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EHWIC-VA-DSL-B VDSL2 general question

Hi,

I have to set up a VDSL2 connection (G.993.2) using an EHWIC-VA-DSL-B adapter on a 2911 ISR G2 router.

Could someone please explain why this is beeing configured using the Ethernet - Interface (in my case ethernet0/0/0) instead
of the ATM interface (beeing used in "old school" ADSL installations)?

Is there really Ethernet running between the Controller and the DSLAM? If so, why do we need a specific Controller for it?

I did not find a document which explains this in more detail.


Example:

interface Ethernet0/0/0

no ip address

no ip redirects

no ip unreachables

no ip proxy-arp

ip pim sparse-dense-mode

ip flow ingress

no ip route-cache

load-interval 30

!

interface Ethernet0/0/0.7

description VDSL2 Internet Connection German Telekom - VLAN 7 tagged

encapsulation dot1Q 7

no ip route-cache

pppoe enable group global

pppoe-client dial-pool-number 1

!

!

interface Dialer0

description Internet

ip address negotiated

ip mtu 1492

ip nat outside

ip virtual-reassembly in

encapsulation ppp

ip tcp adjust-mss 1412

dialer pool 1

dialer-group 1

ppp authentication pap chap callin

ppp chap hostname ***removed***

ppp chap password ***removed***

ppp pap sent-username ***removed***

ppp ipcp dns request

no cdp enable

Thanks

Heinz

1 Accepted Solution

Accepted Solutions

Ethernet can work on many different medias.

In this case layer 2 is Ethernet, layer 1 is VDSL2.

View solution in original post

6 Replies 6

paolo bevilacqua
Hall of Fame
Hall of Fame

Correct, VDSL2 is Ethernet First Mile technology, and there is no more ATM.

Note your adjust-mss value is wrong, should be 1452. Also, ppoe enable and dialer-group are not needed, and virtual reassembly should be disabled.

But isn´t the maximum cable length for Ethernet over copper just 100 meters?

Ethernet can work on many different medias.

In this case layer 2 is Ethernet, layer 1 is VDSL2.

Ok, understood.

Thank you!

Heinz

Hi Paolo,

Note your adjust-mss value is wrong, should be 1452. Also, ppoe enable and dialer-group are not needed, and virtual reassembly should be disabled.

why should virtual reassembly be disabled?

Thanks

Heinz

Because is deleterious.

Thank you for the nice rating and good luck!