Technical Documentation

Example: Configuring MX Series Router ATM Ethernet Interworking

Consider the router topology shown in Figure 1. The MX Series router is configured as the Provider Edge 2 (PE2) router in the figure to support the ATM Ethernet IWF.

Figure 1: ATM Ethernet VLAN Interworking

Image g017428.gif

The relevant router interfaces are:

  • On CE1, the CE1–PE1 interface is at-2/0/0 with IP address 30.1.1.1/24

  • On PE1:

    • The PE1–CE1 interface is at-2/0/1 with no IP address required
    • The PE1–PE2 interface is ge-5/0/0 with IP address 20.1.1.1/24

  • On PE2:

    • The PE2–CE2 interface is ge-0/2/0 with no IP address required
    • The PE2–PE1 interface is ge-0/2/8 with IP address 20.1.1.10/24
  • CE2 interface is ge-0/0/0 with IP address 30.1.1.10/24

Note: These are not complete router configurations.

Configuring PE2 with a Layer 2 Circuit

CE1 Configuation

Configure Ethernet over ATM on the ATM interface

[edit]
interfaces {
at-2/0/0 {
encapsulation ethernet-over-atm;
atm-options {
vpi 100;
}
unit 0 {
vci 100.34;
family inet {
address 30.1.1.1/24;
}
}
}
}

PE1 Configuation

Configure the Layer 2 Circuit

[edit]
interfaces {
at-2/0/1 {
atm-options {
vpi 100;
}
unit 0 {
encapsulation vlan-vci-ccc;
vpi 100;
vci-range 32 63;
}
}
ge-5/0/0 {
unit 0 {
family inet {
address 20.1.1.1/24;
}
family mpls;
}
}
protocols {
mpls {
interface ge-5/0/0.0;
}
ospf {
area 0.0.0.0 {
interface ge-5/0/0.0;
interface lo0.0 {
passive;
}
}
}
ldp {
interface all;
}
l2circuit {
neighbor 10.255.171.14 {
interface at-2/0/1.0 {
virtual-circuit-id 100;
}
}
}
}

PE2 Configuation

Configure the Layer 2 Circuit on the MX Series Router

[edit]
interfaces {
ge-0/2/0 {
vlan-vci-tagging;
encapsulation vlan-vci-ccc;
unit 0 {
vlan-id 100;
inner-vlan-id-range start 32 end 63;
}
}
ge-0/2/8 {
unit 0 {
family inet {
address 20.1.1.10/24;
}
family mpls;
}
}
protocols {
mpls {
interface ge-0/2/8.0;
}
ospf {
area 0.0.0.0 {
interface ge-0/2/8.0;
interface lo0.0 {
passive;
}
}
}
ldp {
interface all;
}
l2circuit {
neighbor 10.255.171.45 {
interface ge-0/2/0.0 {
virtual-circuit-id 100;
}
}
}
}

CE2 Configuation

Configure Dual Tagged Ethernet Interface

[edit]
interfaces {
ge-0/0/0 {
flexible-vlan-tagging;
encapsulation flexible-ethernet-services;
unit 0 {
vlan-tags outer 100 inner 34;
family inet {
address
30.1.1.10/24;
}
}
}
}

You verify your configuration on the MX Series router with the show l2circuit connections command:


user@PE2>show l2circuit connections
Layer-2 Circuit Connections:
 
    Legend for connection status (St)
    EI -- encapsulation invalid      NP -- interface h/w not present
    MM -- mtu mismatch               Dn -- down
    EM -- encapsulation mismatch     VC-Dn -- Virtual circuit Down
    CM -- control-word mismatch      Up -- operational
    VM -- vlan id mismatch           CF -- Call admission control failure
    OL -- no outgoing label          IB -- TDM incompatible bitrate
    NC -- intf encaps not CCC/TCC    TM -- TDM misconfiguration
    BK -- Backup Connection          ST -- Standby Connection
    CB -- rcvd cell-bundle size bad  XX -- unknown
    SP -- Static Pseudowire
 
    Legend for interface status
    Up -- operational
    Dn -- down
    Neighbor: 10.255.171.45
        Interface                 Type  St     Time last up          # Up trans
        ge-0/2/0.0(vc 100)        rmt   Up     May 12 13:01:50 2009           1
          Remote PE: 10.255.171.45, Negotiated control-word: Yes (Null)
          Incoming label: 299824, Outgoing label: 299776
          Local interface: ge-0/2/0.0, Status: Up, Encapsulation: VLAN Q-in-Q and VCI Interworking

Configuring PE2 with a Layer 2 Circuit over Aggregated Ethernet

CE1 Configuation

Configure Ethernet over ATM on the ATM interface

[edit]
interfaces {
at-2/0/0 {
encapsulation ethernet-over-atm;
atm-options {
vpi 100;
}
unit 0 {
vci 100.34;
family inet {
address 30.1.1.1/24;
}
}
}
}

PE1 Configuation

Configure the Layer 2 Circuit

[edit]
interfaces {
at-2/0/1 {
atm-options {
vpi 100;
}
unit 0 {
encapsulation vlan-vci-ccc;
vpi 100;
vci-range 32 63;
}
}
ge-5/0/0 {
unit 0 {
family inet {
address 20.1.1.1/24;
}
family mpls;
}
}
protocols {
mpls {
interface ge-5/0/0.0;
}
ospf {
area 0.0.0.0 {
interface ge-5/0/0.0;
interface lo0.0 {
passive;
}
}
}
ldp {
interface all;
}
l2circuit {
neighbor 10.255.171.14 {
interface at-2/0/1.0 {
virtual-circuit-id 100;
}
}
}
}

PE2 Configuation

Configure the Layer 2 Circuit over Aggregated Ethernet on the MX Series Router

[edit]
chassis {
aggregated-devices {
ethernet {
device-count 1;
}
}
interfaces {
ge-0/2/0 {
gigether-options {
802.3ad ae0;
}
}
ge-0/2/8 {
unit 0 {
family inet {
address 20.1.1.10/24;
}
family mpls;
ae0 {
vlan-vci-tagging;
encapsulation vlan-vci-ccc;
unit 0 {
vlan-id 100;
inner-vlan-id-range start 32 end 63;
}
}
}
protocols {
mpls {
interface ge-0/2/8.0;
}
ospf {
area 0.0.0.0 {
interface ge-0/2/8.0;
interface lo0.0 {
passive;
}
}
}
ldp {
interface all;
}
l2circuit {
neighbor 10.255.171.45 {
interface ae0.0 {
virtual-circuit-id 100;
}
}
}
}

CE2 Configuation

Configure Dual Tagged Ethernet Interface

[edit]
interfaces {
ge-0/0/0 {
flexible-vlan-tagging;
encapsulation flexible-ethernet-services;
unit 0 {
vlan-tags outer 100 inner 34;
family inet {
address
30.1.1.10/24;
}
}
}
}

You verify your configuration on the MX Series router with the show l2circuit connections command:


user@PE2>show l2circuit connections
Layer-2 Circuit Connections:
 
    Legend for connection status (St)
    EI -- encapsulation invalid      NP -- interface h/w not present
    MM -- mtu mismatch               Dn -- down
    EM -- encapsulation mismatch     VC-Dn -- Virtual circuit Down
    CM -- control-word mismatch      Up -- operational
    VM -- vlan id mismatch           CF -- Call admission control failure
    OL -- no outgoing label          IB -- TDM incompatible bitrate
    NC -- intf encaps not CCC/TCC    TM -- TDM misconfiguration
    BK -- Backup Connection          ST -- Standby Connection
    CB -- rcvd cell-bundle size bad  XX -- unknown
    SP -- Static Pseudowire

    Legend for interface status
    Up -- operational
    Dn -- down
    Neighbor: 10.255.171.45
        Interface                 Type  St     Time last up          # Up trans
        ae0.0(vc 100)             rmt   Up     May 12 14:48:58 2009           2
          Remote PE: 10.255.171.45, Negotiated control-word: Yes (Null)
          Incoming label: 299872, Outgoing label: 299824
          Local interface: ae0.0, Status: Up, Encapsulation:VLAN Q-in-Q and VCI Interworking

Configuring PE2 with a Remote Interface Switch

CE1 Configuation

Configure Ethernet over ATM on the ATM interface

[edit]
interfaces {
at-2/0/0 {
encapsulation ethernet-over-atm;
atm-options {
vpi 100;
}
unit 0 {
vci 100.34;
family inet {
address 30.1.1.1/24;
}
}
}
}

PE1 Configuation

Configure the Remote Interface Switch

[edit]
interfaces {
at-2/0/1 {
atm-options {
vpi 100;
}
unit 0 {
encapsulation vlan-vci-ccc;
vpi 100;
vci-range start 32 end 63;
}
}
ge-5/0/0 {
unit 0 {
family inet {
address 20.1.1.1/24;
}
family iso;
family mpls;
}
}
protocols {
rsvp {
interface ge-5/0/0.0;
}
mpls {
label-switched-path lsp1-2 {
from 10.255.171.45;
to 10.255.171.14;
}
label-switched-path lsp2-1 {
from 10.255.171.14;
to 10.255.171.45;
}
interface ge-5/0/0.0;
}
isis {
interface ge-5/0/0.0;
}
connections {
remote-interface-switch rws1 {
interface at-2/0/1.0;
transmit-lsp lsp1-2;
receive-lsp lsp2-1;
}
}
}

PE2 Configuation

Configure the Remote Interface Switch on the MX Series Router

[edit]
interfaces {
ge-0/2/0 {
vlan-vci-tagging;
encapsulation vlan-vci-ccc;
unit 0 {
vlan-id 100;
inner-vlan-id-range start 32 end 63;
}
}
ge-0/2/8 {
unit 0 {
family inet {
address 20.1.1.10/24;
}
family iso;
family mpls;
}
}
protocols {
rsvp {
interface ge-0/2/8.0;
}
mpls {
label-switched-path lsp2-1 {
from 10.255.171.14;
to 10.255.171.45;
}
label-switched-path lsp1-2 {
from 10.255.171.45;
to 10.255.171.14;
}
interface ge-0/2/8.0;
}
isis {
interface ge-0/2/8.0;
}
connections {
remote-interface-switch rws1 {
interface ge-0/2/0.0;
transmit-lsp lsp2-1;
receive-lsp lsp1-2;
}
}
}

CE2 Configuation

Configure Dual Tagged Ethernet Interface

[edit]
interfaces {
ge-0/0/0 {
flexible-vlan-tagging;
encapsulation flexible-ethernet-services;
unit 0 {
vlan-tags outer 100 inner 34;
family inet {
address
30.1.1.10/24;
}
}
}
}

You verify your configuration on the MX Series router with the show connections command:


user@PE2>show connections
CCC and TCC connections [Link Monitoring On]
    Legend for status (St)              Legend for connection types
    UN -- uninitialized                 if-sw:  interface switching
    NP -- not present                   rmt-if: remote interface switching
    WE -- wrong encapsulation           lsp-sw: LSP switching
    DS -- disabled                      tx-p2mp-sw: transmit P2MP switching
    Dn -- down                          rx-p2mp-sw: receive P2MP switching
    -> -- only outbound conn is up
    <- -- only inbound  conn is up      Legend for circuit types
    Up -- operational                   intf -- interface
    RmtDn -- remote CCC down            tlsp -- transmit LSP
    Restart -- restarting               rlsp -- receive LSP
 
 
    Connection/Circuit                Type        St      Time last up     # Up trans
    rws1                              rmt-if      Up      May 13 11:25:40           1
      ge-0/2/0.0                        intf  Up
      lsp2-1                            tlsp  Up
      lsp1-2                            rlsp  Up

Configuring PE2 with a Remote Interface Switch over Aggregated Ethernet

CE1 Configuation

Configure Ethernet over ATM on the ATM interface

[edit]
interfaces {
at-2/0/0 {
encapsulation ethernet-over-atm;
atm-options {
vpi 100;
}
unit 0 {
vci 100.34;
family inet {
address 30.1.1.1/24;
}
}
}
}

PE1 Configuation

Configure the Remote Interface Switch

[edit]
interfaces {
at-2/0/1 {
atm-options {
vpi 100;
}
unit 0 {
encapsulation vlan-vci-ccc;
vpi 100;
vci-range start 32 end 63;
}
}
ge-5/0/0 {
unit 0 {
family inet {
address 20.1.1.1/24;
}
family iso;
family mpls;
}
}
protocols {
rsvp {
interface ge-5/0/0.0;
}
mpls {
label-switched-path lsp1-2 {
from 10.255.171.45;
to 10.255.171.14;
}
label-switched-path lsp2-1 {
from 10.255.171.14;
to 10.255.171.45;
}
interface ge-5/0/0.0;
}
isis {
interface ge-5/0/0.0;
}
connections {
remote-interface-switch rws1 {
interface at-2/0/1.0;
transmit-lsp lsp1-2;
receive-lsp lsp2-1;
}
}
}

PE2 Configuation

Configure the Remote Interface Switch over aggregated Ethernet on the MX Series Router

[edit]
chassis {
aggregated-devices {
ethernet {
device-count 1;
}
}
interfaces {
ge-0/2/0 {
gigether-options {
802.3ad ae0;
}
}
ge-0/2/8 {
unit 0 {
family inet {
address 20.1.1.10/24;
}
family iso;
family mpls;
}
}
ae0 {
vlan-vci-tagging;
encapsulation vlan-vci-ccc;
unit 0 {
vlan-id 100;
inner-vlan-id-range start 32 end 63;
}
}
}
protocols {
rsvp {
interface ge-0/2/8.0;
}
mpls {
label-switched-path lsp2-1 {
from 10.255.171.14;
to 10.255.171.45;
}
label-switched-path lsp1-2 {
from 10.255.171.45;
to 10.255.171.14;
}
interface ge-0/2/8.0;
}
isis {
interface ge-0/2/8.0;
}
connections {
remote-interface-switch rws1 {
interface ae0.0;
transmit-lsp lsp2-1;
receive-lsp lsp1-2;
}
}
}

CE2 Configuation

Configure Dual Tagged Ethernet Interface

[edit]
interfaces {
ge-0/0/0 {
flexible-vlan-tagging;
encapsulation flexible-ethernet-services;
unit 0 {
vlan-tags outer 100 inner 34;
family inet {
address
30.1.1.10/24;
}
}
}
}

You verify your configuration on the MX Series router with the show connections command:


user@PE2>show connections
CCC and TCC connections [Link Monitoring On]
    Legend for status (St)              Legend for connection types
    UN -- uninitialized                 if-sw:  interface switching
    NP -- not present                   rmt-if: remote interface switching
    WE -- wrong encapsulation           lsp-sw: LSP switching
    DS -- disabled                      tx-p2mp-sw: transmit P2MP switching
    Dn -- down                          rx-p2mp-sw: receive P2MP switching
    -> -- only outbound conn is up
    <- -- only inbound  conn is up      Legend for circuit types
    Up -- operational                   intf -- interface
    RmtDn -- remote CCC down            tlsp -- transmit LSP
    Restart -- restarting               rlsp -- receive LSP

    
    Connection/Circuit                Type        St      Time last up     # Up trans
    rws1                              rmt-if      RmtDn   May 12 15:34:46           1
      ae0.0                             intf  Up
      lsp2-1                            tlsp  Up
      lsp1-2                            rlsp  Up

Published: 2009-10-11