AToM Static Pseudowire Provisioning

The AToM Static Pseudowire Provisioning feature allows you to configure static pseudowires in cases where you cannot use directed control protocols. .In most cases, pseudowires are dynamically provisioned using LDP or another directed control protocol, such as Resource Reservation Protocol over traffic-engineered tunnels (RSVP-TE), to exchange the various parameters required for these connections.

The AToM Static Pseudowire Provisioning feature is platform-independent, but has been tested on only the Cisco 7600 series routers.

This feature allows provisioning an AToM label switching static pseudowire without the use of a directed control connection. This feature also includes static provisioning of the tunnel label and the pseudowire label.

1.    enable

2.    configure terminal

3.    interface ethernet-type interface-number

4.    xconnect peer-ip-address vcid encapsulation mpls manual pw-class class-name

5.    mpls label local-pseudowire-label remote-pseudowire-label

6.    [no] mpls control-word

7.    exit

1.    show mpls l2transport vc detail

2.    ping mpls pseudowire ipv4-address vc-id vc-id

Router# show mpls l2transport vc detail
Local interface: Et1/0 up, line protocol up, Ethernet up
  Destination address: 10.0.1.1, VC ID: 200, VC status: up
    Output interface: Et3/0, imposed label stack {17}
    Preferred path: not configured  
    Default path:
    Next hop: 10.0.0.2
  Create time: 00:27:27, last status change time: 00:27:24
  Signaling protocol: Manual
    MPLS VC labels: local 17, remote 17 
    Group ID: local 0, remote 0
    MTU: local 1500, remote 1500
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 193, send 193
    byte totals:   receive 19728, send 23554
    packet drops:  receive 0, send 0

Router# ping mpls pseudowire 10.7.1.2 vc-id 1001
Sending 5, 100-byte MPLS Echos to 10.7.1.2,
      timeout is 2 seconds, send interval is 0 msec:
Codes: '!' - success, 'Q' - request not sent, '.' - timeout,
   'L' - labeled output interface, 'B' - unlabeled output interface,
   'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch,
   'M' - malformed request, 'm' - unsupported tlvs, 'N' - no label entry,
   'P' - no rx intf label prot, 'p' - premature termination of LSP,
   'R' - transit router, 'I' - unknown upstream index,
   'X' - unknown return code, 'x' - return code 0
Type escape sequence to abort.
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

The following examples show the configuration commands for an AToM static pseudowire connection between two PEs, PE1 and PE2.

The mpls label range static command must be used to configure the static label range prior to provisioning the AToM static pseudowire.

Router# configure terminal
Router(config)# mpls label range 200 16000 static 16 199
% Label range changes will take effect at the next reload.

The mpls ip command must also be configured on the core-facing interface of both PE1 and PE2 (which is also done for directed control protocol signaled pseudowires). Following is a configuration example:

Router(config)# interface Ethernet 0/0
Router(config-if)# description Backbone interface
Router(config-if)# ip address 10.0.0.1 255.255.255.0
Router(config-if)# mpls ip
Router(config-if)# exit

Following is an example AToM static pseudowire configuration for PE1:

Router(config)# interface Ethernet 1/0
Router(config-if)# no ip address
Router(config-if)# xconnect 10.131.191.251 100 encapsulation mpls manual pw-class mpls
Router(config-if-xconn)# mpls label 100 150
Router(config-if-xconn)# exit

Following is an example AToM static pseudowire configuration for PE2:

Router(config)# interface Ethernet 1/0
Router(config-if)# no ip address
Router(config-if)# xconnect 10.132.192.252 100 encapsulation mpls manual pw-class mpls
Router(config-if-xconn)# mpls label 150 100
Router(config-if-xconn)# exit

This feature also allows tunnel labels to be statically configured using the mpls static binding ipv4 vrf command. See the MPLS Static Labels feature module and the Cisco IOS Multiprotocol Label Switching Command Reference for information about static labels and the mpls static binding ipv4 vrfcommand.