Configuring Network Routing - Oracle ZFS Storage Appliance Administration Manual

Configuring Network Routing

The system provides a single IP routing table, consisting of a collection of routing table entries.
When an IP packet needs to be sent to a given destination, the system selects the routing entry
whose destination most closely matches the packet's destination address (subject to the system's
multihoming policy; see below). It then uses the information in the routing entry to determine
what IP interface to send the packet on and, if the destination is not directly reachable, the next-
hop gateway to use. If no routing entries match the destination, the packet will be dropped. If
multiple routing entries tie for closest match (and are not otherwise prioritized by multihoming
policy), the system will load-spread across those entries on a per-connection basis.
The system does not act as a router.
The routing table is comprised of routing entries, each of which has the following fields:
Routing Entry Fields
TABLE 15
Field
Destination
Gateway
Family
Type
Status
Interface
A routing entry with a "destination" field of 0.0.0.0/0 matches any packet (if no other route
matches more precisely), and is thus known as a 'default' route. In the BUI, default routes are
distinguished from non-default routes by an additional property:
TABLE 16 Distinguishing Default from Non-default Routes
Kind
As above, a given packet will be sent on the IP interface specified in the routing entry's
"interface" field. If an IPMP interface is specified, then one of the active IP interfaces in the
Changing the Multihoming Property to Strict (CLI)
Description
Range of IP destination addresses (in
CIDR notation) that can match the
route
Next hop (IP address) to send the
packet to (except for "system" routes
-- see below)
Internet protocol
Origin of the route
Route status
IP interface the packet will be sent
on
Route kind
Examples
192.168.0.0/22
192.168.2.80
IPv4, IPv6
dhcp, direct, static, system
active, inactive (static or direct route
associated with a disabled or offline
IP interface)
igb0
Default, Network
Configuring the Appliance 85