Juniper Networks J-Series Monitoring BGP Routing Information, Show bgp summary Show bgp neighbor

Chapter 7: Monitoring the Router and Routing Operations

Table 52: Summary of Key Routing Information Output Fields (continued)

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

Age	How long the route has been known.
State	Flags for this route.
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.

Additional Information

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).

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

Monitoring BGP Routing Information

To view BGP routing information, select Monitor>Routing>BGP Information, or enter the following CLI commands:

■show bgp summary

■show bgp neighbor

Table 53 on page 117 summarizes key output fields in the BGP routing display.

Table 53: Summary of Key BGP Routing Output Fields

Field	Values	Additional Information
BGP Summary
Groups	Number of BGP groups.
Peers	Number of BGP peers.

Using the Monitoring Tools ■ 117