Monitoring Route Information

n destinations

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

n routes

Number of routes in the routing table:

• active—Number of routes that are active.
• holddown—Number of routes that are in hold-down state (neither advertised nor updated) before being declared inactive.
• hidden—Number of routes not used because of routing policies configured on the device.

Destination

Destination address of the route.

Protocol/ Preference

Protocol from which the route was learned: Static, Direct, Local, or the name of a particular protocol.

The preference is the individual preference value for the route.

The route preference is used as one of the route selection criteria.

Next-Hop

Network layer address of the directly reachable neighboring system (if applicable) and the interface used to reach it.

If a next hop is listed as Discard, all traffic with that destination address is discarded rather than routed. This value generally means that the route is a static route for which the discard attribute has been set.

If a next hop is listed as Reject, all traffic with that destination address is rejected. This value generally means that the address is unreachable. For example, if the address is a configured interface address and the interface is unavailable, traffic bound for that address is rejected.

If a next hop is listed as Local, the destination is an address on the host (either the loopback address or Ethernet management port 0 address, for example).

Age

How long the route has been known.

State

Flags for this route.

There are many possible flags. For a complete description, see the JUNOS Interfaces Command Reference.

AS Path

AS path through which the route was learned. The letters of the AS path indicate the path origin:

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