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Helpful
4
Replies

Wifi Router Not receiving ip from DHCP

Hello.

I have this network:

RouterWAN(132.66.0.1 on Gi0)==>RouterLAN(VLAN1 10.10.10.10 on Fa0)====>SW2960(10.10.10.1)====SW2960(10.10.10.2)===SW2960(10.10.10.3)====>WifiRouterLAN.

in that scenario my WifiRouterLAN is not getting IP address from my DHCP that configured on my Vlan1 on this Router.

but when i connect the WifiRouter directly to the Fa0  of the Router like this:

RouterWAN(132.66.0.1 on Gi0)==>RouterLAN(VLAN1 10.10.10.10 on Fa0)====>WifiRouterLAN.

the WifiRouterLan is getting IP from the DHCP of this Router. here is the configuration of the Router:

cla-router-wan#show conf
Using 2571 out of 262136 bytes
!
! Last configuration change at 10:22:28 IST Sun Jan 15 2017 by intelwifi
! NVRAM config last updated at 15:56:12 IST Sun Jan 15 2017 by intelwifi
!
version 15.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec localtime
no service password-encryption
!
hostname cla-router-wan
!
boot-start-marker
boot-end-marker
!
!
enable secret level 2 5 $1$AlQ3$4onC/cw8e61dBBRUMjFk20
enable secret 5 $1$JqmW$/81wrQFTm42DiDkSRjR5//
enable password intelwifi
!
no aaa new-model
wan mode ethernet
clock timezone IST 2 0
clock summer-time IDT date Mar 27 2015 2:00 Oct 25 2015 2:00
!
!
!
!
ip dhcp excluded-address 10.10.10.10
!
ip dhcp pool intelwifi
import all
network 10.10.10.0 255.255.255.0
default-router 10.10.10.10
lease infinite
!
!
!
!
no ip domain lookup
ip name-server 132.66.48.2
ip name-server 132.66.32.10
ip name-server 132.66.16.2
ip cef
no ipv6 cef
!
!
!
!
!
!
!
!
crypto pki trustpoint TP-self-signed-2542841576
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-2542841576
revocation-check none
rsakeypair TP-self-signed-2542841576
!
!
crypto pki certificate chain TP-self-signed-2542841576
certificate self-signed 01 nvram:IOS-Self-Sig#2.cer
!
!
username intelwifi privilege 15 secret 5 $1$EInH$G16ve51QVPqRtV1dnibSu.
!
!
controller VDSL 0
!
ip ssh time-out 60
ip ssh source-interface GigabitEthernet0
ip ssh version 2
ip scp server enable
ip rcmd rcp-enable
ip rcmd rsh-enable
ip rcmd remote-host root 132.66.48.2 root enable
ip rcmd remote-host root 132.66.48.2 yosi enable
!
!
!
!
interface ATM0
no ip address
shutdown
no atm ilmi-keepalive
!
interface Ethernet0
no ip address
shutdown
!
interface FastEthernet0
no ip address
spanning-tree portfast
!
interface FastEthernet1
no ip address
spanning-tree portfast
!
interface FastEthernet2
no ip address
spanning-tree portfast
!
interface FastEthernet3
no ip address
spanning-tree portfast
!
interface GigabitEthernet0
ip address dhcp
duplex auto
speed auto
!
interface Vlan1
ip address 10.10.10.10 255.255.255.0
!
ip forward-protocol nd
ip http server
ip http authentication local
ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 dhcp
!
logging trap warnings
logging host 132.66.48.2
!
!
control-plane
!
!
!
line con 0
access-class 187 in
exec-timeout 30 0
login local
no modem enable
line aux 0
access-class 187 in
exec-timeout 30 0
login local
line vty 0 4
access-class 187 in
exec-timeout 30 0
privilege level 15
login local
transport input telnet ssh
!
scheduler allocate 60000 1000
ntp server 132.66.8.7
!
end

WHAT COULD BE MY PROBLEM????

1 Accepted Solution

Accepted Solutions

Hello,

I haven't seen the configuration of the wifi router, so I don' know where the problem is. Enabling spanning tree portfast on all links between the wifi router and might help. Your setup looks like you don't even need spanning tree.

Give it a try, and also post the config of the wifi router.

View solution in original post

4 Replies 4

Hello,

how is your Wifi router connected to the switch ? Try and configure 'spanning-tree portfast' or 'spanning-tree portfast trunk' if the uplink is a trunk port.

Can you post the config of the wifi router ?

There is a "spaning tree portfast" configured on the Fa0 of the Router but no "spaning tree portfast" is configured on the SW2960 ports. On the WifiRouter i don't know yet. You think that configuration can enable Dhcp request packets to reach fhe WifiRouter Lan network?

Hello,

I haven't seen the configuration of the wifi router, so I don' know where the problem is. Enabling spanning tree portfast on all links between the wifi router and might help. Your setup looks like you don't even need spanning tree.

Give it a try, and also post the config of the wifi router.

you were right. i configured spaning tree portfast on all the ports of the SW2960 and it worked.

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