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    Monitoring Routing Information

    Purpose

    Use the monitoring functionality to view the inet.0 routing table on the routing device.

    Action

    To view the routing tables in the J-Web interface, select Monitor > Routing > Route Information. Apply a filter or a combination of filters to view messages. You can use filters to display relevant events.

    To view the routing table in the CLI, enter the following commands in the CLI interface:

    • show route terse
    • show route detail

    Meaning

    Table 1 describes the different filters, their functions, and the associated actions.

    Table 2 summarizes key output fields in the routing information display.

    Table 1: Filtering Route Messages

    Field

    Function

    Your Action

    Destination Address

    Specifies the destination address of the route.

    Enter the destination address.

    Protocol

    Specifies the protocol from which the route was learned.

    Enter the protocol name.

    Next hop address

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

    Enter the next hop address.

    Receive protocol

    Specifies the dynamic routing protocol used when the routing information was received through a particular neighbor.

    Enter the routing protocol.

    Best route

    Specifies only the best route available.

    Select the view details of the best route.

    Inactive routes

    Specifies the inactive routes.

    Select the view details of inactive routes.

    Exact route

    Specifies the exact route.

    Select the view details of the exact route.

    Hidden routes

    Specifies the hidden routes.

    Select the view details of hidden routes.

    Search

    Applies the specified filter and displays the matching messages.

    To apply the filter and display messages, click Search.

    Table 2: Summary of Key Routing Information Output Fields

    Field

    Values

    Additional Information

    Static Route Addresses

    The list of static route addresses.

     

    Protocol

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

     

    Preference

    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 active.

     

    State

    Flags for this route.

    There are many possible flags.

    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.
     
     

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    Published: 2013-08-15