12-06-2013 06:27 AM - edited 03-07-2019 04:57 PM
I have a cisco 881W which seems to have an issue connecting to s 3COM Smart switch. Systems connected to the 3COM would not register an ip address. HOwever if i switch the 3COM to a unmanaged switch, the problems dissapears. I was wondering if there is a configuration that is needed to ensure than the cisco 881W can communicate with a smart switch. The WAM connection is coming from a modem with ADSL
This is my current configuration.
Any help would be gratefull.
version 15.2
!
hostname yourname
!
boot-start-marker
boot-end-marker
!
!
logging buffered 51200 warnings
!
no aaa new-model
!
!
!
ip dhcp excluded-address 10.10.10.51 10.10.10.254
!
ip dhcp pool ccp-pool
import all
network 10.10.10.0 255.255.255.0
default-router 10.10.10.1
dns-server 202.188.0.133 8.8.8.8
lease infinite
!
!
!
ip domain name yourdomain.com
ip name-server 202.188.0.133
ip name-server 8.8.8.8
ip cef
no ipv6 cef
interface FastEthernet0
no ip address
!
interface FastEthernet1
no ip address
!
interface FastEthernet2
no ip address
!
interface FastEthernet3
switchport mode trunk
no ip address
!
interface FastEthernet4
ip address dhcp
ip nat outside
ip virtual-reassembly in
duplex auto
speed auto
!
interface Wlan-GigabitEthernet0
description Internal switch interface connecting to the embedded AP
no ip address
!
interface wlan-ap0
description Service module interface to manage the embedded AP
ip unnumbered Vlan1
!
interface Vlan1
ip address 10.10.10.1 255.255.255.0
ip directed-broadcast
no ip proxy-arp
ip nat inside
ip virtual-reassembly in
ip tcp adjust-mss 1452
!
ip forward-protocol nd
ip http server
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
!
ip nat inside source list 199 interface FastEthernet4 overload
!
access-list 199 permit ip any any
no cdp run
!
!
!
line con 0
login local
no modem enable
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
stopbits 1
line vty 0 4
privilege level 15
login local
transport input telnet ssh
line vty 5 15
access-class 23 in
privilege level 15
login local
transport input telnet ssh
!
scheduler allocate 20000 1000
!
end
12-09-2013 10:02 PM
Hey Julio
Do i do these commands with the switch connected or not, Because if I do it with the switch, I cannot get an IP and thus cannot get these commands and connect to the router. The current set up is cable modem > Switch > Router. The 3Com cannot get an IP from the router. So now ive removed the switch and is connected directly to the router.
12-09-2013 10:09 PM
Hello,
Hey bud you are making things to complicated
So network setup is
Comcast router---3com L2 switch---Router
When you connect the 3com the router does not get an Ip on it's Fa 0/4 interface??
but when you do not have the switch it does??
Is that right???????
Rate all of the helpful posts!!!
Regards,
Jcarvaja
Follow me on http://laguiadelnetworking.com
12-10-2013 01:21 AM
Sorry for making it complicated. But you are absolutely correct. That is the setup.
That is correct. Absoulutely correct. If connected to the Switch i will not get an IP, but if i connect straight to the router, I will get an IP
Any ideas?
Thanks
Bryan Looi
12-10-2013 01:27 AM
Then you are looking on the wrong place.
The issue is within the 3com switch.
Make sure the connection to the modem is up.
Check that both ports on the 3 com are access ports and connect to the same vlan.
That's all bud.
Do remember to rate all of our answers.
Regards
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