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all three use one bits for broadcast
The interface numbers can be compared with the output following Figure 25.18, and the IP
addresses and subnet masks can be compared with the values output by the ifconfig command
in Section 3.8.
The next table, Figure 25.23, is the IP routing table. (Recall our description of routing tables in
Section 9.2.) The index used to access each row of the table is the destination IP address.
Figure 25.24 is the IP routing table on the host sun obtained with the dump ipRouteTable
command using snmpi. We have deleted all five of the routing metrics, since they are all -1. In the
column headings we've also removed the prefix ipRoute from each variable name.
IP routing table, index = < ipRouteDest >
ipRouteDest Datatype R/W lpAddress * Description
Destination IP address. A value of 0.0.0.0 indicates a
default entry. * Interface number: ifIndex. ipRouteMetricI INTEGER * Primary routing metric. The meaning of the metric
depends on the routing protocol (ipRouteProto).
A value of -1 means it's not used. ipRouteMetric2 INTEGER * Alternative routing metric. IpRouteMetric3 INTEGER * Alternative routing metric. IpRouteMetric4 INTEGER * Alternative routing metric. ipRoutelfIndex INTEGER IpRouteNextHop IpAddress *
IpRouteType INTEGER * IP address of next-hop router.
Route type: 1 = other, 2 = invalidated route, 3 =
direct, 4 = indirect. file:///D|/Documents%20and%20Settings/bigini/Doc...omenet2run/tcpip/tcp-ip-illustrated/snmp_sim.htm (20 of 33) [12/09/2001 14.47.40] Chapter 25. SNMP: Simple Network Management Protocol IpRouteProto
IpRouteAge Routing protocol: 1 = other, 4 = ICMP redirect, 8 =
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