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A9K - L2TPv3 Tunnel

Hello All,

I'm trying to configure a L2TP tunnel between two ASR9Ks. The configuration is pretty straightforward and the tunnel came up tidy. However I’m unable to pass traffic throught the tunnel. All the traffic if dropped in the inbound interface.

Configuration


interface GigabitEthernet0/0/0/5.100 l2transport

encapsulation dot1q 100

!

l2vpn

pw-class L2TP-CLASS

encapsulation l2tpv3

   protocol l2tpv3 class L2TP-CLASS

   ipv4 source 172.25.200.10

   transport-mode vlan

!

xconnect group L2TP

p2p L2TP

   interface GigabitEthernet0/0/0/5.100

   neighbor 172.25.200.11 pw-id 654

   pw-class L2TP-CLASS

Outputs


RP/0/RSP0/CPU0:A9K-LAB03#sh l2vpn xconnect group L2TP detail

Tue Mar 4 11:27:33.571 WET

Group L2TP, XC L2TP, state is up; Interworking none

AC: GigabitEthernet0/0/0/5.100, state is up

   Type VLAN; Num Ranges: 1

   VLAN ranges: [100, 100]

   MTU 9182; XC ID 0x840006; interworking none

   Statistics:

     packets: received 0, sent 0

     bytes: received 0, sent 0

     drops: MTU exceeded 0, other 0

PW: neighbor 172.25.200.11, PW ID 654, state is up ( established )

   PW class L2TP-CLASS, XC ID 0x840006

   Encapsulation L2TPv3, protocol L2TPv3

   PW type Ethernet VLAN, control word disabled, interworking none

   PW backup disable delay 0 sec

   Sequencing not set

   L2TP class L2TP-CLASS, IPv4 source address 172.25.200.10

   TOS 0 (reflect disabled), TTL 255, DF bit not set

   Path MTU: disabled

   Tunnel state connected, remote circuit status up

     L2TPv3       Local                         Remote                      

     ------------ ------------------------------ -----------------------------

     Session     792824663                     3260689897                  

     Cookie size 0 bytes                       0 bytes                    

     Cookie       unassigned                     unassigned                  

      MTU         9182                           9182                        

     Control word disabled                       disabled                    

     PW type     Ethernet VLAN                 Ethernet VLAN                

     ------------ ------------------------------ -----------------------------

   Create time: 04/03/2014 11:23:44 (00:03:43 ago)

   Last time status changed: 04/03/2014 11:24:14 (00:03:13 ago)

   Statistics:

     packets: received 0, sent 0

     bytes: received 0, sent 0

     drops: out of sequence 0, other 0

RP/0/RSP0/CPU0:A9K-LAB03#sh l2tp tunnel detail

Tue Mar  4 11:53:33.658 WET

Tunnel id 715704093 is up, remote id is 3012491936, 1 active sessions

  Locally initiated tunnel

  Tunnel state is established, time since change 00:13:37

  Tunnel transport is IP  (115)

  Remote tunnel name is A9K-LAB04

    Internet Address 172.25.200.11, port 0

  Local tunnel name is A9K-LAB03

    Internet Address 172.25.200.10, port 0

  VRF table id is 0xe0000000

  Tunnel group id

  L2TP class for tunnel is L2TP-CLASS

  Control Ns 18, Nr 18

  Local RWS 512 (default), Remote RWS 512

  Control channel Congestion Control is disabled

  Tunnel PMTU checking disabled

  Retransmission time 1, max 1 seconds

  Unsent queuesize 0, max 0

  Resend queuesize 0, max 2

  Total resends 0, ZLB ACKs sent 16

  Total out-of-order dropped pkts 0

  Total out-of-order reorder pkts 0

  Total peer authentication failures 0

  Current no session pak queue check 0 of 5

  Retransmit time distribution: 0 0 0 0 0 0 0 0 0

  Control message authentication is disabled

RP/0/RSP0/CPU0:A9K-LAB03#sh l2tp counters forwarding session

Tue Mar  4 11:55:50.613 WET

LocID      RemID      TunID      Pkts-In              Pkts-Out

                                 Bytes-In             Bytes-Out

123327359  1688338792 715704093  0                    0                  

                                 0                    0                  

Any idea of what might be wrong?

Cheers,

PM

Everyone's tags (5)
2 ACCEPTED SOLUTIONS

Accepted Solutions
Cisco Employee

Re: A9K - L2TPv3 Tunnel

l2tpv3 for ipv4 is not supported on ASR9k ,though l2tpv3ov6 is supported 4.3.1 onwards !!

Cisco Employee

Re: A9K - L2TPv3 Tunnel

5 REPLIES
Cisco Employee

Re: A9K - L2TPv3 Tunnel

l2tpv3 for ipv4 is not supported on ASR9k ,though l2tpv3ov6 is supported 4.3.1 onwards !!

Cisco Employee

Re: A9K - L2TPv3 Tunnel

Is L2VPN over GRE an option for you? You can look at that.

Eddie.

Sent from Cisco Technical Support iPhone App

New Member

Re: A9K - L2TPv3 Tunnel

Hi Saurabh, Eddie,

Thanks for your reply.

Could you please confirm if L2TPv3 for IPv4 is supported on CRS? In what version?

Thanks.

Regards,

PM

Cisco Employee

Re: A9K - L2TPv3 Tunnel

New Member

Re: A9K - L2TPv3 Tunnel

Thx Saurabh!

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