Monday, March 14, 2016

Overlay VPN task #4. configuration optimization part 2

Topology:



Use configuration from L2VPN task #3 as initial configuration for this task.

Requirements: 

1. Reduce the number of LDP sessions in SP network to two (2). 
2. Further reduce the overhead for tunneled traffic to 8 byte only. 

Solution:

Highlight the text below to reveal the solution.

This task requires understanding for AToM Static Pseudowires
Using static pseudowires removes the need for targeted LDP session between the tunnel endpoints, and also allows to disable the control word, which is required for Ethernet traffic tunneling. 

Note that you need to configure the mpls label range for dynamic and static labels, before configuring the static pseudowires.

R1:


!
mpls label range 1000 100000 static 16 999
!
!
pseudowire-class ATOM_MAN
 encapsulation mpls
 protocol none
!
!
!
interface Ethernet1/0
 no ip address
 no cdp enable
 xconnect 18.0.3.3 46 encapsulation mpls manual pw-class ATOM_MAN
  mpls label 46 64
  no mpls control-word
!
interface Ethernet1/1
 no ip address
!
interface Ethernet1/1.57
 encapsulation dot1Q 57
 xconnect 18.0.3.3 57 encapsulation mpls manual pw-class ATOM_MAN
  mpls label 57 75
  no mpls control-word
!
interface Ethernet1/1.58
 encapsulation dot1Q 58
 xconnect 18.0.3.3 58 encapsulation mpls manual pw-class ATOM_MAN
  mpls label 58 85
  no mpls control-word
!

R3:

!
mpls label range 1000 100000 static 16 999
!
pseudowire-class ATOM_MAN
 encapsulation mpls
 protocol none
!
!
interface Ethernet1/0
 no ip address
 no cdp enable
 xconnect 18.0.1.1 46 encapsulation mpls manual pw-class ATOM_MAN
  mpls label 64 46
  no mpls control-word
!
interface Ethernet1/1
 no ip address
!
interface Ethernet1/1.75
 encapsulation dot1Q 75
 xconnect 18.0.1.1 57 encapsulation mpls manual pw-class ATOM_MAN
  mpls label 75 57
  no mpls control-word
!
interface Ethernet1/2
 no ip address
!
interface Ethernet1/2.85
 encapsulation dot1Q 85
 xconnect 18.0.1.1 58 encapsulation mpls manual pw-class ATOM_MAN
  mpls label 85 58
  no mpls control-word
!

Verification:


R1#show mpls ldp neighbor
    Peer LDP Ident: 18.0.2.2:0; Local LDP Ident 18.0.1.1:0
        TCP connection: 18.0.2.2.59677 - 18.0.1.1.646
        State: Oper; Msgs sent/rcvd: 50/51; Downstream
        Up time: 00:37:57
        LDP discovery sources:
          Ethernet0/0, Src IP addr: 18.0.12.2
        Addresses bound to peer LDP Ident:
          18.0.12.2       18.0.23.2       18.0.2.2


R1#show mpls l2transport vc detail
Local interface: Et1/0 up, line protocol up, Ethernet up
  Destination address: 18.0.3.3, VC ID: 46, VC status: up
    Output interface: Et0/0, imposed label stack {17 64}
    Preferred path: not configured
    Default path: active
    Next hop: 18.0.12.2
  Create time: 00:06:25, last status change time: 00:06:25
  Signaling protocol: Manual
    Status TLV support (local/remote)   : enabled/N/A
      Label/status state machine        : established, LruRru
      Last local dataplane   status rcvd: no fault
      Last local SSS circuit status rcvd: no fault
      Last local SSS circuit status sent: no fault
      Last local  LDP TLV    status sent: not sent
      Last remote LDP TLV    status rcvd: not sent
    MPLS VC labels: local 46, remote 64
    Group ID: local 0, remote 0
    MTU: local 1500, remote 1500
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 626, send 645
    byte totals:   receive 622601, send 638832
    packet drops:  receive 0, seq error 0, send 3

Local interface: Et1/1.57 up, line protocol up, Eth VLAN 57 up
  Destination address: 18.0.3.3, VC ID: 57, VC status: up
    Output interface: Et0/0, imposed label stack {17 75}
    Preferred path: not configured
    Default path: active
    Next hop: 18.0.12.2
  Create time: 00:05:53, last status change time: 00:05:53
  Signaling protocol: Manual
    Status TLV support (local/remote)   : enabled/N/A
      Label/status state machine        : established, LruRru
      Last local dataplane   status rcvd: no fault
      Last local SSS circuit status rcvd: no fault
      Last local SSS circuit status sent: no fault
      Last local  LDP TLV    status sent: not sent
      Last remote LDP TLV    status rcvd: not sent
    MPLS VC labels: local 57, remote 75
    Group ID: local 0, remote 0
    MTU: local 1500, remote 1500
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 0, send 0
    byte totals:   receive 0, send 0
    packet drops:  receive 0, seq error 0, send 0

Local interface: Et1/1.58 up, line protocol up, Eth VLAN 58 up
  Destination address: 18.0.3.3, VC ID: 58, VC status: up
    Output interface: Et0/0, imposed label stack {17 85}
    Preferred path: not configured
    Default path: active
    Next hop: 18.0.12.2
  Create time: 00:05:33, last status change time: 00:05:33
  Signaling protocol: Manual
    Status TLV support (local/remote)   : enabled/N/A
      Label/status state machine        : established, LruRru
      Last local dataplane   status rcvd: no fault
      Last local SSS circuit status rcvd: no fault
      Last local SSS circuit status sent: no fault
      Last local  LDP TLV    status sent: not sent
      Last remote LDP TLV    status rcvd: not sent
    MPLS VC labels: local 58, remote 85
    Group ID: local 0, remote 0
    MTU: local 1500, remote 1500
  Sequencing: receive disabled, send disabled
  VC statistics:
    packet totals: receive 0, send 0
    byte totals:   receive 0, send 0
    packet drops:  receive 0, seq error 0, send 0

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