We are a small ISP that provides dsl service. The phone company is changing the data delivery to our router from ATM to Ethernet and I’m having trouble configuring a 7200 vxr to work with static IP’s on the end users.
ip dhcp excluded-address 10.10.10.230 10.10.10.254
!
ip dhcp pool test
network 10.10.10.0 255.255.255.0
default-router 10.10.10.1
dns-server 209.211.0.3
!
interface Loopback1
ip address 10.10.10.1 255.255.255.0
!
interface FastEthernet0/0.88
encapsulation dot1Q 3999 second-dot1q 88
ip unnumbered Loopback1
ip flow ingress
no snmp trap link-status
no cdp enable
We configure the dsl modem for bridge mode and configure the customer’s equipment. We are unable to statically assign IP's to our customers. If the customer's equipment is configured for a dynamic IP, this config works just fine. If the customer's equipment is configured for a static IP-either out of the excluded-address range or the dhcp pool- it doesn't work.
The following config will work but it requires a separate subnet for each subinterface.
Remove the loopback1 interface:
!
interface FastEthernet0/0.88
encapsulation dot1Q 3999 second-dot1q 88
ip address 10.10.10.1 255.255.255.0
ip flow ingress
no snmp trap link-status
no cdp enable
and configure the customer equipment with a static ip/netmask/gateway (10.10.10.2/255.255.255.0/10.10.10.1)
the only difference in this config is an ip address on the subinterface instead of using ip unnumbered Loopback1
Any suggestions would be appreciated.
