All MIBs › CTRON-LINE-STATISTICS-MIB › lsLayer1AIS
lsLayer1AIS
Module: CTRON-LINE-STATISTICS-MIB
OID (symbolic): CTRON-LINE-STATISTICS-MIB::lsLayer1AIS
OID (numeric): 1.3.6.1.4.1.52.4497.21.1.7
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-only
Description: The number of times Layer 1 has qualified an Alarm Indication Signal. AIS is also known as a Blue alarm.
What is lsLayer1AIS?
This counter reports how many times Layer 1 has qualified an Alarm Indication Signal, also known as a Blue alarm, on this WAN line. An AIS is a keep-alive-style all-ones signal sent by upstream equipment to indicate a failure further up the transmission path, so a growing lsLayer1AIS count tells an admin the fault likely lies upstream in the carrier network rather than at this device. An admin seeing lsLayer1AIS increase across multiple lines simultaneously would suspect a shared upstream carrier facility failure rather than a problem with this particular device.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.52.4497.21.1.7 snmpwalk -v2c -c public <target> CTRON-LINE-STATISTICS-MIB::lsLayer1AIS
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.52.4497.21.1.7.1 snmpget -v2c -c public <target> CTRON-LINE-STATISTICS-MIB::lsLayer1AIS.1
Start monitoring Cabletron WAN router/switch (T1/E1 line statistics) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the CTRON-LINE-STATISTICS-MIB::lsLayer1AIS OID value, configure state conditions and alerts, and monitor any Cabletron WAN router/switch (T1/E1 line statistics) from a single console.
OID Breakdown
Upper-level ancestors (10 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 |
| 1.3.6.1.4.1.52 | cabletron | Cabletron-MIB |
| 1.3.6.1.4.1.52.4497 | ctSSA | CT-DARADIUS-MIB |
| 1.3.6.1.4.1.52.4497.21 | ctDsx0Mib | CT-DS0ent-MIB |
| 1.3.6.1.4.1.52.4497.21.1 | ctDsx0ConfigTable | CT-DS0ent-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.52.4497.21.1.7 | lsLayer1AIS | CTRON-LINE-STATISTICS-MIB |