Utilising an 857W Router for Wireless only

Odd question, but I wonder if I could do the following.

At the moment, I cannot use any router other than the one my ISP provides. This is fine, but the Wireless is diabolical on it.

I have a Cisco 857W sitting around, and I would like to use the Wireless on this device.

So

Internet ----> ISP Router ----> Cisco 857W ---> Wireless Access

Can this be done by simply creating a BVI for the wireless and switchports on the 857 thus bridging those parts? (i.e. I dont want to use the DSL port on the 857 at all, but simply bridge the FastEthernet and Dot11Radio)

Thanks!

David

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Comments

gojericho0

Yup, thats how I have mine setup. check out the config guide for commands

tech-airman

gorebrush wrote: »

Odd question, but I wonder if I could do the following.

At the moment, I cannot use any router other than the one my ISP provides. This is fine, but the Wireless is diabolical on it.

I have a Cisco 857W sitting around, and I would like to use the Wireless on this device.

So

Internet ----> ISP Router ----> Cisco 857W ---> Wireless Access

Can this be done by simply creating a BVI for the wireless and switchports on the 857 thus bridging those parts? (i.e. I dont want to use the DSL port on the 857 at all, but simply bridge the FastEthernet and Dot11Radio)

Thanks!

David

gorebush,

What wireless technology/technologies are used by your wireless hosts?

gorebrush

Well my wireless host... is my iPhone.

Oh, and my works laptop, but I rarely use that over wireless.

iPhone supports WEP, WPA1+2.

Not sure if I quite need to go as far as WPA2 considering it is a home network.

Though the thought of being able to leverage the 857 as a switch and wireless AP is quite saucy.

Thanks for your help guys.

gorebrush

Can anyone provide any hints on what I need to do for a configuration?

I guess I need to bridge VLAN1 and Dot11Radio0 together?

If someone could help it would be much appreciated, this is getting on my nerves now.

kryolla

if you just want all the interfaces and dot11 interface to be in same broadcast domain as your isp router then you can set up a simple transparent bridge

turn off ip routing and get rid of all ip addresses
global config mode bridge 1 protocol ieee
under each interface bridge-group 1

I have IRB set up for my 851W just like gojericho0 below but unless you are doing routing you don't need it. If you are just basically setting up a switch you can configure transparent bridging.

gojericho0

this is how i setup my interfaces

interface Dot11Radio0.1
description Wireless Office Network
encapsulation dot1Q 1 native
ip flow ingress
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 spanning-disabled
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
!
interface Vlan1
no ip address
ip virtual-reassembly
bridge-group 1
bridge-group 1 spanning-disabled
!
interface BVI1
ip address 192.168.1.1 255.255.255.0
ip access-group 100 in
no ip redirects
no ip unreachables
no ip proxy-arp
ip flow ingress
ip nat inside
ip virtual-reassembly
!

tech-airman

gorebrush wrote: »

Well my wireless host... is my iPhone.

Oh, and my works laptop, but I rarely use that over wireless.

iPhone supports WEP, WPA1+2.

Not sure if I quite need to go as far as WPA2 considering it is a home network.

Though the thought of being able to leverage the 857 as a switch and wireless AP is quite saucy.

Thanks for your help guys.

gorebush,

I was actually asking about which type of 802.11 it uses. Does it use:

802.11a
802.11b
802.11g
802.11n
Some of the above?
All of the above?
None of the above?
Other?

gorebrush

Thanks for your replies!

@ gojericho

That's what I had in my mind, but I kept getting in knots over it. That is superb.

@ tech-airman

Sorry, it is 802.11b/g I believe.

Thanks all!!

kryolla

do you know the difference between transparent bridging, CRB, and IRB. You are setting a BVI interface to represent you bridge ports sort of like an SVI represents your vlan ports and then the BVI does the routing. So for my setup I have my dot11 and fastethernet ports bridged and the BVI does the routing between my lan and my wan port which connects to my cable ISP.

(i.e. I dont want to use the DSL port on the 857 at all, but simply bridge the FastEthernet and Dot11Radio)

gorebrush

kryolla wrote: »

do you know the difference between transparent bridging, CRB, and IRB. You are setting a BVI interface to represent you bridge ports sort of like an SVI represents your vlan ports and then the BVI does the routing. So for my setup I have my dot11 and fastethernet ports bridged and the BVI does the routing between my lan and my wan port which connects to my cable ISP.

Haven't got as far as learning about CRB/IRB Transparent yet.

But thanks for tip.

gorebrush

For those who are interested: -

Building configuration...

Current configuration : 1634 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname 857WAP
!
boot-start-marker
boot-end-marker
!
enable secret ...
!
no aaa new-model
!
resource policy
!
!
!
ip cef
!
!
!
!
!
!
bridge irb
!
!
interface ATM0
no ip address
shutdown
no atm ilmi-keepalive
dsl operating-mode auto
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface Dot11Radio0
no ip address
!
broadcast-key change 60
!
!
encryption mode ciphers tkip
!
ssid CISCO
authentication open
authentication key-management wpa
guest-mode
wpa-psk ascii 0 <<removed>>
!
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
rts threshold 2312
power local cck 20
power local ofdm 17
beacon period 1000
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 spanning-disabled
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
!
interface Vlan1
no ip address
ip virtual-reassembly
bridge-group 1
bridge-group 1 spanning-disabled
!
interface BVI1
ip address 172.16.0.254 255.255.255.0
!
ip default-gateway 172.16.0.1
ip route 0.0.0.0 0.0.0.0 172.16.0.1
!
no ip http server
no ip http secure-server
!
!
control-plane
!
bridge 1 protocol ieee
bridge 1 route ip
!
line con 0
logging synchronous
no modem enable
line aux 0
line vty 0 4
exec-timeout 30 0
password .....
logging synchronous
login
!
scheduler max-task-time 5000
end

kryolla

looks good but a lot of un-needed config for your purpose. If you were using the DSL port then you have the right config.

gojericho0

good job

it took me a little to get the hang of the bvi interface since i never used it before

gorebrush

kryolla wrote: »

looks good but a lot of un-needed config for your purpose. If you were using the DSL port then you have the right config.

Can always use it as a backup