Cisco BT VDSL Configuration


There are many variations of the Cisco configuration for VDSL (FTTC) on the internet, but the following configuration is quite detailed and provides a very stable connection in my experience. 

Please feel free to tweak accordingly. 

Configuration Example: 

service internal
ethernet cfm ieee
ethernet cfm global
ethernet cfm traceroute cache
ethernet cfm domain FTTx_MD_Openreach_1 level 1
mep archive-hold-time 5
sender-id chassis
service VLAN101-Service vlan 101 direction down
  continuity-check interval 1m
  sender-id chassis
ethernet cfm logging
controller VDSL 0 or 0/0/0 <- These numbers will change depending on the hardware platform that you are running this from. 

firmware filename flash:VA_A_39m_B_38h3_24h.bin <- If you are using custom firmware, this is what it would look like. 
operating mode auto
modem customUKAnnexM
modem ukfeature
modem disableV43
modem disableGinpDsSupport
no shutdown
interface Ethernet0
description ** Pseudo VDSL Interface ** 
no ip address
load-interval 30
ethernet cfm mep domain FTTx_MD_Openreach_1 mpid 101 vlan 101
  alarm notification all
ethernet oam mode passive
ethernet oam remote-loopback supported
ethernet oam
no cdp enable
no shut
interface Ethernet0.101
description ** Tagging for BT Network **
encapsulation dot1Q 101
pppoe enable group global
pppoe-client dial-pool-number 1
no cdp enable
no shut
interface ATM 0 or 0/0/0 <- This will depend on the hardware appliance that you are using as mentioned above.
description ** ADSL Interface **
no ip address
no atm ilmi-keepalive
interface Dialer0
description ** PPP Connection **
mtu 1492
ip tcp adjust-mss 1452
ip address negotiated
no ip redirects
no ip unreachables
no ip proxy-arp
encapsulation ppp
dialer pool 1
dialer idle-timeout 0
dialer persistent
dialer-group 1
ppp chap hostname <ISP USERNAME>
ppp chap password 0 <ISP PASSWORD>
ppp ipcp address accept
ppp ipcp dns request
ppp ipcp route default
no cdp enable
ip route dialer0

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