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Configuring Proxy ARP

In this example, you will configure proxy Address Resolution Protocol (ARP) on the Gigabit Ethernet interface ge-0/0/3 that is on the same subnet as that of the TGM550.

For information about configuring proxy ARP, see the JUNOS Network Interfaces Configuration Guide.

To configure proxy ARP on the ge-0/0/3 interface:

  1. Enter operational mode in the CLI.
  2. Enter the following command to know the MAC address of the ge-0/0/3 interface.
    user@host> show interfaces ge-0/0/3 
    Physical interface: ge-0/0/3, Enabled, Physical link is Up
  Interface index: 140, SNMP ifIndex: 27
  Link-level type: Ethernet, MTU: 1514, Speed: 1000mbps, Loopback: Disabled,
  Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled,
  Remote fault: Online
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x4000
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Current address: 00:ff:85:7f:78:03, Hardware address: 00:ff:85:7f:78:03
  Last flapped   : 2006-10-02 23:49:32 PDT (05:51:40 ago)
  Input rate     : 0 bps (0 pps)
  Output rate    : 0 bps (0 pps)
  Active alarms  : None
  Active defects : None

  Logical interface ge-0/0/3.0 (Index 69) (SNMP ifIndex 26) 
    Flags: SNMP-Traps Encapsulation: ENET2
    Protocol inet, MTU: 1500
      Flags: None
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 12.1.1/24, Local: 12.1.1.1, Broadcast: 12.1.1.255

    The Hardware address field in the output displays the MAC address of the ge-0/0/3 interface. Note the MAC address 00:ff:85:7f:78:03 of the interface.

  3. Navigate to the top of the interfaces configuration hierarchy in either the J-Web or CLI configuration editor.
  4. Perform the configuration tasks described in Table 115.
  5. If you are finished configuring the router, commit the configuration.

Table 115: Configuring Proxy ARP

Task

J-Web Configuration Editor

CLI Configuration Editor

Navigate to the Interfaces level in the configuration hierarchy.

  1. In the J-Web interface, select Configuration>Edit Configuration>View and Edit.
  2. Next to Interfaces, click Edit.

From the [edit] hierarchy level, enter

edit interfaces ge-0/0/3

Select the Gigabit Ethernet interface ge-0/0/3

In the Interface name column, click ge-0/0/3.

Configure proxy ARP on logical unit 0 with the source address 12.1.1.1/24 on the ge-0/0/3 interface.
  1. Under Unit, next to 0, click Edit.
  2. Under Family, next to Inet, click Edit.
  3. Under Address, next to 12.1.1.1/24, click Edit.
  4. Next to Arp, click Add new entry.
  5. In the Address box, type the IP address of the TGM550—for example, 12.1.1.3.
  6. Select the Publish check box.
  7. From the Mac address type list, select Mac.
  8. In the Mac box, type the MAC address 00:ff:85:7f:78:03 of the ge-0/0/3 interface.
  9. Click OK until you return to the Interfaces page.
  1. Enter

    edit unit 0

  2. Enter

    edit family inet address 12.1.1.1/24

  3. Enter

    set arp 12.1.1.3 mac 00:ff:85:7f:78:03 publish

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