Cisco router configuration for a Tele2 VDSL connection

I got myself a Cisco 887V-W to replace the Comtrend modem that Tele2 ships with their 50 Mbit VDSL connection, once called Fiber Speed. Thanks goes out to Glazenbakje for a basic VDSL config that I could tweak to get it to work with Tele2.

I’d advise to upgrade to IOS 15.1T as it holds a newer ADSL firmware that does a better job calculating the attainable rate. If you connect your router and execute the sh controllers vdsl 0 command you’ll see something like this that indicates you have a VDSL carrier signal:

Modem Status: TC Sync (Showtime!)
DSL Config Mode: AUTO
Trained Mode: G.993.2 (VDSL2) Profile 17a
TC Mode: PTM
Selftest Result: 0x00
DELT configuration: disabled
DELT state: not running
Trellis: ON  ON
Line Attenuation:  0.0 dB  0.0 dB
Signal Attenuation:  0.0 dB  0.0 dB
Noise Margin:  6.2 dB  5.8 dB
Attainable Rate: 44884 kbits/s 5535 kbits/s
Actual Power: 14.2 dBm  1.4 dBm

And now for the basic config lines to get this going:

interface Ethernet0
no ip address
interface Ethernet0.32
encapsulation dot1Q 32
pppoe-client dial-pool-number 10
interface Vlan1
ip address
ip nat inside
ip virtual-reassembly in
ip tcp adjust-mss 1452

interface Dialer 10
mtu 1492
ip address negotiated
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat outside
no ip virtual-reassembly in
encapsulation ppp
ip route-cache policy
dialer pool 10
dialer string 555
dialer-group 10
ppp authentication chap callin
ppp chap hostname <username>
ppp chap password 0 <your decoded password>
no cdp enable
ip nat inside source list 101 interface Dialer10 overload
ip route Dialer10
access-list 101 permit ip any
dialer-list 10 protocol ip permit

Notes of interest: The VLAN ID that Tele2 uses for their internet connection is 32. They have different ID’s for i.e. the management connection to the modem but you don’t need those. They use CHAP for their PPPoE identification and I needed to use a dialer string with a random number to trigger the dial out.

In case you have any questions feel free to leave a comment and I’ll try to answer to the best of my ability.


Tele2 Fiberspeed VDSL with a Cisco modem

I have ordered Fiberspeed from Tele2, an affordable 50/5 VDSL connection. The modem is in but I’d like to hook it up to a Cisco router. I’ve ordered a 887VW that should do the job and used this hint to gain access to the setup of the Comtrend modem that Tele2 ships. The setup backup file reveals your PPPoE username and password although I suspect that they’re the same for everyone (username Comtrend, password Q29xxxxxxxxx). If this is indeed the case I’ll post them here later.

Update: Those settings indeed apply to every new modem shipped to a customer. However once connected it will download a new connection profile with your own PPPoE username and password in it which you’ll need to setup your Cisco router (or any other router for that matter). As of today the Tele2 Comtrend modem is still vulnerable to the hack listed in the link above so you should have no problem extracting the username and password. The username ends in and the password is encoded with base64 that you can safely decode here. Once you have this information it’s time to setup your Cisco router, I posted the required config lines here.