Route Table

The IP route table is available from the main SNMP MIB Browser screen by selecting Route Table from the MIB Type drop-down list and pressing Get MIB. The IP route table contains an entry for each route presently known to this entity/managed node.

Figure 82. IP Route Table

The fields on the IP Route Table are:

Index

Route Interface Index. The index value, which uniquely identifies the local interface through which the next hop of this route should be reached. The interface identified by a particular value of this index is the same interface as identified by the same value of ifIndex.

Destination Address

Route Destination. The destination IP address of this route. An entry with a value of 0.0.0.0 is considered a default route. Multiple routes to a single destination can appear in the table, but access to such multiple entries is dependent on the table-access mechanisms defined by the network management protocol in use.

Metric1

Route Metric 1. The primary routing metric for this
route. The semantics of this metric are determined by the routing-protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1.

Metric2

Route Metric 2. An alternate routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1.

Metric3

Route Metric 3. An alternate routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1.

Metric4

Route Metric 4. An alternate routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1.

Next Hop

Route Next Hop. The IP address of the next hop of this route. (In the case of a route bound to an interface that is realized via a broadcast media, the value of this field is the agent's IP address on that interface.)

Type

Route Type. The type of route. Note that the values Direct(3) and Indirect(4) refer to the notion of direct and indirect routing in the IP architecture.

Possible values are:

·         Other (1) -- none of the following

·         Invalid (2) -- an invalidated route

·         Direct (3) -- route to directly connected (sub-network)

·         Indirect (4) -- route to a non-local host/network/sub-network

Proto

Route Protocol. The routing mechanism via which this route was learned. Inclusion of values for gateway routing protocols is not intended to imply that hosts should support those protocols.

Possible values are:

·        Other (1) -- none of the following

·        Local (2) -- non-protocol information, e.g., manually configured entries

·        NetMgmt (3) -- set via a network management protocol

·        ICMP (4) -- obtained via ICMP

Age

Route Age. The number of seconds since this route was last updated or otherwise determined to be correct. Note that no semantics of too old can be implied except through knowledge of the routing protocol by which the route was learned.

Mask

Route Mask. Indicate the mask to be logically ANDed with the destination address before being compared to the value in the ipRouteDest field.

 

See also: