02-19-2009 08:07 PM - edited 03-04-2019 03:39 AM
I am trying to setup a 871W router to work as a wireless LAN in our lab. I would like to connect it to a shared internet port on our server for internet access (WAN port). I can ping router from the system thats connected to the router LAN (FE0) and I can also ping to the gateway (shared port) too. But I was not able to ping anything else outside that. No internet connectivity either.. This is the first time I am configuring a cisco router, it would be great if you can guide me in right direction.
thanks
02-19-2009 11:52 PM
Hello Pavan,
the following link can help
http://www.cisco.com/en/US/docs/routers/access/800/850/software/configuration/guide/wireless.html
what you need:
a default static route on the 871W pointing to the gateway port.
the internet gateway needs a route to the subnet that the 871W uses for the wireless lan
then because we use private ip addresses inside all networks someone has to do NAT:
or the internet gateway is configured for NAT of the wireless lan subnet or:
the 871W has to NAT the wireless lan ip subnet using its ip address on the wired link.
for NAT commands on the 871W look the following
you need
ip nat inside on the correct layer 3 radio interface
bvi 1 associated to vlan 1 = dot1q 1
int bvi1
ip nat inside
ip nat outside on ethernet towards gateway
access-list 10 permit 10.10.10.10 0.0.0.255
ip nat inside source list 10 inter fas0/0 overload
the gateway has to then NAT to be able to access the internet
Hope to help
Giuseppe
02-24-2009 11:59 AM
02-25-2009 11:06 AM
Hello Pavan,
you should check the state of interface vlan1 and bv1
if you feel confident with telnet access
do
sh ip int brief
check if they are up/up
you may need to enable them with
conf t
int vlan 1
no shut
int bv1
no shut
2) does the PC connected to lan interface fas0 receive an ip address from the pool
you can check it from the shell
with ipconfig /all
on the router you can verify if NAT is working with
sh ip nat translations
3) to be noted I think you should a radio11 subinterface as in the example I linked from config guide
Hope to help
Giuseppe
04-15-2009 09:25 AM
Sorry I didn't reply for a long time. I was able to get it running by using a excel worksheet provided on TechRepublic, with minor additions to make it work for mine.
thanks for your help.
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