09-03-2012 02:20 PM - edited 03-04-2019 05:27 PM
Hi,
Could anyone please help me configure my new CISCO 887VA ADSL router.
I cannot get the dialer to establish a connection.
I have an ADSL2 connection from ISP with an LLC encapsulation and pvc of 0/35, below is my router config.
Router#sh run
Building configuration...
Current configuration : 2068 bytes
!
! Last configuration change at 21:17:24 UTC Mon Sep 3 2012
! NVRAM config last updated at 21:17:25 UTC Mon Sep 3 2012
! NVRAM config last updated at 21:17:25 UTC Mon Sep 3 2012
version 15.1
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
shell processing full
!
no logging console
!
no aaa new-model
memory-size iomem 10
crypto pki token default removal timeout 0
!
!
ip source-route
!
!
!
!
ip dhcp pool LAB-Pool
import all
network 192.168.0.0 255.255.255.0
dns-server 202.62.124.238 202.62.120.4
default-router 192.168.0.1
!
!
ip cef
no ipv6 cef
!
!
license udi pid CISCO887VA-K9 sn FGL163224PV
!
!
!
!
!
!
controller VDSL 0
!
!
!
!
!
!
!
!
interface Ethernet0
no ip address
!
interface ATM0
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
ip flow ingress
no atm ilmi-keepalive
!
interface ATM0.1 point-to-point
pvc 0/35
encapsulation aal5snap
!
!
interface FastEthernet0
no ip address
!
interface FastEthernet1
no ip address
!
interface FastEthernet2
no ip address
!
interface FastEthernet3
no ip address
!
interface Vlan1
description Internal LAN
ip address 192.168.0.1 255.255.255.0
ip nat inside
ip virtual-reassembly in
!
interface Dialer0
ip address negotiated
no ip redirects
no ip unreachables
no ip proxy-arp
ip mtu 1492
ip nbar protocol-discovery
ip flow ingress
ip nat outside
ip virtual-reassembly in
encapsulation ppp
ip tcp adjust-mss 1452
dialer pool 1
dialer-group 1
ppp authentication chap pap callin
ppp chap hostname xxxxxxxxxxx
ppp chap password 0 xxxxxxxxxxxx
ppp pap sent-username xxxxxxxxxx password 0 xxxxxxxxxx
ppp ipcp address accept
no cdp enable
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
ip dns server
ip nat inside source list 101 interface Dialer0 overload
ip route 0.0.0.0 0.0.0.0 Dialer0
!
access-list 101 permit ip 192.168.0.0 0.0.255.255 any
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
login
transport input all
!
end
Router#
09-03-2012 11:09 PM
Start checking "show controller vdsl 0".
Then if it is RFC bridged connction, as opposed to PPPoE, your configuration is completely wrong. Otherwise is only partially wrong. Confirm with ISP, if you are not assigned username/password, it's bridged RFC.
09-04-2012 01:38 PM
I managed to fix the issue with help from ISP engineer, thanks Masi.
Changed the configs on the ATM0.1
interface ATM0.1 point-to-point
pvc 0/35
pppoe-client dial-pool-number 1
Dialer could establish a connection to ISP after this.
09-04-2012 11:27 PM
Note that you need
ip tcp adjust-mss 1452
on VLAN interface, not Dialer.
09-04-2012 11:33 PM
Hi Paolo,
I have actually tested this - and it turned out that the ip tcp adjust-mss applies to both ingress and egress traffic and can be safely placed on Dialer interface as well. That makes it actually even more simple to deploy if there are several internal interfaces, as placing this command on the Dialer interface will make it apply to all traffic exiting the router towards the DSL.
Best regards,
Peter
09-04-2012 11:45 PM
That makes sense. Good advice Peter.
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