[ Contents] [ Prev] [ Next] [ Index] [ Report an Error]

Configuring and Verifying Unidirectional Links

This section contains two examples and commands that you can use to configure and verify unidirectional links:

Configuring and Verifying a Simple Example

To configure unidirectional link mode using default settings on 10-Gigabit Ethernet interface xe-5/1/0 and confirm the configuration:

[edit]
interfaces xe-5/1/0 {
unidirectional;
}
[edit]
user@host show interfaces
xe-5/1/0 {
unidirectional;
}

The transmit-only and receive-only interfaces are created as soon as you commit the configuration. The following show command is one way to verify creation of these new interfaces:


user@host run show interfaces xe-5/1/0* terse
Interface               Admin Link Proto    Local                 Remote
xe-5/1/0                up    down
xe-5/1/0-rx             up    down
xe-5/1/0-tx             up    up

The two unidirectional physical interfaces, xe-5/1/0-rx and xe-5/1/0-tx, are now present. In this example, no fiber-optic cables are connected to the port; consequently the xe-5/1/0 and xe-5/1/0-rx link states are down. In contrast, xe-5/1/0 is in the up state, because the transmit-only link is always up.

The following sample output provides more information about each of the interfaces. Unidirectional link mode has been enabled on xe-5/1/0, the transmit-only and receive-only interfaces are present, and the link state matches expectations for no fiber-optic cables connected to the physical port.


user@host run show interfaces xe-5/1/0*
Physical interface: xe-5/1/0, Enabled, Physical link is Down
  Interface index: 318, SNMP ifIndex: 118
  Link-level type: Ethernet, MTU: 1514, LAN-PHY mode, Speed: 10Gbps,
  Unidirectional: Enabled, Loopback: None, Source filtering: Disabled,
  Flow control: Enabled
  Device flags   : Present Running Down
  Interface flags: Hardware-Down SNMP-Traps Internal: 0x4000
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Current address: 00:05:85:75:8b:62, Hardware address: 00:05:85:75:8b:62
  Last flapped   : 2007-08-10 11:45:29 PDT (01:39:47 ago)
  Active alarms  : LINK
  Active defects : LINK
  PCS statistics                      Seconds
    Bit errors                             0
    Errored blocks                         0

Physical interface: xe-5/1/0-rx, Enabled, Physical link is Down
  Interface index: 153, SNMP ifIndex: 129
  Link-level type: Ethernet, MTU: 1514, LAN-PHY mode, Speed: 10Gbps,
  Unidirectional: Rx-Only
  Device flags   : Present Running Down
  Interface flags: Hardware-Down SNMP-Traps Internal: 0x4000
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Current address: 00:05:85:75:8b:62, Hardware address: 00:05:85:75:8b:62
  Last flapped   : 2007-08-10 11:46:29 PDT (01:38:47 ago)
  Input rate     : 0 bps (0 pps)
  Output rate    : 0 bps (0 pps)
  Active alarms  : LINK
  Active defects : LINK
  PCS statistics                      Seconds
    Bit errors                             0
    Errored blocks                         0

Physical interface: xe-5/1/0-tx, Enabled, Physical link is Up
  Interface index: 158, SNMP ifIndex: 130
  Link-level type: Ethernet, MTU: 1514, LAN-PHY mode, Speed: 10Gbps,
  Unidirectional: Tx-Only
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x4000
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Current address: 00:05:85:75:8b:62, Hardware address: 00:05:85:75:8b:62
  Last flapped   : 2007-08-10 11:46:29 PDT (01:38:47 ago)
  Input rate     : 0 bps (0 pps)
  Output rate    : 0 bps (0 pps)

Configuring and Verifying a More Complex Example

The following example makes the following changes from a default configuration:

CLI Quick Configuration

To quickly configure the example described, copy the following commands and paste them into the router terminal window:

[edit]
set interfaces xe-5/1/0 framing wan-phy
set interfaces xe-5/1/0 unidirectional
set interfaces xe-5/1/0-rx mac 00:12:34:56:78:90
set interfaces xe-5/1/0-rx vlan-tagging unit 102 vlan-id 102 family inet address 10.1.102.2/24
set interfaces xe-5/1/0-tx vlan-tagging unit 201 vlan-id 201 family inet address 10.2.201.2/24 arp 10.2.201.3 mac 00:ab:cd:cd:ab:cd
set routing-options static route 10.33.1.1/32 next-hop 10.2.201.3

Configuration Results

Display the results of the configuration:

[edit]
user@host show interfaces
xe-5/1/0-rx {
vlan-tagging;
mac 00:12:34:56:78:90;
unit 102 {
vlan-id 102;
family inet {
address 10.10.102.2/24;
}
}
}
xe-5/1/0-tx {
vlan-tagging;
unit 201 {
vlan-id 201;
family inet {
address 10.2.201.2/24 {
arp 10.2.201.3 mac 00:ab:cd:cd:ab:cd;
}
}
}
}
xe-5/1/0 {
framing {
wan-phy;
}
unidirectional;
}

Detailed Interface Information

To display terse details about the interfaces:


user@host run show interfaces xe-5/1/0* terse
Interface               Admin Link Proto    Local                 Remote
xe-5/0/0                up    up
xe-5/0/0-rx             up    up
xe-5/0/0-rx.102         up    up   inet     1.1.102.2/24
                                   multiservice
xe-5/0/0-rx.32767       up    up   multiservice
xe-5/0/0-tx             up    up
xe-5/0/0-tx.201         up    up   inet     2.2.201.2/24
                                   multiservice
xe-5/0/0-tx.32767       up    up   multiservice

The additional logical interfaces for the unidirectional links result from the unit and VLAN tagging configuration.

To display more information about the interfaces:


user@host run show interfaces xe-5/1/0*
Physical interface: xe-5/1/0, Enabled, Physical link is Down
  Interface index: 151, SNMP ifIndex: 116
  Link-level type: Ethernet, MTU: 1514, Clocking: Internal, WAN-PHY mode, Speed: OC192, Unidirectional: Enabled, Loopback: None,
  Source filtering: Disabled, Flow control: Enabled
  Device flags   : Present Running Down
  Interface flags: Hardware-Down SNMP-Traps Internal: 0x4000
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Current address: 00:05:85:75:8b:39, Hardware address: 00:05:85:75:8b:39
  Last flapped   : 2007-08-10 08:50:40 PDT (00:05:00 ago)
  Active alarms  : LOF, LINK
  Active defects : LOF, SEF, AIS-L, AIS-P, LINK
  PCS statistics                      Seconds
    Bit errors                             0
    Errored blocks                         0

Physical interface: xe-5/1/0-rx, Enabled, Physical link is Down
  Interface index: 153, SNMP ifIndex: 114
  Link-level type: Ethernet, MTU: 1518, WAN-PHY mode, Speed: OC192, Unidirectional: Rx-Only
  Device flags   : Present Running Down
  Interface flags: Hardware-Down SNMP-Traps Internal: 0x4000
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Current address: 00:12:34:56:78:90, Hardware address: 00:05:85:75:8b:39
  Last flapped   : 2007-08-10 08:50:40 PDT (00:05:00 ago)
  Input rate     : 0 bps (0 pps)
  Output rate    : 0 bps (0 pps)
  Active alarms  : LOF, LINK
  Active defects : LOF, SEF, AIS-L, AIS-P, LINK
  PCS statistics                      Seconds
    Bit errors                             0
    Errored blocks                         0

  Logical interface xe-5/1/0-rx.102 (Index 70) (SNMP ifIndex 115) 
    Flags: Device-Down SNMP-Traps 0x4000 VLAN-Tag [ 0x8100.102 ]  Encapsulation: ENET2
    Input packets : 0 
    Output packets: 0
    Protocol inet, MTU: 1500
      Addresses, Flags: Dest-route-down Is-Preferred Is-Primary
        Destination: 10.1.102/24, Local: 10.1.102.2, Broadcast: 10.1.102.255
    Protocol multiservice, MTU: Unlimited
      Flags: None

  Logical interface xe-5/1/0-rx.32767 (Index 71) (SNMP ifIndex 124) 
    Flags: Device-Down SNMP-Traps 0x4000 VLAN-Tag [ 0x0000.0 ]  Encapsulation: ENET2
    Input packets : 0 
    Output packets: 0
    Protocol multiservice, MTU: Unlimited
      Flags: None

Physical interface: xe-5/1/0-tx, Enabled, Physical link is Up
  Interface index: 158, SNMP ifIndex: 125
  Link-level type: Ethernet, MTU: 1518, WAN-PHY mode, Speed: OC192, Unidirectional: Tx-Only
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x4000
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Current address: 00:05:85:75:8b:39, Hardware address: 00:05:85:75:8b:39
  Last flapped   : 2007-08-10 08:50:40 PDT (00:05:00 ago)
  Input rate     : 0 bps (0 pps)
  Output rate    : 0 bps (0 pps)

  Logical interface xe-5/1/0-tx.201 (Index 72) (SNMP ifIndex 126) 
    Flags: SNMP-Traps 0x4000 VLAN-Tag [ 0x8100.201 ]  Encapsulation: ENET2
    Input packets : 0 
    Output packets: 0
    Protocol inet, MTU: 1500
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 10.2.201/24, Local: 10.2.201.2, Broadcast: 10.2.201.255
    Protocol multiservice, MTU: Unlimited
      Flags: None

  Logical interface xe-5/1/0-tx.32767 (Index 73) (SNMP ifIndex 127) 
    Flags: SNMP-Traps 0x4000 VLAN-Tag [ 0x0000.0 ]  Encapsulation: ENET2
    Input packets : 0 
    Output packets: 0
    Protocol multiservice, MTU: Unlimited
      Flags: None

You can use the show interfaces xe-5/1/0* extensive command to display the most complete set of information about the interfaces. Alternatively, you can specify only xe-5/1/0, xe-5/1/0-rx, or xe-5/1/0-tx to show extensive information about just one interface.

The extensive output includes statistics for the interfaces. The following excerpts show the differences between the receive-only and transmit-only interfaces for statistics.

In the following output for a receive-only interface, input statistics are recorded, but all output statistics have a value of zero.


user@host show interfaces xe-7/0/0-rx extensive
Physical interface: xe-7/0/0-rx, Enabled, Physical link is Up
  Interface index: 174, SNMP ifIndex: 118, Generation: 175
  Link-level type: Ethernet, MTU: 1514, LAN-PHY mode, Speed: 10Gbps, Unidirectional: Rx-Only
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x4000
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: 00:05:85:73:e4:83, Hardware address: 00:05:85:73:e4:83
  Last flapped   : 2007-06-01 09:08:22 PDT (3d 02:31 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :      322857456303482           9627496104 bps
   Output bytes  :                    0                    0 bps
   Input  packets:         328775413751              1225495 pps
   Output packets:                    0                    0 pps

...

  Filter statistics:
    Input packet count            328775015056
    Input packet rejects                     1
    Input DA rejects                         0

...

  Logical interface xe-7/0/0-rx.0 (Index 72) (SNMP ifIndex 120) (Generation 138)
    Flags: SNMP-Traps Encapsulation: ENET2
    Traffic statistics:
     Input  bytes  :      322857456303482
     Output bytes  :                    0
     Input  packets:         328775413751
     Output packets:                    0

...

Transit statistics:
     Input  bytes  :      322857456303482           9627496104 bps
     Output bytes  :                    0                    0 bps
     Input  packets:         328775413751              1225495 pps
     Output packets:                    0                    0 pps

...

In the following output for a transmit-only interface, output statistics are recorded, but all input statistics have a value of zero.


user@host> show interfaces xe-7/0/0-tx extensive
Physical interface: xe-7/0/0-tx, Enabled, Physical link is Up
  Interface index: 176, SNMP ifIndex: 137, Generation: 177
  Link-level type: Ethernet, MTU: 1514, LAN-PHY mode, Speed: 10Gbps, Unidirectional: Tx-Only
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x4000
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: 00:05:85:73:e4:83, Hardware address: 00:05:85:73:e4:83
  Last flapped   : 2007-06-01 09:08:19 PDT (3d 02:31 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                    0                    0 bps
   Output bytes  :      322891152287160           9627472888 bps
   Input  packets:                    0                    0 pps
   Output packets:         328809727380              1225492 pps

...

  Filter statistics:
    Output packet count           328810554250
    Output packet pad count                  0
    Output packet error count                0

...

  Logical interface xe-7/0/0-tx.0 (Index 73) (SNMP ifIndex 138) (Generation 139)
    Flags: SNMP-Traps Encapsulation: ENET2
    Traffic statistics:
     Input  bytes  :                    0
     Output bytes  :      322891152287160
     Input  packets:                    0
     Output packets:         328809727380

...

Transit statistics:
     Input  bytes  :                    0                    0 bps
     Output bytes  :      322891152287160           9627472888 bps
     Input  packets:                    0                    0 pps
     Output packets:         328809727380              1225492 pps

...

Related Topics

For more information about concepts associated with unidirectional links, see the following resource:

[ Contents] [ Prev] [ Next] [ Index] [ Report an Error]