All MIBs › Fore-Switch-MIB › nsapTopoLinkSrcMask
nsapTopoLinkSrcMask
Module: Fore-Switch-MIB
OID (symbolic): Fore-Switch-MIB::nsapTopoLinkSrcMask
OID (numeric): 1.3.6.1.4.1.326.2.2.2.1.9.3.1.3
Node type: OBJECT-TYPE
Type: Integer32
Access: read-only
Description: The value of this object identifies the mask that is used for the link source NSAP (Network Service Access Point) address. The mask identifies the number of bits in the NSAP address that are valid. The value of the mask object is in the range 0-160 (160 bits is the size of an NSAP address).
What is nsapTopoLinkSrcMask?
This read-only object specifies the prefix length (0 to 160 bits) that indicates how many bits of an NSAP (Network Service Access Point) address are valid for identifying a link source in ISO network topology. The mask value determines which portion of the 160-bit NSAP address is the network prefix and which portion identifies individual nodes. Network operators use this when working with ISO routing protocols (like IS-IS) to understand address allocation and validate that NSAP prefix configurations match the network topology design.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.326.2.2.2.1.9.3.1.3 snmpwalk -v2c -c public <target> Fore-Switch-MIB::nsapTopoLinkSrcMask
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.326.2.2.2.1.9.3.1.3.1 snmpget -v2c -c public <target> Fore-Switch-MIB::nsapTopoLinkSrcMask.1
Start monitoring Fore Systems (later Marconi) ForeRunner ATM switch (board/port/VPI-VCI inventory) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the Fore-Switch-MIB::nsapTopoLinkSrcMask OID value, configure state conditions and alerts, and monitor any Fore Systems (later Marconi) ForeRunner ATM switch (board/port/VPI-VCI inventory) from a single console.
OID Breakdown
Upper-level ancestors (11 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.326 | fore | COMMON-GOLF-MIB |
| 1.3.6.1.4.1.326.2 | systems | COMMON-GOLF-MIB |
| 1.3.6.1.4.1.326.2.2 | atmSwitch | Fore-Common-MIB |
| 1.3.6.1.4.1.326.2.2.2 | software | Fore-Common-MIB |
| 1.3.6.1.4.1.326.2.2.2.1 | asxd | Fore-Common-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.326.2.2.2.1.9 | nsapGroup | Fore-Switch-MIB |
| 1.3.6.1.4.1.326.2.2.2.1.9.3 | nsapTopologyTable | Fore-Switch-MIB |
| 1.3.6.1.4.1.326.2.2.2.1.9.3.1 | nsapTopologyEntry | Fore-Switch-MIB |
| 1.3.6.1.4.1.326.2.2.2.1.9.3.1.3 | nsapTopoLinkSrcMask | Fore-Switch-MIB |