Solaris Logic to transmit traffic to physical interfaces ( eg ce0 and ce1) Post: 302720185

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Top Forums UNIX for Dummies Questions & Answers Solaris Logic to transmit traffic to physical interfaces ( eg ce0 and ce1) Post 302720185 by shamrock on Tuesday 23rd of October 2012 02:22:53 PM

10-23-2012

Registered User

From the routing manpage...

Code:

Routing Algorithm
      The routing table entries are of three types:

           +  Entries for a specific host.
           +  Entries for all hosts on a specific network.
           +  Wildcard entries for any destination not matched by entries of
              the first two types.

      To select a route for forwarding an IP packet, the network facilities
      select the complete set of "matching" routing table entries from the
      routing table. A routing table entry is considered a match, if the
      result of the bit-wise AND operation between the netmask in the
      routing entry and the IP packet's destination address equals to the
      destination address in the routing entry.

      The network facilities then select from the set the routing entries
      that have the longest netmask.  The length of a netmask is defined as
      the number of contiguous 1 bits starting from the leftmost bit
      position in the 32-bit netmask field. In other words, the network
      facilities select the routing entry that specifies the narrowest range
      of IP addresses.  For example, the host route entry that has a
      destination/netmask pair of (147.253.56.1, 0xffffffff), is more
      specific than the network route entry that has a destination/netmask
      pair of (147.253.56.0, 0xfffffe00), therefore the network facilities
      select the host route entry. The default route by default has a
      destination/netmask pair of (0,0). Therefore the default route matches
      all destinations but it is also the least specific.  The default route
      will be selected only if there is not a more specific route.

      There may still be multiple routing entries remaining. In that case
      the IP packet is routed over the first entry displayed by netstat -r.
      Such multiple routes include:

           +  Two or more routes to a host via different gateways.
           +  Two or more routes to a network via different gateways.
           +  Two default routes.

      A superuser can change entries in the table by using the route command
      (see route(1M), or by information received in Internet Control Message
      Protocol (ICMP) redirect messages.

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LEARN ABOUT OSF1

routes

routes(4)						     Kernel Interfaces Manual							 routes(4)

NAME

       routes - Specifies Internet routing information to the routing tables

SYNOPSIS

       /etc/routes

DESCRIPTION

       Static  routes  can  be defined in the /etc/routes file.  The /etc/routes file identifies static routes that are automatically added to the
       network routing tables with the /usr/sbin/route add command.  The /sbin/init.d/route script contains the /usr/sbin/route add  command  that
       is executed for each entry in the /etc/routes file when the network is restarted on the system or the system is rebooted.

       The general format of an entry in the /etc/routes file is: Dest Name1 Name2

       The  following is a brief description of each element in an /etc/routes file entry: A keyword that indicates whether the route is to a net-
       work or to a host. The two possible keywords are -net and -host.  The name or address of the destination network or  host.   Name1  can	be
       either  a  symbolic  name (as used in the /etc/hosts or /etc/networks file) or an Internet address specified in dotted-decimal format.  The
       name or address of the gateway host to which messages should be forwarded.  Name2 can be either a symbolic name (as used in the	/etc/hosts
       file) or an Internet address specified in dotted-decimal format.

       The  routes file is a Context-Dependent Symbolic Link (CDSL) and must be maintained as such.  See the System Administration manual for more
       information.

EXAMPLES

       To specify a route to a network through a gateway host with an entry in the /etc/routes file, enter:

       -net net2 host4

	      This example specifies a route to a network, net2, through the gateway host4.  To specify a route to a host through a  gateway  host
	      with an entry in the /etc/routes file, enter:

	      -host host2 host4

	      This  example  specifies	a route to a host, host2, through the gateway host4.  To specify a route to a default gateway host with an
	      entry in the /etc/routes file, enter:

	      default 130.9.0.5

	      This example specifies a route to a default gateway with an Internet address of 130.9.0.5.

FILES

       Contains the /usr/sbin/routed add command.

RELATED INFORMATION

       Commands: route(8)

       Daemons: gated(8), routed(8)

       Files: gated.conf(4)

       Network Administration delim off

																	 routes(4)