Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 2547

Table 328: show route extensive Output Fields (continued)
Field Name Field Description
State of the route (a route can be in more than one state). See the Output Field table in the show
State
route detail command.
Inactive reason If the route is inactive, the reason for its current state is indicated. Typical reasons include:
Autonomous system (AS) number of the local routing device.
Local AS
How long the route has been known.
Age
Cost value of the indicated route. For routes within an AS, the cost is determined by IGP and the
Metric
individual protocol metrics. For external routes, destinations, or routing domains, the cost is determined
by a preference value.
Metric value for BGP path selection to which the IGP cost to the next-hop destination has been added.
MED-plus-IGP
For MPLS LSPs, state of the TTL propagation attribute. Can be enabled or disabled for all
TTL-Action
RSVP-signalled and LDP-signalled LSPs or for specific VRF routing instances.
For sample output, see
Copyright © 2010, Juniper Networks, Inc.
Active preferred —Currently active route was selected over this route.
—Path with a lower multiple exit discriminator (MED) is available.
Always compare MED
—Shorter AS path is available.
AS path
Cisco Non-deterministic MED selection
lower MED is available.
—Path with a shorter cluster list length is available.
Cluster list length
Forwarding use only —Path is only available for forwarding purposes.
IGP metric —Path through the next hop with a lower IGP metric is available.
—Path with a lower OSPF link-state advertisement type is available.
IGP metric type
Interior > Exterior > Exterior via Interior
—Path with a higher local preference value is available.
Local preference
—Path with a lower metric next hop is available.
Next hop address
No difference —Path from a neighbor with a lower IP address is available.
—Occurs when multiple peers of the same external AS advertise the same
Not Best in its group
prefix and are grouped together in the selection process. When this reason is displayed, an additional
reason is provided (typically one of the other reasons listed).
Number of gateways —Path with a higher number of next hops is available.
—Path with a lower origin code is available.
Origin
—Path does not support the indicated OSPF version.
OSPF version
—Route from a higher-numbered routing table is available.
RIB preference
Route destinguisher —64-bit prefix added to IP subnets to make them unique.
Route metric or MED comparison
—Route with a lower preference value is available.
Route preference
—Path through a neighbor with a lower ID is available.
Router ID
—Path is not usable because of one of the following conditions: the route is damped,
Unusable path
the route is rejected by an import policy, or the route is unresolved.
—Last tiebreaker is the lowest IP address value.
Update source
show route table
Chapter 80: Operational Commands for Layer 3 Protocols
—Cisco nondeterministic MED is enabled and a path with a
—Direct, static, IGP, or EBGP path is available.
—Route with a lower metric or MED is available.
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