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887VA in bridging mode for VDSL

Unanswered Question

Hi all, thanks for taking the time to read my post.

I’m looking for a bit of advice on how to configure the router. I’ve found plenty of posts relating to bridging mode for ADSL but none for VDSL service.


BT infinity service using home hub 5 (which cannot be placed in modem mode), connected to 887VA. I want to use the router in bridging so I can place a ASA5505 between the router and the LAN (ASA to have PPoE configured).

This is all sandbox at home and not a production environment. I know its overkill to use this as a bridge but I dont intend to use it forever like this and my only alternative is to purchase a vdsl modem (more expense!)

Any help to get this to work would be greatly appreciated.

Current 887VA config as below before I start mucking around.



hostname Router






no aaa new-model

memory-size iomem 10

crypto pki token default removal timeout 0



ip source-route



ip cef

no ipv6 cef



license udi pid CISCO887VA-K9 sn xxxxxxxxxx



username admin privilege 15 secret 4




controller VDSL 0



interface Ethernet0

no ip address

no fair-queue


interface Ethernet0.101

encapsulation dot1Q 101

pppoe-client dial-pool-number 1


interface ATM0

no ip address


no atm ilmi-keepalive


interface FastEthernet0

no ip address


interface FastEthernet1

no ip address


interface FastEthernet2

no ip address


interface FastEthernet3

no ip address


interface Vlan1

description LAN

ip address 10.x.x.x

ip nat inside

ip virtual-reassembly in


interface Dialer1

description INFINITY

ip address negotiated

no ip unreachables

ip mtu 1492

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 [email protected]

ppp chap password 0 x

no cdp enable


ip forward-protocol nd

ip http server

ip http authentication local

no ip http secure-server

ip http timeout-policy idle 60 life 86400 requests 10000


ip nat inside source list NAT interface Dialer1 overload

ip route Dialer1


ip access-list extended NAT

permit ip 10.x.x.0 any




line con 0

line aux 0

line vty 0 4

privilege level 15

login local

transport input telnet ssh

transport output telnet ssh




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Alexandre Hautequest Sat, 01/25/2014 - 20:12
User Badges:

887VA(config)#controller VDSL 0

887VA(config-controller)#operating mode ?

  adsl1   ITU G.992.1

  adsl2   ITU G.992.3

  adsl2+  ITU G.992.5

  ansi    ANSI T1.413

  auto    auto detect mode

  vdsl2   ITU G.993.2

The VDSL controller on the 887VA is smart enough to detect if the line is an ADSL or VDSL. If that's an assured config for ADSL bridge, it will then work on VDSL as well. I happen to have a couple 887VA but never made them as a bridge, so I can't comment on the above config.


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