All MIBs › IPFRR-MIB › ipFrrAltType
ipFrrAltType
Module: IPFRR-MIB
OID (symbolic): IPFRR-MIB::ipFrrAltType
OID (numeric): 1.3.6.1.2.1.4.999.1.2.1.4
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-create
Description: The type of alternate which is provided by the alternate next-hop. The supported types are as follows:
equalCost : The alternate next-hop is another primary next-hop.
loopFree : The shortest route to the destination IP address from the alternate next-hop does not traverse this system. See draft-ietf-rtgwg-ipfrr-spec-base-04.
uTurn : The alternate next system, which is indicated by the alternate next-hop, has itself a primary path that traverses this system but also has an alternate next-hop for this route that does not traverse this system. See draft-atlas-ip-local-protect-uturn-02.
other : The mechanism by which the alternate next-hop can be used is not specified.
What is ipFrrAltType?
Classifies the mechanism behind this alternate next-hop: equalCost (another primary path), loopFree (a path that provably doesn't loop back through this router), uTurn (a next-hop whose own alternate avoids this router), or other. Admins use this to understand how robust a given backup path is - a loopFree or uTurn alternate is specifically computed to survive the primary next-hop's failure, while equalCost simply reuses an existing ECMP path. Seeing ipFrrAltType report loopFree(3) for a route's backup tells an admin the alternate was purpose-computed for fast-reroute rather than incidentally shared with an equal-cost primary path.
OID Breakdown
Upper-level ancestors (7 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 |
| 1.3.6.1.2 | mgmt | APERTUS-NPG-MIB |
| 1.3.6.1.2.1 | mib_2 | AXON-MIB |
| 1.3.6.1.2.1.4 | ip | CHECKPOINT-MIB-2 |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.2.1.4.999 | ipFrrMIB | IPFRR-MIB |
| 1.3.6.1.2.1.4.999.1 | ipFrrMIBObjects | IPFRR-MIB |
| 1.3.6.1.2.1.4.999.1.2 | ipFrrAltTable | IPFRR-MIB |
| 1.3.6.1.2.1.4.999.1.2.1 | ipFrrAltEntry | IPFRR-MIB |
| 1.3.6.1.2.1.4.999.1.2.1.4 | ipFrrAltType | IPFRR-MIB |