show route extensive

routing-table-name

Name of the routing table (for example, inet.0).

number destinations

Number of destinations for which there are routes in the routing table.

number routes

Number of routes in the routing table and total number of routes in the following states:

• active (routes that are active).
• holddown (routes that are in the pending state before being declared inactive).
• hidden (routes that are not used because of a routing policy).

route-destination (entry, announced)

Route destination (for example:10.0.0.1/24). The entry value is the number of route for this destination, and the announced value is the number of routes being announced for this destination. Sometimes the route destination is presented in another format, such as:

• MPLS-label (for example, 80001 ).
• interface-name (for example, ge-1/0/2 ).
• neighbor-address:control-word-status:encapsulation type:vc-id:source (Layer 2 circuit only; for example, 10.1.1.195:NoCtrlWord:1:1:Local/96).

• neighbor-address—Address of the neighbor.

• control-word-status—Whether the use of the control word has been negotiated for this virtual circuit: NoCtrlWord or CtrlWord.

• encapsulation type—Type of encapsulation, represented by a number: (1) Frame Relay DLCI, (2) ATM AAL5 VCC transport, (3) ATM transparent cell transport, (4) Ethernet, (5) VLAN Ethernet, (6) HDLC, (7) PPP, (8) ATM VCC cell transport, (10) ATM VPC cell transport.

• vc-id—Virtual circuit identifier.

• source—Source of the advertisement: Local or Remote.

TSI

Protocol header information.

label stacking

(Next-to-the-last-hop router for MPLS only) Depth of the Multiprotocol Label Switching (MPLS) label stack, where the label-popping operation is needed to remove one or more labels from the top of the stack. A pair of routes is displayed, because the pop operation is performed only when the stack depth is two or more labels.

• S=0 route indicates that a packet with an incoming label stack depth of two or more exits this router with one fewer label (the label-popping operation is performed).
• If there is no S= information, the route is a normal MPLS route, which has a stack depth of 1 (the label-popping operation is not performed).

[protocol, preference]

Protocol from which the route was learned and the preference value for the route.

• +—A plus sign indicates the active route, which is the route installed from the routing table into the forwarding table.
• - —A hyphen indicates the last active route.
• *—An asterisk indicates that the route is both the active and the last active route. An asterisk before a to line indicates the best subpath to the route.

In every routing metric except for the BGP LocalPref attribute, a lesser value is preferred. In order to use common comparison routines, JUNOS Software stores the 1's complement of the LocalPref value in the Preference2 field. For example, if the LocalPref value for Route 1 is 100, the Preference2 value is -101. If the LocalPref value for Route 2 is 155, the Preference2 value is -156. Route 2 is preferred because it has a higher LocalPref value and a lower Preference2 value.

Level

(IS-IS only). In IS-IS, a single autonomous system (AS) can be divided into smaller groups called areas. Routing between areas is organized hierarchically, allowing a domain to be administratively divided into smaller areas. This organization is accomplished by configuring Level 1 and Level 2 intermediate systems. Level 1 systems route within an area; when the destination is outside an area, they route toward a Level 2 system. Level 2 intermediate systems route between areas and toward other ASs.

Route Distinguisher

IP subnet augmented with a 64-bit prefix.

Next-hop type

Type of next hop. For a description of possible values for this field, see .

Next-hop reference count

Number of references made to the next hop.

Source

IP address of the route source.

Next hop

Network layer address of the directly reachable neighboring system.

via

Interface used to reach the next hop If there is more than one interface available to the next hop, the name of interface that is actually used is followed by the word Selected. This field can also contain the following information:

• Weight—Value used to distinguish primary, secondary, and fast reroute backup routes. Weight information is available when Multiprotocol Label Switching (MPLS) label-switched path (LSP) link protection, node-link protection, or fast reroute is enabled, or when the standby state is enabled for secondary paths. A lower weight value is preferred. Among routes with the same weight value, load balancing is possible.
• Balance—Balance coefficient indicating how traffic of unequal cost is distributed among next hops when a router is performing unequal-cost load balancing. This information is available when you enable Border Gateway Protocol (BGP) multipath load balancing.

Label-switched-path lsp-path-name

Name of the label-switched path (LSP) used to reach the next hop.

Label operation

MPLS label and operation occurring at this router. The operation can be pop (where a label is removed from the top of the stack), push (where another label is added to the label stack), or swap (where a label is replaced by another label).

Offset

Whether the metric has been increased or decreased by an offset value.

Interface

(Local only) Local interface name.

Protocol next hop

Network layer address of the remote router that advertised the prefix. This address is used to recursively derive a forwarding next hop.

label-operation

MPLS label and operation occurring at this router. The operation can be pop (where a label is removed from the top of the stack), push (where another label is added to the label stack), or swap (where a label is replaced by another label).

Indirect next hops

When present, a list of nodes that are used to resolve the path to the next-hop destination, in the order that they are resolved.

State

State of the route (a route can be in more than one state). See .

Inactive reason

If the route is inactive, the reason for its current state is indicated. Typical reasons include:

• Active preferred—Currently active route was selected over this route.
• Always compare MED—Path with a lower multiple exit discriminator (MED) is available.
• AS path—Shorter AS path is available.
• Cisco Non-deterministic MED selection—Cisco nondeterministic MED is enabled and a path with a lower MED is available.
• Cluster list length—Path with a shorter cluster list length is available.
• Forwarding use only—Path is only available for forwarding purposes.
• IGP metric—Path through the next hop with a lower IGP metric is available.
• IGP metric type—Path with a lower OSPF link-state advertisement type is available.
• Interior > Exterior > Exterior via Interior—Direct, static, IGP, or EBGP path is available.
• Local preference—Path with a higher local preference value is available.
• Next hop address—Path with a lower metric next hop is available.
• No difference—Path from a neighbor with a lower IP address is available.
• Not Best in its group—Occurs when multiple peers of the same external AS advertise the same 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.
• Origin—Path with a lower origin code is available.
• OSPF version—Path does not support the indicated OSPF version.
• RIB preference—Route from a higher-numbered routing table is available.
• Route destinguisher—64-bit prefix added to IP subnets to make them unique.
• Route metric or MED comparison—Route with a lower metric or MED is available.
• Route preference—Route with a lower preference value is available.
• 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.

Local AS

Autonomous system (AS) number of the local router.

Age

How long the route has been known.

Metric

Cost value of the indicated route. For routes within an AS, the cost is determined by IGP and the 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.

Task

Name of the protocol that has added the route.

Announcement bits

List of protocols that announce this route. n-Resolve inet indicates that the route is used for route resolution for next hops found in the routing table n is an index used by Juniper Networks Customer Support only.

AS path

AS path through which the route was learned. The letters at the end of the AS path indicate the path origin, providing an indication of the state of the route at the point at which the AS path was originated:

• I—IGP.
• E—EGP.
• ?—Incomplete; typically, the AS path was aggregated.

When AS path numbers are included in the route, the format is as follows:

• [ ]—Brackets enclose the local AS number associated with the AS path if more than one AS number is configured on the router, or if AS path prepending is configured.
• { }—Braces enclose AS sets, which are groups of AS numbers in which the order does not matter. A set commonly results from route aggregation. The numbers in each AS set are displayed in ascending order.
• ( )—Parentheses enclose a confederation.
• ( [ ] )—Parentheses and brackets enclose a confederation set.

AS path: I <Originator>

(For router reflected output only) Originator ID attribute set by the route reflector.

VC Label

MPLS label assigned to the Layer 2 circuit virtual connection.

MTU

Maximum transmission unit (MTU) of the Layer 2 circuit.

VLAN ID

VLAN identifier of the Layer 2 circuit.

Cluster list

(For router reflected output only) Cluster ID sent by the route reflector.

Originator ID

(For router reflected output only) Address of router that originally sent the route to the route reflector.

Prefixes bound to route

Forwarding Equivalent Class (FEC) bound to this route. Applicable only to routes installed by LDP.

Communities

Community path attribute for the route. See for all possible values for this field.

Layer2-info: encaps

Layer 2 encapsulation (for example, VPLS).

control flags

Control flags: none or Site Down.

mtu

Maximum transmission unit (MTU) information.

Label-Base, range

First label in a block of labels and label block size. A remote PE router uses this first label when sending traffic toward the advertising PE router.

status vector

Layer 2 VPN and VPLS network layer reachability information (NLRI).

Localpref

Local preference value included in the route.

Router ID

BGP router ID as advertised by the neighbor in the open message.

Primary Routing Table

In a routing table group, the name of the primary routing table in which the route resides.

Secondary Tables

In a routing table group, the name of one or more secondary tables in which the route resides.

Originating RIB

Name of the routing table whose active route was used to determine the forwarding next-hop entry in the resolution database. For example, in the case of inet.0 resolving via inet.0 and inet.3, this field indicates which routing table, inet.0 or inet.3, provided the best path for a particular prefix.

Node path count

Number of nodes in the path.

Forwarding nexthops

Number of forwarding next hops. The forwarding next hop is the network layer address of the directly reachable neighboring system (if applicable) and the interface used to reach it.