text: Welcome to Cisco Support Community. We would love to have your feedback.
  For an introduction to the new site, click here. And see here for current known issues.
  Hello everybody,
  I try to connect a 837 Router by an ADSL connection via a DSLAM to a 2610. (using PPPoA) On the network side I have a separate DNS running which can be reached from the 2610 (working as NAS) The ADSL connection seems to work properly. When I test the connection with the integrated tool in SDM I get the following error message:
  "No configured DNS server(s) are routable through the selected interface. "
  In details I can see that providing the IP from the NAS by IPCP seems to work. So it looks like a routing problem ?
  Here is the config of the 837:
  !
  version 12.3
  no service pad
  service timestamps debug datetime msec
  service timestamps log datetime msec
  no service password-encryption
  hostname ADSL-Router
  boot-start-marker
  boot-end-marker
  no logging buffered
  enable secret xxxxx
  enable password xxxxx
  no aaa new-model
  ip subnet-zero
  no ip routing
  ip dhcp excluded-address 10.10.10.1
  ip dhcp excluded-address 10.10.10.6 10.10.10.254
  ip dhcp pool Local
  import all
  network 10.10.10.0 255.255.255.0
  lease infinite
  ip domain lookup source-interface ATM0.2
  ip ips po max-events 100
  no ftp-server write-enable
  !
  no crypto isakmp ccm
  interface Ethernet0
  ip address 10.10.10.1 255.255.255.0
  no ip route-cache
  hold-queue 100 out
  interface ATM0
  no ip address
  no atm ilmi-keepalive
  dsl operating-mode auto
  interface ATM0.2 point-to-point
  pvc 1/32
  encapsulation aal5mux ppp dialer
  dialer pool-member 1
  interface FastEthernet1
  speed auto
  full-duplex
  interface FastEthernet2
  shutdown
  duplex auto
  interface FastEthernet3
  interface FastEthernet4
  interface Dialer0
  ip address negotiated
  ip nat inside
  ip virtual-reassembly
  encapsulation ppp
  dialer pool 1
  dialer-group 1
  ppp authentication chap callin
  ppp chap hostname xxxxxx
  ppp chap password 0 xxxxxx
  ppp ipcp dns request
  ip classless
  ip route 0.0.0.0 0.0.0.0 ATM0.2
  ip http server
  no ip http secure-server
  dialer-list 1 protocol ip permit
  control-plane
  line con 0
  no modem enable
  line aux 0
  line vty 0 4
  password xxxxx
  transport input telnet
  transport output telnet
  scheduler max-task-time 5000
  end
  Here is the config of the 2610:
  no service dhcp
  hostname NAS-Router
  enable secret 5 xxxxx
  ip cef
  ip domain lookup source-interface Ethernet0/0
  ip domain name mydomain.com
  ip name-server 192.168.14.2
  username xxxxx password 0 xxxxx
  controller E1 0/0
  mode atm
  interface Ethernet0/0
  ip address 192.168.14.1 255.255.255.0
  half-duplex
  no cdp enable
  interface ATM0/0
  pvc 8/35
  encapsulation aal5mux ppp Virtual-Template1
  !
  interface Virtual-Template1
  ip unnumbered Ethernet0/0
  peer default ip address pool kunden_isp1
  ppp authentication chap
  ppp ipcp dns 192.168.100.2
  ip local pool kunden_isp1 192.168.100.3 192.168.100.254
  ip route 192.168.100.0 255.255.255.0 ATM0/0
  exec-timeout 0 0
  I would really appreciate your help.
  Regards,
  Chris
  I believe that SDM is expecting a configured DNS server and perhaps a configured domain name on the remote router similar to what you have configured on the head end router.
  ip name-server 192.168.14.2
  HTH
  Rick
  Hi Rick,
  thanks for the answer.
  But I would like to simulate a client who is not provided with any DNS information at all by his ISP. So maybe it would make sense to use DHCP on the NAS rather than IPCP ?
  It seems to be a problem related to SDM, when I do everything straight in IOS it seems to work ... I get the propper IP address and DNS by IPCP ...
  Still I can not ping anything on the remote side in no direction. What do I miss in the above settings ? I can not get the thing done.
  I would highly appreciate your help.