how do I fix it?
Is this a problem, if so, how do I fix it?
Yes, this can create issues and communication errors on the network.. Setting both sides to either Full or Half-Duplex should resolve this issue.
Turn CDP off on your WLC - it should be turned off by default.
ASKER
Thanks for the response:
1) I am using WiFi from the phones to the AP, so there is no full/half duplex setting like there is on a wired switch.
2) I am not using a WLC. This is an autonomous AP
Wireless Wireless Wired
C525G Phone ---> C1262 AP ----> C1861 Router
I am getting these CDP messages on the router.
1) I am using WiFi from the phones to the AP, so there is no full/half duplex setting like there is on a wired switch.
2) I am not using a WLC. This is an autonomous AP
Wireless Wireless Wired
C525G Phone ---> C1262 AP ----> C1861 Router
I am getting these CDP messages on the router.
Ok, just disable CDP on the AP then.
ASKER
Not a problem, but to confirm, is there really a duplex issue between the phone and AP?
ASKER
Actually, after disabling CDP on the AP, it is still happening. Looks like the CDP messages are coming from the phone
Hmmm the phone IS half duplex by design, as that's how WiFi works for standard 802.11b/g.
I don't understand how CDP can reach the router if the AP has it turned off!? The AP shouldn't pass the CDP from the phone to the router.
Can you post the config from the AP?
I don't understand how CDP can reach the router if the AP has it turned off!? The AP shouldn't pass the CDP from the phone to the router.
Can you post the config from the AP?
ASKER
I put back the cdp back in because I got a cdp message from my poe router about a power issue which resets the radios. I had no cdp enable on dot0 and dot1, and gig0
XXX_AP#show running-config
Building configuration...
Current configuration : 1765 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname CUPROD_AP
!
logging rate-limit console 9
enable secret 5 $1$owvM$21kcIieLTJ6CFcvLiD ct0/
!
no aaa new-model
!
!
dot11 syslog
!
dot11 ssid XXX
authentication open
authentication key-management wpa
guest-mode
wpa-psk ascii 7 XXX
!
!
!
!
!
bridge irb
!
!
interface Dot11Radio0
no ip address
no ip route-cache
!
encryption mode ciphers tkip
!
ssid XXX
!
antenna gain 0
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
!
interface Dot11Radio1
no ip address
no ip route-cache
!
encryption mode ciphers tkip
!
ssid XXX
!
antenna gain 0
dfs band 3 block
channel dfs
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
!
interface GigabitEthernet0
no ip address
no ip route-cache
duplex full
speed 100
no keepalive
bridge-group 1
no bridge-group 1 source-learning
bridge-group 1 spanning-disabled
!
interface BVI1
ip address XXX 255.255.255.0
no ip route-cache
!
ip default-gateway XXX
ip http server
ip http authentication local
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
bridge 1 route ip
!
!
!
line con 0
line vty 0 4
login local
!
end
XXX_AP#show running-config
Building configuration...
Current configuration : 1765 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname CUPROD_AP
!
logging rate-limit console 9
enable secret 5 $1$owvM$21kcIieLTJ6CFcvLiD
!
no aaa new-model
!
!
dot11 syslog
!
dot11 ssid XXX
authentication open
authentication key-management wpa
guest-mode
wpa-psk ascii 7 XXX
!
!
!
!
!
bridge irb
!
!
interface Dot11Radio0
no ip address
no ip route-cache
!
encryption mode ciphers tkip
!
ssid XXX
!
antenna gain 0
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
!
interface Dot11Radio1
no ip address
no ip route-cache
!
encryption mode ciphers tkip
!
ssid XXX
!
antenna gain 0
dfs band 3 block
channel dfs
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
!
interface GigabitEthernet0
no ip address
no ip route-cache
duplex full
speed 100
no keepalive
bridge-group 1
no bridge-group 1 source-learning
bridge-group 1 spanning-disabled
!
interface BVI1
ip address XXX 255.255.255.0
no ip route-cache
!
ip default-gateway XXX
ip http server
ip http authentication local
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
bridge 1 route ip
!
!
!
line con 0
line vty 0 4
login local
!
end
ASKER
CDP isn't routable, but it can still travel through connected layer2 networks (with or without CDP enabled on a device in the middle) correct?
ASKER CERTIFIED SOLUTION
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