All MIBs › CIENA-CES-MPLS-MIB › cienaCesMplsStaticIngressTunnelTTLPolicy
cienaCesMplsStaticIngressTunnelTTLPolicy
Module: CIENA-CES-MPLS-MIB
OID (symbolic): CIENA-CES-MPLS-MIB::cienaCesMplsStaticIngressTunnelTTLPolicy
OID (numeric): 1.3.6.1.4.1.1271.2.1.18.1.1.2.1.12
Node type: OBJECT-TYPE
Type: TTLPolicy
Access: read-only
Description: Specifies whether TTL is fixed or inherited from the frame.
What is cienaCesMplsStaticIngressTunnelTTLPolicy?
This object specifies whether the MPLS TTL for this static encap tunnel is set to a fixed value or inherited from the customer's original frame, as the description states. Choosing inherit lets the customer's real IP TTL propagate through the tunnel so traceroute-style tools behave correctly end-to-end, while choosing fixed deliberately hides the number of internal MPLS hops from anyone tracerouting through the network -- a topology-hiding choice some carriers make intentionally. For example, a carrier deliberately sets this to fixed specifically so a customer's traceroute never reveals how many internal hops their traffic actually traverses inside the MPLS core.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.1271.2.1.18.1.1.2.1.12 snmpwalk -v2c -c public <target> CIENA-CES-MPLS-MIB::cienaCesMplsStaticIngressTunnelTTLPolicy
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.1271.2.1.18.1.1.2.1.12.1 snmpget -v2c -c public <target> CIENA-CES-MPLS-MIB::cienaCesMplsStaticIngressTunnelTTLPolicy.1
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OID Breakdown
Upper-level ancestors (9 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 |
| 1.3.6.1.4.1.1271 | ciena | CIENA-SMI |
| 1.3.6.1.4.1.1271.2 | cienaCes | CIENA-SMI |
| 1.3.6.1.4.1.1271.2.1 | cienaCesConfig | CIENA-SMI |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.1271.2.1.18 | cienaCesMplsMIB | CIENA-CES-MPLS-MIB |
| 1.3.6.1.4.1.1271.2.1.18.1 | cienaCesMplsMIBObjects | CIENA-CES-MPLS-MIB |
| 1.3.6.1.4.1.1271.2.1.18.1.1 | cienaCesMpls | CIENA-CES-MPLS-MIB |
| 1.3.6.1.4.1.1271.2.1.18.1.1.2 | cienaCesMplsStaticIngressTunnelTable | CIENA-CES-MPLS-MIB |
| 1.3.6.1.4.1.1271.2.1.18.1.1.2.1 | cienaCesMplsStaticIngressTunnelEntry | CIENA-CES-MPLS-MIB |
| 1.3.6.1.4.1.1271.2.1.18.1.1.2.1.12 | cienaCesMplsStaticIngressTunnelTTLPolicy | CIENA-CES-MPLS-MIB |