Juniper EX3400 Features Manual page 438

DHCP and Other System Services Feature Guide for EX2300, EX3400, and EX4300 Switches
Table 25: show route extensive Output Fields (continued)
Field Name Field Description
If the route is inactive, the reason for its current state is indicated. Typical reasons include:
Inactive reason
Autonomous system (AS) number of the local routing device.
Local AS
How long the route has been known.
Age
Accumulated interior gateway protocol (AIGP) BGP attribute.
AIGP
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.
MED-plus-IGP Metric value for BGP path selection to which the IGP cost to the next-hop destination has been added.
TTL-Action For MPLS LSPs, state of the TTL propagation attribute. Can be enabled or disabled for all
RSVP-signaled and LDP-signaled LSPs or for specific VRF routing instances.
For sample output, see
418
—Currently active route was selected over this route.
Active preferred
—Path with a lower multiple exit discriminator (MED) is available.
Always compare MED
AS path —Shorter AS path is available.
Cisco Non-deterministic MED selection
lower MED is available.
Cluster list length —Path with a shorter cluster list length is available.
—Path is only available for forwarding purposes.
Forwarding use only
—Path through the next hop with a lower IGP metric is available.
IGP metric
—Path with a lower OSPF link-state advertisement type is available.
IGP metric type
Interior > Exterior > Exterior via Interior
Local preference —Path with a higher local preference value is available.
—Path with a lower metric next hop is available.
Next hop address
—Path from a neighbor with a lower IP address is available.
No difference
—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).
—Path with a higher number of next hops is available.
Number of gateways
—Path with a lower origin code is available.
Origin
OSPF version —Path does not support the indicated OSPF version.
RIB preference —Route from a higher-numbered routing table is available.
—64-bit prefix added to IP subnets to make them unique.
Route destinguisher
Route metric or MED comparison
—Route with a lower preference value is available.
Route preference
Router ID —Path through a neighbor with a lower ID is available.
Unusable path —Path is not usable because of one of the following conditions: the route is damped,
the route is rejected by an import policy, or the route is unresolved.
Update source —Last tiebreaker is the lowest IP address value.
show route table
—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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