---
name: "SNMP::Info::Layer3::Netscreen"
section: "3pm"
platform: "linux"
package: "libsnmp-info-perl"
version: "3.972002-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/SNMP::Info::Layer3::Netscreen"
---

# SNMP::Info::Layer3::Netscreen(3pm)

SNMP Interface to Juniper Netscreen Devices

## NAME

SNMP::Info::Layer3::Netscreen - SNMP Interface to Juniper Netscreen Devices

## AUTHOR

Kent Hamilton

## SYNOPSIS

```
    #Let SNMP::Info determine the correct subclass for you.
    my $netscreen = new SNMP::Info(
                          AutoSpecify => 1,
                          Debug       => 1,
                          DestHost    => 'myswitch',
                          Community   => 'public',
                          Version     => 2
                        )
    or die "Can't connect to DestHost.\n";
    my $class = $netscreen->class();
    print "SNMP::Info determined this device to fall under subclass : $class\n";
```

## DESCRIPTION

Provides abstraction to the configuration information obtainable from a Juniper Netscreen device through SNMP.

### Inherited Classes

- SNMP::Info::Layer3

  - SNMP::Info::IEEE802dot11

  ### Required MIBs

- *NETSCREEN-SMI*

  - *NETSCREEN-PRODUCTS-MIB*

  - *NETSCREEN-INTERFACE-MIB*

  - *NETSCREEN-SET-GEN-MIB*

  - *NETSCREEN-IP-ARP-MIB*

  - Inherited Classes' MIBs

  See "Required MIBs" in SNMP::Info::Layer3 for its MIB requirements.

  See "Required MIBs" in SNMP::Info::IEEE802dot11 for its MIB requirements.

## GLOBALS

These are methods that return scalar value from SNMP

- $netscreen-\>**model()**

  Tries to reference `$netscreen`-\>**id()** to *NETSCREEN-PRODUCTS-MIB*

- $netscreen-\>**vendor()**

  Returns `'juniper'`

- $netscreen-\>**os()**

  Returns `'screenos'`

- $netscreen-\>**os\_ver()**

  Extracts the OS version from the description string.

- $netscreen-\>**serial()**

  Returns serial number.

### Overrides

- $netscreen-\>**layers()**

  Returns 01001110.  Device doesn't report layers properly, modified to reflect Layer 2 and 3 functionality.

### Globals imported from SNMP::Info::Layer3

See "GLOBALS" in SNMP::Info::Layer3 for details.

### Globals imported from SNMP::Info::IEEE802dot11

See "GLOBALS" in SNMP::Info::IEEE802dot11 for details.

## TABLE METHODS

These are methods that return tables of information in the form of a reference to a hash.

### Overrides

*Interface Information*

- $netscreen-\>**interfaces()**

  Creates a map between the interface identifier (iid) and the physical port name.

  Defaults to `"insIfDescr"` if available, uses `"nsIfName"` if not.

- $netscreen-\>**i\_description()**

  Description of the interface. Uses `"insIfDescr"` if available, `"nsIfName"` if not.

- $netscreen-\>**i\_index()**

  Default SNMP IID to Interface index.

  (`"nsIfIndex"`)

- $netscreen-\>**i\_lastchange()**

  The value of `"sysUpTime"` when this port last changed states (up,down), maps from `"ifIndex"` to `"nsIfIndex"`.

  (`"ifLastChange"`)

- $netscreen-\>**i\_mac()**

  MAC address of the interface.  Note this is just the MAC of the port, not anything connected to it.  Uses `"nsIfMAC"` if available, `"ifPhysAddress"` if not.

- $netscreen-\>**i\_mtu()**

  INTEGER. Interface MTU value, maps from `"ifIndex"` to `"nsIfIndex"`.

  (`"ifMtu"`)

- $netscreen-\>**i\_name()**

  Interface Name field.

  (`"nsIfName"`)

- $netscreen-\>**i\_speed()**

  Speed of the link, maps from `"ifIndex"` to `"nsIfIndex"`.

- $netscreen-\>**i\_type()**

  Interface type.  Maps from `"ifIndex"` to `"nsIfIndex"`.

  (`"ifType"`)

- $netscreen-\>**i\_up()**

  Link Status of the interface.  Typical values are 'up' and 'down'.

  (`"nsIfStatus"`)

- $netscreen-\>**i\_up\_admin()**

  Administrative status of the port.  Checks both `"ifAdminStatus"` and `"nsIfStatus"`.

*IP Address Table*

Each entry in this table is an IP address in use on this device.

- $netscreen-\>**ip\_index()**

  Maps the IP Table to the IID

- $netscreen-\>**ip\_table()**

  Maps the Table to the IP address

  (`"nsIfIp"`)

- $netscreen-\>**ip\_netmask()**

  Gives netmask setting for IP table entry.

  (`"nsIfNetmask"`)

*Forwarding Table*

Uses `"nsIpArpTable"` to emulate the forwarding table.

- $netscreen-\>**fw\_index()**

  Maps the Forwarding Table to the IID

- $netscreen-\>**fw\_mac()**

  Returns reference to hash of forwarding table MAC Addresses.

- $netscreen-\>**fw\_port()**

  Returns reference to hash of forwarding table entries port interface identifier (IID).

- $netscreen-\>**bp\_index()**

  Returns reference to hash of bridge port table entries map back to interface identifier (IID).

### Arp Cache Table

- $netscreen-\>**at\_index()**

  Returns reference to hash.  Maps ARP table entries to Interface IIDs

  If the device doesn't support `"ipNetToMediaIfIndex"`, this will try the proprietary `"nsIpArpIfIdx"`.

- $netscreen-\>**at\_paddr()**

  Returns reference to hash.  Maps ARP table entries to MAC addresses.

  If the device doesn't support `"ipNetToMediaPhysAddress"`, this will try the proprietary `"nsIpArpMac"`.

- $netscreen-\>**at\_netaddr()**

  Returns reference to hash.  Maps ARP table entries to IP addresses.

  If the device doesn't support `"ipNetToMediaNetAddress"`, this will try the proprietary `"nsIpArpIp"`.

*Wireless Information*

- $dot11-\>**i\_ssidlist()**

  Returns reference to hash.  SSID's recognized by the radio interface. Remaps from `"ifIndex"` to `"nsIfIndex"`.

  (`"dot11DesiredSSID"`)

- $dot11-\>**i\_80211channel()**

  Returns reference to hash.  Current operating frequency channel of the radio interface.  Remaps from `"ifIndex"` to `"nsIfIndex"`.

### Table Methods imported from SNMP::Info::Layer3

See "TABLE METHODS" in SNMP::Info::Layer3 for details.

### Table Methods imported from SNMP::Info::IEEE802dot11

See "TABLE METHODS" in SNMP::Info::IEEE802dot11 for details.