RE: Dot1q trunking over L2TPv3 not working - urgent help needed

For you pseudowire-class you have "protocol l2tpv3 qassim" try without
specifying this. You didn't post l2tp-class qassim below. You should be
running in port mode. Another issue is you have PMTUD working for the l2tpv3
tunnel, you need to carry 1518 Bytes of data for a 1500 Byte user frame. Is
the MTU on the ingress interface enough, is the WAN Interface MTU enough to
carry this as well. With PMTUD enabled on the tunnel you won't fragment, you
truly don't want to fragment because reassembly is painful. But L2 has no
knowledge of fragmentation and path mtu discovery.

David

--
http://dcp.dcptech.com
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Tom Kacprzynski
> Sent: Thursday, August 25, 2011 10:33 AM
> To: Irfan Sid
> Cc: Cisco certification; Cisco certification
> Subject: Re: Dot1q trunking over L2TPv3 not working - urgent help
> needed
> 
> Irfan,
> Check out both of these links, they give you a really good examples (i
> think
> they are using switches):
> 
> 
> http://www.ccie18473.net/dynamips/dynamips.htm#atom-eompls-ss-port-qinq
> 
> http://www.ccie18473.net/dynamips/dynamips.htm#l2tpv3-eol2tpv3-ss-port-
> qinq
> 
> http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/l2tpv30s.html#w
> p1039477
> 
> 
> Your configuration has couple of issues. For one if you are trying to
> have a
> trunk, your interface on the router with pseudowires is not setup to be
> 802.1q tagged, you would need to create a subinterface and set the
> encapsulation on it. I think this should give you enough info to find
> out
> the rest.
> 
> Tom
> 
> 
> 
> On Tue, Aug 23, 2011 at 10:37 AM, Irfan Sid <lifeoverip_at_gmail.com>
> wrote:
> 
> > I want to do dot1q trunking over LTPTv3 however Its not working and I
> under
> > pressure to get this working for the customre by tomorrow, so urgent
> advise
> > will be appreciated.
> >
> >
> > my topology is below with the L2TPv3 tunnel endpoint facing the
> switch on
> > both ends.
> >
> >
> > switch --------------------ISR2921----------------------------L2TP
> >
> > TUNNEL------------------------------------ISR2921--------------------
> -------SWITCH
> >
> >
> >
> > The L2TPv3 tunnel is up on the ISR2921, but the trunking is not
> working
> > from
> > switch to switch. I can only ping via vlan1 from one switch to the
> other,
> > which is the native vlan. However if i try to ping from a tagged
> dot1q vlan
> > from a pc connected to the switch on both ends in the same vlan, it
> doesnt
> > ping . Please can someone advise my config is below. Is there
> anything else
> > i need to do to allow Dot1q over L2TPv3 tunnel?
> >
> >
> > ISR2921 Router CONFIG (mirror config on other end)
> >
> >
> > pseudowire-class qassim
> >
> > encapsulation l2tpv3
> >
> > protocol l2tpv3 qassim
> >
> > ip local interface Loopback0
> >
> > ip pmtu
> >
> > ip tos reflect
> >
> > ip tos value 184
> >
> > !
> >
> > !
> >
> > !
> >
> > !
> >
> > !
> >
> > interface Loopback0
> >
> > ip address 2.2.2.2 255.255.255.255
> >
> > !
> >
> > interface GigabitEthernet0/0
> >
> > description L3 WAN LINK
> >
> > bandwidth 10000
> >
> > ip address 192.168.1.1 255.255.255.252
> >
> > load-interval 30
> >
> > duplex auto
> >
> > speed 10
> >
> > service-policy output queue-on-out
> >
> > !
> >
> > !
> >
> > !
> >
> > interface GigabitEthernet0/0/0
> >
> > description INTERFACE TO SWITCH - L2TPv3 endpoint
> >
> > no ip address
> >
> > negotiation auto
> >
> > no keepalive
> >
> > xconnect 1.1.1.1 1 pw-class qassim
> >
> >
> > !
> >
> > !
> >
> >
> > SWITCH CONFIG (mirror config on other end)
> >
> >
> > vlan 100
> >
> >
> > interface GigabitEthernet0/0
> >
> > description INTERFACE TO ISR2921
> >
> > switchport trunk
> >
> >
> > interface GigabitEthernet 0/1
> >
> > description INTERFACE TO LAPTOP (PC)
> >
> > switchport access vlan 100
> >
> >
> > interface vlan 1
> > ip address 10.1.1.1 255.255.255.0
> >
> >
> >
> > Thanks in Adance
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> >
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